Cross-listings

hep-th/0606068 [abs, ps, pdf, other] :: Title: Unitarity at Infinity and Topological Holography
Authors: Brett McInnes
Comments: 18 pages including 2 eps files

Recently it has been suggested that non-gaussian inflationary perturbations can be usefully analysed in terms of a putative dual gauge theory defined on the future conformal infinity generated by an accelerating cosmology. The problem is that unitarity of this gauge theory implies a strong constraint [the "Strominger bound"] on the matter fields in the bulk. We argue that the bound is just a reflection of the equation of state of cosmological matter. The details motivate a discussion of the possible relevance of the ``dS/CFT correspondence" to the resolution of the Big Bang singularity. It is argued that the correspondence may require the Universe to come into existence along a non-singular spacelike hypersurface, as in the theories of ``creation from nothing" discussed by Firouzjahi, Sarangi, and Tye, and also by Ooguri et al. The argument makes use of the unusual properties of gauge theories defined on topologically non-trivial spaces.

Replacements

astro-ph/0501081 [abs, ps, pdf, other] :: Title: Twenty-one centimeter tomography with foregrounds
Authors: Xiaomin Wang (KICP, U Chicago, UPENN), Max Tegmark (MIT, UPENN), Mario Santos (CENTRA, UC Davis), Lloyd Knox (UC Davis)
Comments: 10 pages, 6 figures. Revised version including various cases with high noise level. Major conclusions unchanged. Accepted for publication in ApJ
Note: replaced with revised version Fri, 9 Jun 2006 16:20:35 GMT (63kb)
astro-ph/0506449 [abs, ps, pdf, other] :: Title: Can a dust dominated universe have accelerated expansion?
Authors: H. Alnes, M. Amarzguioui, O. Gron
Comments: 9 pages, 1 figure. v3: Paper shortened and updated. References added. Submitted to JCAP
Note: replaced with revised version Fri, 9 Jun 2006 12:02:34 GMT (30kb)
astro-ph/0512535 [abs, ps, pdf, other] :: Title: Mass distribution of highly flattened galaxies and modified Newtonian dynamics
Authors: W.F. Kao
Comments: 21 pages, solvable models are discussed in details in section III
Note: replaced with revised version Fri, 9 Jun 2006 19:22:48 GMT (21kb)
astro-ph/0603480 [abs, ps, pdf, other] :: Title: Magnetic fields in M dwarfs: rapid magnetic field variability in EV Lac
Authors: N. Phan-Bao, E. L. Martin, J.-F Donati, J. Lim
Comments: Accepted by ApJ Letters
Note: replaced with revised version Fri, 9 Jun 2006 15:41:07 GMT (27kb)
astro-ph/0603587 [abs, ps, pdf, other] :: Title: Recovering the Inflationary Potential and Primordial Power Spectrum With a Slow Roll Prior: Methodology and Application to WMAP 3 Year Data
Authors: Hiranya Peiris (KICP/EFI, U. Chicago), Richard Easther (Yale)
Comments: v2 adds references and fixes typos. New explanatory material added clarifying effects that depend on terms that are second order in the slow roll parameters, and the impact of the beam parametrization and SZ prior on the central value of n_s v3: Added refs, minor clarifications, title modified. In press with JCAP v4: New figures, with minor smoothing artifacts removed. Matches published version
Note: replaced with revised version Fri, 9 Jun 2006 15:27:35 GMT (273kb)
astro-ph/0603725 [abs, ps, pdf, other] :: Title: Study of time lags in HETE-2 Gamma-Ray Bursts with redshift: search for astrophysical effects and Quantum Gravity signature
Authors: J.Bolmont, J.-L.Atteia, A.Jacholkowska, F.Piron, G.Pizzichini
Comments: 12 pages, 12 figures
Note: replaced with revised version Fri, 9 Jun 2006 13:35:53 GMT (432kb)
astro-ph/0604379 [abs, ps, pdf, other] :: Title: Flux predictions of high-energy neutrinos from pulsars
Authors: Bennett Link (Montana State University, Bozeman, USA), Fiorella Burgio (INFN Sezione di Catania, Italy)
Comments: version accepted for publication in MNRAS, with discussion of effects of gravitational light bending and minor changes
Note: replaced with revised version Fri, 9 Jun 2006 07:22:33 GMT (196kb)
astro-ph/0605662 [abs, ps, pdf, other] :: Title: An equatorial wind from the massive young stellar object S140 IRS 1
Authors: Melvin G. Hoare
Comments: 19 pages, 5 figures, accepted by ApJ, minor changes in light of referees report
Note: replaced with revised version Fri, 9 Jun 2006 18:29:17 GMT (153kb)
astro-ph/0606106 [abs, ps, pdf, other] :: Title: Formation of Primordial Stars in a LCDM Universe
Authors: Naoki Yoshida (Nagoya University), Kazuyuki Omukai (NAOJ), Lars Hernquist (CfA-Harvard), Tom Abel (KIPAC, Stanford)
Comments: 27 pages, 13 embedded figures. Submitted to ApJ; typos corrected
Note: replaced with revised version Fri, 9 Jun 2006 01:32:01 GMT (299kb)
astro-ph/0606201 [abs, ps, pdf, other] :: Title: The Long Bar in the Milky Way. Corroboration of an old hypothesis
Authors: M. Lopez-Corredoira, A. Cabrera-Lavers, T. J. Mahoney, P. L. Hammersley, F. Garzon, C. Gonzalez-Fernandez
Comments: 24 pages, 6 figures, submitted to AJ; 1) we thank the GLIMPSE team for the re-discovery of the long bar we had found some years ago, although we would be more satisfied if they cited our papers too; 2) in the 2nd version we correct a misinterpretation of Stanek et al. (1997) paper with respect to the red clump method (they fit correctly 3D-density bar models along the lines of sight)
Note: replaced with revised version Fri, 9 Jun 2006 11:21:05 GMT (33kb)
hep-th/0511098 [abs, ps, pdf, other] :: Title: An Alternative Interpretation for the Moduli Fields of the Cosmology Associated to Type IIB Supergravity with Fluxes
Authors: Tonatiuh Matos, Jose-Ruben Luevano, Hugo Garcia-Compean
Comments: The complete dilatonic interaction has been included and the figure replaced. BBN is also ok in this model
Note: replaced with revised version Fri, 9 Jun 2006 12:17:19 GMT (30kb)
hep-th/0605206 [abs, ps, pdf, other] :: Title: Axions In String Theory
Authors: Peter Svrcek, Edward Witten
Comments: 62 pages, v2; references, acknowledgements and minor corrections added
Note: replaced with revised version Fri, 9 Jun 2006 19:01:52 GMT (54kb)
hep-th/0605263 [abs, ps, pdf, other] :: Title: Holographic probabilities in eternal inflation
Authors: Raphael Bousso
Comments: 5 pages, 3 figures. v3: reference fixed
Note: replaced with revised version Thu, 8 Jun 2006 20:22:16 GMT (16kb)

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Cross-listings

gr-qc/0606039 [abs, ps, pdf, other] :: Title: The Vector-Tensor nature of Bekenstein's relativistic theory of Modified Gravity
Authors: T.G. Zlosnik, P.G. Ferreira, Glenn D. Starkman
Comments: submitted to PRD (Rapid Communications)

Bekenstein's theory of relativistic gravity is conventionally written as a bi-metric theory. The two metrics are related by a disformal transformation defined by a dynamical vector field and a scalar field. In this comment we show that the theory can be re-written as Vector-Tensor theory akin to Einstein-Aether theories with non-canonical kinetic terms. We discuss some of the implications of this equivalence.
hep-th/0606077 [abs, ps, pdf, other] :: Title: Gravitational Anomalies, Hawking Radiation, and Spherically Symmetric Black Holes
Authors: Elias C. Vagenas, Saurya Das
Comments: 12 pages, no figure, LaTeX

Motivated by the recent work of Robinson and Wilczek, we show that the gravitational anomaly in the Vaidya spacetime of arbitrary mass function is cancelled by the total flux of a 1+1 dimensional blackbody at the Hawking temperature of the spacetime. This cancellation restores general covariance at the quantum level. Furthermore, we generalize their results to the most general static, and spherically symmetric spacetimes.
hep-th/0606085 [abs, ps, pdf, other] :: Title: Planck scale inflationary spectra from quantum gravity
Authors: Gian Luigi Alberghi, Roberto Casadio, Alessandro Tronconi
Comments: 4 pages, no figures

We derive the semiclassical evolution of massless minimally coupled scalar matter in the de Sitter space-time from the Born-Oppenheimer reduction of the Wheeler-DeWitt equation. We show that the dynamics of trans-Planckian modes can be cast in the form of a modified effective dispersion relation but quantum matter states are not significantly affected by quantum fluctuation terms. Correspondingly, high energy corrections in the power spectrum of the cosmic microwave background radiation produced during inflation are expected to remain very small.
physics/0606083 [abs, ps, pdf, other] :: Title: The $H_3^+$ molecular ion in a magnetic field in linear parallel configuration
Authors: A. V. Turbiner, N. L. Guevara, J. C. López Vieyra
Comments: 25 pages, 6 figures, 12 tables
Subj-class: Atomic Physics; Chemical Physics; Strongly Correlated Electrons

A first detailed study of the ground state of the $H_3^+$ molecular ion in linear configuration, parallel to a magnetic field direction, and its low-lying $\Si,\Pi,\De$ states is carried out for magnetic fields $B=0-4.414 \times 10^{13} $G in the Born-Oppenheimer approximation. The variational method is employed with a single trial function which includes interelectron correlation term explicitly in the form $\exp{(\ga r_{12})}$, where $\ga$ is a parameter. It is shown that the quantum numbers of the state of the lowest total energy (ground state) depend on the magnetic field strength. Ground state evolves from spin-singlet ${}^1\Si_g$ state for weak magnetic fields $B \lesssim 5 \times 10^{8} $G to the weakly-bound spin-triplet ${}^3\Si_u$ state for intermediate fields and, eventually, to the spin-triplet $^3\Pi_u$ state for $5 \times 10^{10} $G$\lesssim B \lesssim 4.414 \times 10^{13} $G.

Replacements

astro-ph/0405417 [abs, ps, pdf, other] :: Title: Searches for Cosmic Antimatter
Authors: Diego Casadei
Comments: 25 pages, 3 figures
Note: replaced with revised version Mon, 12 Jun 2006 07:36:40 GMT (42kb)
astro-ph/0508390 [abs, ps, pdf, other] :: Title: N-body simulations of the Magellanic Stream
Authors: Tim W. Connors (1), Daisuke Kawata (1 and 2), Brad K. Gibson (3) ((1) Swinburne (2) Carnegie Observatories (3) Central Lancashire)
Comments: Accepted by MNRAS, 07 Jun 2006. 14 pages, 14 figures, 3 tables. LaTeX (mn2e.sty). File with decent resolution images (strongly recommended) available at this http URL . References added; distance and HI-LOres difference figures added; clearer figures; discussion added to, but conclusions unchanged
Note: replaced with revised version Mon, 12 Jun 2006 16:26:38 GMT (990kb)
astro-ph/0509314 [abs, ps, pdf, other] :: Title: On the origin of anomalous velocity clouds in the Milky Way
Authors: Tim W. Connors (1), Daisuke Kawata (1 and 2), Jeremy Bailin (1), Jason Tumlinson (3), Brad K. Gibson (4) ((1) Swinburne (2) Carnegie Observatories (3) Yale (4) Central Lancashire)
Comments: Accepted by ApJL, 08 Jun 2006. 5 pages, 5 figures, 1 table. LaTeX (emulateapj.cls). File with high resolution images available at this http URL . References added; discussion added to, but conclusions unchanged
Note: replaced with revised version Mon, 12 Jun 2006 15:37:54 GMT (640kb)
astro-ph/0512446 [abs, ps, pdf, other] :: Title: On the Origin of [OII] Emission in Red Sequence and Post-starburst Galaxies
Authors: Renbin Yan, Jeffrey A. Newman, S.M. Faber, Nicholas Konidaris, David Koo, Marc Davis
Comments: 21 pages, 15 figures. v2: Added 4 new figures and updated many; extended text. No conclusions change. v3: minor modifications and figure updates to match version accepted by ApJ
Note: replaced with revised version Sun, 11 Jun 2006 09:00:35 GMT (973kb)
astro-ph/0601402 [abs, ps, pdf, other] :: Title: The baryon mass function for galaxy clusters
Authors: S. E. Nuza (IAFE), A. Blanchard (LATT)
Comments: Typos corrected. Replaced to match published version. 5 pages, 2 figures, aa.cls
Journal-ref: Astron. Astrophys. 452 (2006) 47-50
Note: replaced with revised version Mon, 12 Jun 2006 13:53:23 GMT (34kb)
astro-ph/0602137 [abs, ps, pdf, other] :: Title: Deciphering Inflation with Gravitational Waves: Cosmic Microwave Background Polarization vs. Direct Detection with Laser Interferometers
Authors: Tristan L. Smith (Caltech), Hiranya V. Peiris (KICP/EFI, U. Chicago), Asantha Cooray (U.C. Irvine)
Comments: 6 pages, 2 color figures. replaced with published version. Full resolution figures are available at this http URL
Journal-ref: Phys.Rev.D73:123503,2006
Note: replaced with revised version Fri, 9 Jun 2006 22:30:07 GMT (607kb)
astro-ph/0602538 [abs, ps, pdf, other] :: Title: Effect of hyperon-hyperon interaction on bulk viscosity and r-mode instability in neutron stars
Authors: Debarati Chatterjee, Debades Bandyopadhyay, (Saha Institute of Nuclear Physics, India)
Comments: 25 pages, 10 figures; two new figures added and results and discussion section revised; final version to appear in PRD
Note: replaced with revised version Mon, 12 Jun 2006 16:29:07 GMT (34kb)
astro-ph/0603322 [abs, ps, pdf, other] :: Title: Beta decay radiation signature from neutron-rich gamma-ray bursts?
Authors: Soebur Razzaque, Peter Meszaros
Comments: 11 pages, 2 figures, reference added, published version
Journal-ref: JCAP06(2006)006
Note: replaced with revised version Fri, 9 Jun 2006 22:10:01 GMT (152kb)
astro-ph/0603725 [abs, ps, pdf, other] :: Title: Study of time lags in HETE-2 Gamma-Ray Bursts with redshift: search for astrophysical effects and Quantum Gravity signature
Authors: J.Bolmont, J.-L.Atteia, A.Jacholkowska, F.Piron, G.Pizzichini
Comments: 12 pages, 12 figures
Note: replaced with revised version Mon, 12 Jun 2006 14:22:19 GMT (432kb)
astro-ph/0604153 [abs, ps, pdf, other] :: Title: Are short gamma-ray bursts collimated? GRB050709, a flare but no break
Authors: D. Watson, J. Hjorth, P. Jakobsson, D. Xu, J. P. U. Fynbo, J. Sollerman, C. C. Thöne, K. Pedersen (DARK, Copenhagen)
Comments: 5 pages, 2 figures, accepted for publication in A&A Letters with minor corrections
Note: replaced with revised version Mon, 12 Jun 2006 13:06:24 GMT (20kb)
astro-ph/0604216 [abs, ps, pdf, other] :: Title: Virgo cluster early-type dwarf galaxies with the Sloan Digital Sky Survey. I. On the possible disk nature of bright early-type dwarfs
Authors: Thorsten Lisker, Eva K. Grebel, Bruno Binggeli (University of Basel)
Comments: 25 pages, 20 figures. Accepted for publication by AJ. V2: Title shortened. Full resolution version available at this http URL
Note: replaced with revised version Mon, 12 Jun 2006 18:54:45 GMT (956kb)
astro-ph/0604477 [abs, ps, pdf, other] :: Title: Black-Hole Accretion Disc as an Analogue Gravity Model
Authors: Tapas Kumar Das, Neven Bilic, Surajit Dasgupta
Comments: Minor changes made. 30 pages, 8 figures, RevTex. High resolution version is available at this http URL or by sending an email request to <tapas@mri.ernet.in>
Note: replaced with revised version Mon, 12 Jun 2006 10:56:15 GMT (147kb)
astro-ph/0605198 [abs, ps, pdf, other] :: Title: Cosmological Acceleration: Dark Energy or Modified Gravity?
Authors: Sidney Bludman
Comments: growth factor figures 3, 4 replaced; editorial changes; many more references cited
Note: replaced with revised version Mon, 12 Jun 2006 15:12:58 GMT (65kb)
astro-ph/0605554 [abs, ps, pdf, other] :: Title: V4745 Sgr -- a nova above the period gap and an intermediate polar candidate
Authors: Andrej Dobrotka, Alon Retter, Alex Liu
Comments: 6 pages, 8 figures, accepted for publication in MNRAS
Note: replaced with revised version Mon, 12 Jun 2006 18:27:55 GMT (173kb)
astro-ph/0606015 [abs, ps, pdf, other] :: Title: Substructure around M31 : Evolution and Effects
Authors: Jean-Rene Gauthier (1), John Dubinski (1), Lawrence M. Widrow (2) ((1) University of Toronto, (2) Queen's University)
Comments: 45 pages, 18 figures. To be submitted to the Astrophysical Journal, version 2.0 : scale height value corrected, references added, and some figures have been modified
Note: replaced with revised version Mon, 12 Jun 2006 19:40:23 GMT (640kb)
astro-ph/0606208 [abs, ps, pdf, other] :: Title: Proper motion of gamma-rays from microhalo sources
Authors: Savvas M. Koushiappas (LANL)
Comments: Typos corrected
Note: replaced with revised version Mon, 12 Jun 2006 17:06:30 GMT (21kb)
gr-qc/0606025 [abs, ps, pdf, other] :: Title: Cosmology in three dimensions: steps towards the general solution
Authors: John D. Barrow, Douglas J. Shaw, Christos G. Tsagas
Comments: 35 pages, 2 figures
Subj-class: General Relativity and Quantum Cosmology; Mathematical Physics
Note: replaced with revised version Sat, 10 Jun 2006 09:05:55 GMT (43kb)
hep-ph/0510066 [abs, ps, pdf, other] :: Title: Gauge independent approach to chiral symmetry breaking in a strong magnetic field
Authors: C. N. Leung, S.-Y. Wang
Comments: 37 pages, 5 figures, typos corrected, published version
Subj-class: High Energy Physics - Phenomenology; Mesoscopic Systems and Quantum Hall Effect
Journal-ref: Nucl.Phys. B747 (2006) 266
Note: replaced with revised version Mon, 12 Jun 2006 05:10:10 GMT (52kb)
hep-ph/0606014 [abs, ps, pdf, other] :: Title: The Search for Dark Matter Axions
Authors: Pierre Sikivie
Comments: 10 pages, invited talk at the 41st Rencontre de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, March 11-18, 2006. Three references were added
Note: replaced with revised version Mon, 12 Jun 2006 15:04:51 GMT (16kb)
hep-ph/0606063 [abs, ps, pdf, other] :: Title: The phase diagram of neutral quark matter with pseudoscalar condensates in the color-flavor locked phase
Authors: Harmen J. Warringa
Comments: 9 pages, 5 figures. Minor modification to Sec. IV A. Conclusions unchanged
Note: replaced with revised version Mon, 12 Jun 2006 11:04:21 GMT (263kb)
hep-th/0503178 [abs, ps, pdf, other] :: Title: Racetrack inflation and assisted moduli stabilisation
Authors: Zygmunt Lalak (Warsaw), Graham G. Ross, Subir Sarkar (Oxford)
Comments: 17 pages, 6 figures (Latex); Error in v.1 eliminated and improved example of modular inflation presented
Note: replaced with revised version Mon, 12 Jun 2006 17:50:30 GMT (211kb)

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Cross-listings

gr-qc/0605071 [abs, ps, pdf, other] :: Title: A Markov Chain Monte Carlo approach to the study of massive black hole binary systems with LISA
Authors: E.D.L.Wickham, A.Stroeer, A.Vecchio
Comments: submitted to cqg as GWDAW-10 conference proceedings, 10 pages, 4 figures, some changes to plots and numerical details

The Laser Interferometer Space Antenna (LISA) will produce a data stream containing a vast number of overlapping sources: from strong signals generated by the coalescence of massive black hole binary systems to much weaker radiation form sub-stellar mass compact binaries and extreme-mass ratio inspirals. It has been argued that the observation of weak signals could be hampered by the presence of loud ones and that they first need to be removed to allow such observations. Here we consider a different approach in which sources are studied simultaneously within the framework of Bayesian inference. We investigate the simplified case in which the LISA data stream contains radiation from a massive black hole binary system superimposed over a (weaker) quasi-monochromatic waveform generated by a white dwarf binary. We derive the posterior probability density function of the model parameters using an automatic Reversible Jump Markov Chain Monte Carlo algorithm (RJMCMC). We show that the information about the sources and noise are retrieved at the expected level of accuracy without the need of removing the stronger signal. Our analysis suggests that this approach is worth pursuing further and should be considered for the actual analysis of the LISA data.
hep-ph/0606123 [abs, ps, pdf, other] :: Title: Towards the robustness of the Affleck-Dine baryogenesis
Authors: Shinta Kasuya, Masahiro Kawasaki
Comments: 6 pages

We study the Affleck-Dine mechanism with various types of the Kahler potential, and investigate whether or not the Affleck-Dine field could acquire a large VEV as an initial condition for successful baryogenesis. In addition to a negative Hubble-induced mass term, we find that large enough Hubble-induced A-terms could also develop the minimum at large amplitude of the field. Therefore, the Affleck-Dine mechanism works for broader classes of the theories.
hep-ph/0606137 [abs, ps, pdf, other] :: Title: Elliptic Inflation: Generating the curvature perturbation without slow-roll
Authors: Tomohiro Matsuda
Comments: 26pages, 8figures

There are many inflationary models in which inflaton field does not satisfy the slow-roll condition. In such models, it is difficult to generate the curvature perturbation during inflation. Thus, to generate the curvature perturbation, one must introduce another component to the theory. To cite a case, curvatons may generate dominant part of the curvature perturbation after inflation. However, we have a question whether it is unrealistic to consider the generation of the curvature perturbation during inflation without slow-roll. Assuming multi-field inflation, we encounter the generation of the curvature perturbation during inflation without slow-roll. This idea can be used to solve the serious eta-problem that arises in brane inflationary models.
hep-th/0606051 [abs, ps, pdf, other] :: Title: New type scalar fields for cosmic acceleration
Authors: Alex Kehagias
Comments: 6 pages

We present a model where a non-conventional scalar field may act like dark energy leading to cosmic acceleration. The latter is driven by an appropriate field configuration, which result in an effective cosmological constant. The potential role of such a scalar in the cosmological constant problem is also discussed.
hep-th/0606090 [abs, ps, pdf, other] :: Title: Starting the Universe: Stable Violation of the Null Energy Condition and Non-standard Cosmologies
Authors: Paolo Creminelli (ICTP, Trieste), Markus A. Luty (Maryland U.), Alberto Nicolis (Harvard U., Phys. Dept.), Leonardo Senatore (MIT)
Comments: 27 pages, 3 figures

We present a consistent effective theory that violates the null energy condition (NEC) without developing any instabilities or other pathological features. The model is the ghost condensate with the global shift symmetry softly broken by a potential. We show that this system can drive a cosmological expansion with dH/dt > 0. Demanding the absence of instabilities in this model requires dH/dt <~ H^2. We then construct a general low-energy effective theory that describes scalar fluctuations about an arbitrary FRW background, and argue that the qualitative features found in our model are very general for stable systems that violate the NEC. Violating the NEC allows dramatically non-standard cosmological histories. To illustrate this, we construct an explicit model in which the expansion of our universe originates from an asymptotically flat state in the past, smoothing out the big-bang singularity within control of a low-energy effective theory. This gives an interesting alternative to standard inflation for solving the horizon problem. We also construct models in which the present acceleration has w < -1; a periodic ever-expanding universe and a model with a smooth ``bounce'' connecting a contracting and expanding phase.
hep-th/0606091 [abs, ps, pdf, other] :: Title: The null energy condition and instability
Authors: Roman V. Buniy, Stephen D. H. Hsu, Brian M. Murray
Comments: 11 pages, 5 figures, Revtex

We extend previous work showing that violation of the null energy condition implies instability in a broad class of models, including gauge theories with scalar and fermionic matter as well as any perfect fluid. Simple examples are given to illustrate these results. The role of causality in our results is discussed. Finally, we extend the fluid results to more general systems in thermal equilibrium. When applied to the dark energy, our results imply that w is unlikely to be less than -1.

Replacements

astro-ph/0405417 [abs, ps, pdf, other] :: Title: Searches for Cosmic Antimatter
Authors: Diego Casadei
Comments: 26 pages, 3 figures
Note: replaced with revised version Tue, 13 Jun 2006 07:52:19 GMT (42kb)
astro-ph/0505202 [abs, ps, pdf, other] :: Title: Equation of state for Universe from similarity symmetries
Authors: Marek Szydlowski, Wlodzimierz Godlowski, Radoslaw Wojtak
Comments: accepted for publication version
Journal-ref: Gen.Rel.Grav. 38 (2006) 795
Note: replaced with revised version Tue, 13 Jun 2006 11:14:42 GMT (149kb)
astro-ph/0510027 [abs, ps, pdf, other] :: Title: Improving Foreground Subtraction in Statistical Observations of 21 cm Emission from the Epoch of Reionization
Authors: Miguel F. Morales, Judd D. Bowman, Jacqueline N. Hewitt
Comments: Replaced with version accepted by ApJ: minor text changes to make the paper clearer, updated references
Note: replaced with revised version Mon, 12 Jun 2006 21:53:42 GMT (207kb)
astro-ph/0601402 [abs, ps, pdf, other] :: Title: The baryon mass function for galaxy clusters
Authors: S. E. Nuza (IAFE), A. Blanchard (LATT)
Comments: Typos corrected. Replaced to match published version. 5 pages, 2 figures, aa.cls
Journal-ref: Astron. Astrophys. 452 (2006) 47-50
Note: replaced with revised version Tue, 13 Jun 2006 16:42:28 GMT (48kb)
astro-ph/0601463 [abs, ps, pdf, other] :: Title: On the normalisation of the cosmic star formation history
Authors: Andrew M. Hopkins (1), John F. Beacom (2) ((1) University of Sydney, (2) The Ohio State University)
Comments: 15 pages, 8 figures, accepted for publication in ApJ, major revisions following referee's comments
Note: replaced with revised version Tue, 13 Jun 2006 00:54:57 GMT (200kb)
astro-ph/0602497 [abs, ps, pdf, other] :: Title: Panchromatic study of GRB 060124: from precursor to afterglow
Authors: P. Romano, S. Campana, G. Chincarini (INAF-OAB), J. Cummings (GSFC), G. Cusumano (INAF-IASF-Pa), S. T. Holland (GSFC), V. Mangano, T. Mineo (INAF-IASF-Pa), K. L. Page (U Leicester), V. Pal'shin (Ioffe PTI), E. Rol (U Leicester), T. Sakamoto (GSFC), B. Zhang (U Nevada), R. Aptekar (Ioffe PTI), S. Barbier (GSFC), S. Barthelmy (GSFC), A. P. Beardmore (U Leicester), P. Boyd (GSFC), D. N. Burrows (PSU), M. Capalbi (ASDC), E. E. Fenimore (LANL), D. Frederiks (Ioffe PTI), N. Gehrels (GSFC), P. Giommi (ASDC), M. R. Goad (U Leicester), O. Godet (U Leicester), S. Golenetskii (Ioffe PTI), D. Guetta (OAR), J. A. Kennea (PSU), V. La Parola (INAF-IASF-Pa), D. Malesani (SISSA/ISAS), F. Marshall (GSFC), A. Moretti (OAB), J. A. Nousek (PSU), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), M. Perri (ASDC), et al (0 additional authors not shown)
Comments: 15 pages, 14 figures, 6 tables. Astronomy and Astrophysics, accepted. Revised UVOT photometry
Note: replaced with revised version Tue, 13 Jun 2006 14:54:13 GMT (202kb)
astro-ph/0603072 [abs, ps, pdf, other] :: Title: Non-equilibrium Ionization State of Warm-Hot Intergalactic Medium
Authors: Kohji Yoshikawa, Shin Sasaki
Comments: 25 pages, 18 figures, accepted for publication in PASJ
Note: replaced with revised version Tue, 13 Jun 2006 07:29:13 GMT (653kb)
astro-ph/0603609 [abs, ps, pdf, other] :: Title: Near-Infrared and Optical Luminosity Functions from the 6dF Galaxy Survey
Authors: D. Heath Jones (AAO), Bruce A. Peterson (ANU), Matthew Colless (AAO), Will Saunders (AAO)
Comments: 20 pages, 15 figures. MNRAS published. Replaces earlier version carrying a typo in Table 6. High resolution versions of the figures can be obtained from this http URL
Journal-ref: Mon. Not. R. Astron. Soc. 369, 25-42 (2006)
Note: replaced with revised version Tue, 13 Jun 2006 05:32:57 GMT (739kb)
astro-ph/0603741 [abs, ps, pdf, other] :: Title: Magnetic Field Decay and Period Evolution of Anomalous X-Ray Pulsars in the Context of Quark Stars
Authors: Brian Niebergal, Rachid Ouyed, Denis Leahy
Comments: 4 pages, 4 figures, accepted to ApJ Letters
Note: replaced with revised version Tue, 13 Jun 2006 00:05:44 GMT (59kb)
astro-ph/0605354 [abs, ps, pdf, other] :: Title: Cosmological Neutrino Entanglement and Quantum Pressure
Authors: Daniel Pfenniger, Veruska Muccione (Geneva Observatory, University of Geneva, Switzerland)
Comments: 11 pages, 7 figures, accepted version to Astronomy & Astrophysics
Note: replaced with revised version Tue, 13 Jun 2006 14:40:03 GMT (859kb)
astro-ph/0606130 [abs, ps, pdf, other] :: Title: Revealing the Dark TeV Sky: The Atmospheric Cherenkov Imaging Technique for Very High Energy Gamma-ray Astronomy
Authors: Trevor C. Weekes
Comments: To be published in the Proceedings of the International Workshop on "Energy Budget in the High Energy Universe", Kashiwa, Japan, February 22-24, 2006
Note: replaced with revised version Tue, 13 Jun 2006 17:42:55 GMT (577kb)
astro-ph/0606223 [abs, ps, pdf, other] :: Title: Galaxy number counts in a presence of the graviton background
Authors: Michael A. Ivanov
Comments: 13 pages, 6 figures, Latex
Note: replaced with revised version Tue, 13 Jun 2006 08:08:48 GMT (141kb)
astro-ph/0606265 [abs, ps, pdf, other] :: Title: The mean electro-motive force, current- and cross-helicity under the influence of rotation, magnetic field and shear
Authors: V.V.Pipin
Comments: 29 pages, 9 figures, submitted to GAFD
Note: replaced with revised version Tue, 13 Jun 2006 10:23:03 GMT (61kb)
hep-th/0603199 [abs, ps, pdf, other] :: Title: (De)coupling Limit of DGP
Authors: Gregory Gabadadze, Alberto Iglesias
Comments: 14 pages; v2: typos corrected, footnote added, to apppear in PLB
Note: replaced with revised version Tue, 13 Jun 2006 18:27:54 GMT (16kb)
hep-th/0605257 [abs, ps, pdf, other] :: Title: Quantum fluctuations in the DGP model and the size of the cross-over scale
Authors: Oriol Pujolas
Comments: 16 pages, 2 figures. References added
Note: replaced with revised version Mon, 12 Jun 2006 20:57:04 GMT (66kb)
physics/0604211 [abs, ps, pdf, other] :: Title: Wavelets and Solar Magnetic Activity I: Wavelets on the Edge
Authors: Robert W. Johnson (Fusion Research Center, Georgia Institute of Technology)
Comments: v3, 8 pages, 7 figures, aastex, corrections made, harmonic analysis added, references added
Subj-class: Data Analysis, Statistics and Probability; Space Physics
Note: replaced with revised version Tue, 13 Jun 2006 16:41:51 GMT (352kb)

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gr-qc/0606056 [abs, ps, pdf, other] :: Title: Inflaton perturbations in brane-world cosmology with induced gravity
Authors: Kazuya Koyama, Shuntaro Mizuno
Comments: 20 pages, 4 figures

We study cosmological perturbations in the brane models with an induced Einstein-Hilbert term on a brane. We consider an inflaton confined to a de Sitter brane in a five-dimensional Minkowski spacetime. Inflaton fluctuations excite Kaluza-Klein modes of bulk metric perturbations with mass $m^2 = -2(2\ell-1) (\ell +1) H^2$ and $m^2 = -2\ell(2\ell+3) H^2$ where $\ell$ is an integer. There are two branches ($\pm$ branches) of solutions for the background spacetime. In the $+$ branch, which includes the self-accelerating universe, a resonance appears for a mode with $m^2 = 2 H^2$ due to a spin-0 perturbation with $m^2 = 2H^2$. The self-accelerating universe has a distinct feature because there is also a helicity-0 mode of spin-2 perturbations with $m^2 = 2H^2$. In the $-$ branch, which can be thought as the Randall-Sundrum type brane-world with the high energy quantum corrections, there is no resonance. At high energies, we analytically confirm that four-dimensional Einstein gravity is recovered, which is related to the disappearance of van Dam-Veltman-Zakharov discontinuity in de Sitter spacetime.
On sufficiently small scales, we confirm that the lineariaed gravity on the brane is well described by the Brans-Dicke theory with $\omega=3Hr_c$ in $-$ branch and $\omega = -3H r_c$ in $+$ branch, respectively, which confirms the existence of the ghost in $+$ branch. We also study large scale perturbations. In $+$ branch, the resonance induces a non-trivial anisotropic stress on the brane via the projection of Weyl tensor in the bulk, but no instability is shown to exist on the brane.
gr-qc/0606059 [abs, ps, pdf, other] :: Title: A hybrid approach to black hole perturbations from extended matter sources
Authors: Valeria Ferrari, Leonardo Gualtieri, Luciano Rezzolla
Comments: 12 pages, 4 figures. Phys. Rev. D, in press

We present a new method for the calculation of black hole perturbations induced by extended sources in which the solution of the nonlinear hydrodynamics equations is coupled to a perturbative method based on Regge-Wheeler/Zerilli and Bardeen-Press-Teukolsky equations when these are solved in the frequency domain. In contrast to alternative methods in the time domain which may be unstable for rotating black-hole spacetimes, this approach is expected to be stable as long as an accurate evolution of the matter sources is possible. Hence, it could be used under generic conditions and also with sources coming from three-dimensional numerical relativity codes. As an application of this method we compute the gravitational radiation from an oscillating high-density torus orbiting around a Schwarzschild black hole and show that our method is remarkably accurate, capturing both the basic quadrupolar emission of the torus and the excited emission of the black hole.
hep-ph/0606120 [abs, ps, pdf, other] :: Title: Quantum Corrections in Quintessence Models
Authors: Mathias Garny
Comments: 10 pages + appendix

We investigate the impact of quantum fluctuations on a light rolling quintessence field from three different sources, namely from a coupling to the standard model and dark matter, from its self-couplings and from its coupling to gravity. We derive bounds for time-varying masses from the change of vacuum energy, finding \Delta m_e/m_e << 10^{-11} for the electron and \Delta m_p/m_p << 10^{-15} for the proton since redshift z~2, whereas the neutrino masses could change of order one. Mass-varying dark matter is also constrained. Next, the self-interactions are investigated. For inverse power law potentials, the effective potential does not become infinitely large at small field values, but saturates at a finite maximal value. We discuss implications for cosmology. Finally, we show that one-loop corrections induce non-minimal gravitational couplings involving arbitrarily high powers of the curvature scalar R, indicating that quintessence entails modified gravity effects.

Replacements

astro-ph/0508046 [abs, ps, pdf, other] :: Title: The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies
Authors: Darren J. Croton, Volker Springel, Simon D. M. White, G. De Lucia, C. S. Frenk, L. Gao, A. Jenkins, G. Kauffmann, J. F. Navarro, N. Yoshida
Comments: 21 pages, 12 figures, accepted MNRAS, Millennium Run semi-analytic galaxy catalogues are available for download at this http URL (~9 million galaxies brighter than -17.4 in r), mini Millennium Run catalogues also available for testing purposes
Journal-ref: Mon.Not.Roy.Astron.Soc. 365 (2006) 11-28
Note: replaced with revised version Wed, 14 Jun 2006 04:55:30 GMT (791kb)
astro-ph/0510407 [abs, ps, pdf, other] :: Title: Lyman Alpha Radiation From Collapsing Protogalaxies I: Characteristics of the Emergent Spectrum
Authors: Mark Dijkstra (Columbia, Melbourne), Zoltan Haiman (Columbia), Marco Spaans (Groningen)
Comments: Accepted for Publication in ApJ, 21 emulateapj pages with 12 figures, together with a companion paper
Note: replaced with revised version Wed, 14 Jun 2006 04:21:56 GMT (154kb)
astro-ph/0510409 [abs, ps, pdf, other] :: Title: Lyman Alpha Radiation From Collapsing Protogalaxies II: Observational Evidence for Gas Infall
Authors: Mark Dijkstra (Columbia, Melbourne), Zoltan Haiman (Columbia), Marco Spaans (Groningen)
Comments: Accepted for Publication in ApJ, 11 emulateapj pages with 6 figures, together with a companion paper
Note: replaced with revised version Wed, 14 Jun 2006 04:33:57 GMT (60kb)
astro-ph/0603200 [abs, pdf] :: Title: Habitability of known exoplanetary systems based on measured stellar properties
Authors: Barrie W Jones, P Nick Sleep, David R Underwood
Comments: Accepted for publication by The Astrophysical Journal. A few revisions have been made following suggestions by the referee
Note: replaced with revised version Wed, 14 Jun 2006 17:14:32 GMT (497kb)
astro-ph/0603353 [abs, ps, pdf, other] :: Title: Observational constraints on self-accelerating cosmology
Authors: Roy Maartens, Elisabetta Majerotto (Portsmouth)
Comments: revised to use WMAP3 data for the CMB shift and to add clarifications on geometric tests and structure formation; main results unchanged
Note: replaced with revised version Wed, 14 Jun 2006 13:41:36 GMT (355kb)
astro-ph/0603403 [abs, ps, pdf, other] :: Title: Inflationary Potential Reconstruction for a WMAP Running Power Spectrum
Authors: James M. Cline, Loison Hoi
Comments: 21 pages, 16 figures; best fit parameters changed somewhat due to finding lower chi squared in COSMOMC; statistical significance of running slightly reduced; published version
Note: replaced with revised version Tue, 13 Jun 2006 22:15:42 GMT (103kb)
astro-ph/0603574 [abs, ps, pdf, other] :: Title: Luminous Infrared Galaxies in the Local Universe
Authors: J. L. Wang (1,2,3), X. Y. Xia (3), S. Mao (4), C. Cao (1,2), Hong Wu (1), Z. G. Deng (5) ((1)NAOC (2)Graduate School of the Chinese Academy of Sciences (3)Department of Physics, Tianjin Normal University (4)Jodrell Bank Observatory, University of Manchester (5)College of Physical Sciences, Graduate School, CAS)
Comments: 22 pages, 5 figures, accepted for publication in ApJ, title changed, typos corrected,major revisions following referee's comments,updated references
Note: replaced with revised version Wed, 14 Jun 2006 00:53:45 GMT (622kb)
astro-ph/0603747 [abs, ps, pdf, other] :: Title: White Dwarf - Red Dwarf Systems Resolved with the Hubble Space Telescope: I. First Results
Authors: J. Farihi, D.W. Hoard, S. Wachter
Comments: 46 pages, 3 figures, 5 tables, accepted to ApJ. Full-resolution images available upon request. A few table entries corrected
Note: replaced with revised version Wed, 14 Jun 2006 07:54:16 GMT (171kb)
astro-ph/0604476 [abs, ps, pdf, other] :: Title: Gravitational lensing effects on the gamma-ray burst Hubble diagram
Authors: Masamune Oguri, Keitaro Takahashi (Princeton)
Comments: 5 pages, 3 figures, accepted for publication in Phys. Rev. D. Quantitative results were changed because of using a new luminosity function of GRBs
Note: replaced with revised version Wed, 14 Jun 2006 02:07:43 GMT (29kb)
astro-ph/0605229 [abs, ps, pdf, other] :: Title: Variability of V838 Mon Before Its Outburst
Authors: S. Kimeswenger (Astro- u. Teilchenphysik Innsbruck) S.P.S. Eyres (Dept. of Physics, Astronomy & Mathematics Preston)
Comments: 4 pages, 3 Postscript figures, in press - Revision after minor changes and a misprint in the table
Note: replaced with revised version Wed, 14 Jun 2006 08:03:51 GMT (140kb)
astro-ph/0605354 [abs, ps, pdf, other] :: Title: Cosmological Neutrino Entanglement and Quantum Pressure
Authors: Daniel Pfenniger, Veruska Muccione (Geneva Observatory, University of Geneva, Switzerland)
Comments: 11 pages, 7 figures, accepted version to Astronomy & Astrophysics (no change, correct wrong TeX rendering)
Note: replaced with revised version Wed, 14 Jun 2006 15:56:45 GMT (859kb)
astro-ph/0605359 [abs, ps, pdf, other] :: Title: A Spitzer Infrared Spectrograph Survey of Warm Molecular Hydrogen in Ultra-luminous Infrared Galaxies
Authors: S. J. U. Higdon, L. Armus, J. L. Higdon, B. T. Soifer, H. W. W. Spoon
Comments: Accepted ApJ 01 September 2006, v648n1 issue. 14 pages 12 figures IRAS 06361-6217 the f25/f60 ratio is 0.10 not 1.00
Note: replaced with revised version Wed, 14 Jun 2006 15:27:12 GMT (565kb)
astro-ph/0605716 [abs, ps, pdf, other] :: Title: Low sulfur depletion in the Horsehead PDR
Authors: J.R. Goicoechea, J. Pety, M. Gerin, D. Teyssier, E. Roueff, P. Hily-Blant, S. Baek
Comments: 20 pages, 17 figures, accepted in A&A, 2006 June 9 (Figs 1 & 4 are bitmaped)
Note: replaced with revised version Wed, 14 Jun 2006 17:09:31 GMT (639kb)
astro-ph/0606183 [abs, ps, pdf, other] :: Title: Constraints on cosmological parameters
Authors: A. Balbi
Comments: 10 pages. Invited review talk given at "CMB and Physics of the Early Universe" - International Conference - Ischia, Italy, 20-22 April 2006. To appear in Proceedings of Science
Note: replaced with revised version Wed, 14 Jun 2006 07:25:15 GMT (54kb)
astro-ph/0606253 [abs, ps, pdf, other] :: Title: Faint X-ray Sources in the Globular Cluster Terzan 5
Authors: C. O. Heinke, R. Wijnands, H. N. Cohn, P. M. Lugger, J. E. Grindlay, D. Pooley, W. H. G. Lewin
Comments: 15 pages, 10 figures (3 color). Resubmitted to ApJ after incorporating referee comments. v2: Added references to introduction
Note: replaced with revised version Tue, 13 Jun 2006 23:36:17 GMT (196kb)
astro-ph/0606325 [abs, pdf] :: Title: Fossil Biodiversity: Red Noise Plus Signal
Authors: Adrian L. Melott, Bruce S. Lieberman (University of Kansas)
Comments: 3 page comment including one figure. corrected typo in abstract & figure caption
Subj-class: Astrophysics; Populations and Evolution
Note: replaced with revised version Wed, 14 Jun 2006 13:52:14 GMT (80kb)
gr-qc/0605045 [abs, ps, pdf, other] :: Title: Covariance properties and regularization of conserved currents in tetrad gravity
Authors: Yuri N. Obukhov, Guillermo F. Rubilar
Comments: 36 pages, Revtex, no figures; small changes, published version
Journal-ref: Phys. Rev. D73 (2006) 124017
Note: replaced with revised version Tue, 13 Jun 2006 23:11:14 GMT (24kb)
hep-ph/0509061 [abs, ps, pdf, other] :: Title: Primordial black holes from monopoles connected by strings
Authors: Tomohiro Matsuda
Comments: 16 pages, 2 figures, added many comments and a new result
Note: replaced with revised version Wed, 14 Jun 2006 10:55:35 GMT (235kb)
hep-ph/0603042 [abs, ps, pdf, other] :: Title: Extra-Dimensions and Dark Matter
Authors: Francesco Fucito, Andrea Lionetto, Maurizio Prisco
Comments: 37 pages, 17 figures, uses feynmf.sty, two references added
Journal-ref: JCAP 06 (2006) 002
Note: replaced with revised version Wed, 14 Jun 2006 17:16:52 GMT (1464kb)
nucl-th/0602065 [abs, ps, pdf, other] :: Title: Thomson Problem approach to the ground state energy of a system of relativistic Dirac fermions in the unitary limit
Authors: Ji-sheng Chen
Comments: Revised version with typos corrected; updated references added
Subj-class: Nuclear Theory; Statistical Mechanics; Strongly Correlated Electrons; Atomic Physics
Note: replaced with revised version Wed, 14 Jun 2006 03:50:19 GMT (10kb)

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gr-qc/0606041 [abs, ps, pdf, other] :: Title: On asymptotic behavior of anisotropic Dvali-Gabadadze-Porrati branes
Authors: Tsutomu Kobayashi
Comments: 5 pages, 1 figure, accepted for publication in Class. Quantum Grav

The braneworld model of Dvali-Gabadadze-Porrati (DGP) provides an interesting alternative to a positive cosmological constant by modifying gravity at large distances. We investigate the asymptotic behavior of homogeneous and anisotropic cosmologies on the DGP brane. It is shown that all Bianchi models except type IX isotropize, as in general relativity, if the so called $E_{\mu\nu}$ term satisfies some energy condition. Isotropization can proceed slower in DGP gravity than in general relativity.
gr-qc/0606061 [abs, ps, pdf, other] :: Title: Gravity: A New Holographic Perspective
Authors: T. Padmanabhan
Comments: Plenary talk at the International Conference on Einstein's Legacy in the New Millennium, December 15 - 22, 2005, Puri, India; to appear in the Proceedings to be published in IJMPD; 16 pages; no figures

A general paradigm for describing classical (and semiclassical) gravity is presented. This approach brings to the centre-stage a holographic relationship between the bulk and surface terms in a general class of action functionals and provides a deeper insight into several aspects of classical gravity which have no explanation in the conventional approach. After highlighting a series of unresolved issues in the conventional approach to gravity, I show that (i) principle of equivalence, (ii) general covariance and (iii)a reasonable condition on the variation of the action functional, suggest a generic Lagrangian for semiclassical gravity of the form $L=Q_a^{bcd}R^a_{bcd}$ with $\nabla_b Q_a^{bcd}=0$. The expansion of $Q_a^{bcd}$ in terms of the derivatives of the metric tensor determines the structure of the theory uniquely. The zeroth order term gives the Einstein-Hilbert action and the first order correction is given by the Gauss-Bonnet action. Any such Lagrangian can be decomposed into a surface and bulk terms which are related holographically. The equations of motion can be obtained purely from a surface term in the gravity sector. Hence the field equations are invariant under the transformation $T_{ab} \to T_{ab} + \lambda g_{ab}$ and gravity does not respond to the changes in the bulk vacuum energy density. The cosmological constant arises as an integration constant in this approach. The implications are discussed.
hep-ph/0606157 [abs, ps, pdf, other] :: Title: Color Superconductivity in Dense, but not Asymptotically Dense, Quark Matter
Authors: Mark Alford, Krishna Rajagopal
Comments: 37 pages, 7 figures. To appear as a Chapter in "Pairing in Fermionic Systems: Basic Concepts and Modern Applications", published by World Scientific
Subj-class: High Energy Physics - Phenomenology; Superconductivity

At ultra-high density, matter is expected to form a degenerate Fermi gas of quarks in which there is a condensate of Cooper pairs of quarks near the Fermi surface: color superconductivity. In this chapter we review some of the underlying physics, and discuss outstanding questions about the phase structure of ultra-dense quark matter. We then focus on describing recent results on the crystalline color superconducting phase that may be the preferred form of cold, dense but not asymptotically dense, three-flavor quark matter. The gap parameter and free energy for this phase have recently been evaluated within a Ginzburg-Landau approximation for many candidate crystal structures. We describe the two that are most favorable. The robustness of these phases results in their being favored over wide ranges of density. However, it also implies that the Ginzburg-Landau approximation is not quantitatively reliable. We describe qualitative insights into what makes a crystal structure favorable which can be used to winnow the possibilities. We close with a look ahead at the calculations that remain to be done in order to make quantitative contact with observations of compact stars.
physics/0606128 [abs, ps, pdf, other] :: Title: R-matrix calculation of differential cross sections for low-energy electron collisions with ground and electronically excited state O2 molecules
Authors: Motomichi Tashiro, Keiji Morokuma, Jonathan Tennyson
Subj-class: Chemical Physics; Atomic Physics

Differential cross sections for electron collisions with the O$_2$ molecule in its ground ${X}^{3}\Sigma_g^-$ state, as well as excited ${a}^{1}\Delta_g$ and ${b}^{1}\Sigma_g^+$ states are calculated. As previously, the fixed-bond R-matrix method based on state-averaged complete active space SCF orbitals is employed. In additions to elastic scattering of electron with the O$_2$ ${X}^{3}\Sigma_g^-$, ${a}^{1}\Delta_g$ and ${b}^{1}\Sigma_g^+$ states, electron impact excitation from the ${X}^{3}\Sigma_g^-$ state to the ${a}^{1}\Delta_g$ and ${b}^{1}\Sigma_g^+$ states as well as '6 eV states' of ${c}^{1}\Sigma_u^{-}$, ${A'}^{3}\Delta_u$ and ${A}^{3}\Sigma_u^{+}$ states is studied. Differential cross sections for excitation to the '6 eV states' have not been calculated previously. Electron impact excitation to the ${b}^{1}\Sigma_g^+$ state from the metastable ${a}^{1}\Delta_g$ state is also studied. For electron impact excitation from the O$_2$ ${X}^{3}\Sigma_g^-$ state to the ${b}^{1}\Sigma_g^+$ state, our results agree better with the experimental measurements than previous theoretical calculations. Our cross sections show angular behaviour similar to the experimental ones for transitions from the ${X}^{3}\Sigma_g^-$ state to the '6 eV states', although the calculated cross sections are up to a factor two larger at large scattering angles. For the excitation from the ${a}^{1}\Delta_g$ state to the ${b}^{1}\Sigma_g^+$ state, our results marginally agree with the experimental data except for the forward scattering direction.
physics/0606122 [abs, ps, pdf, other] :: Title: Paradox of inductionless magnetorotational instability in a Taylor-Couette flow with a helical magnetic field
Authors: J. Priede, I. Grants, G. Gerbeth
Comments: 4 pages, 3 figures, submitted to Phys. Rev. E
Subj-class: Fluid Dynamics

We consider the magnetorotational instability (MRI) of a hydrodynamically stable Taylor-Couette flow with a helical external magnetic field in the inductionless approximation defined by a zero magnetic Prandtl number ($\Pm=0)$. This leads to a considerable simplification of the problem eventually containing only hydrodynamic variables. First, we point out that the energy of any perturbation growing in the presence of magnetic field has to grow faster without the field. This is a paradox because the base flow is stable without the magnetic while it is unstable in the presence of a helical magnetic field without being modified by the latter as it has been found recently by Hollerbach and Rudiger [Phys. Rev. Lett. 95, 124501 (2005)]. We revisit this problem by using a Chebyshev collocation method to calculate the eigenvalue spectrum of the linearized problem. In this way, we confirm that MRI with helical magnetic field indeed works in the inductionless limit where the destabilization effect appears as an effective shift of the Rayleigh line. Second, we integrate the linearized equations in time to study the transient behavior of small amplitude perturbations, thus showing that the energy arguments are correct as well. However, there is no real contradiction between both facts. The linear stability theory predicts the asymptotic development of an arbitrary small-amplitude perturbation, while the energy stability theory yields the instant growth rate of any particular perturbation, but it does not account for the evolution of this perturbation.
quant-ph/0606117 [abs, ps, pdf, other] :: Title: Charge Detection in a Closed-Loop Aharonov-Bohm Interferometer
Authors: Gyong Luck Khym, Kicheon Kang
Comments: 4 pages with 4 figures
Subj-class: Quantum Physics; Mesoscopic Systems and Quantum Hall Effect

We report on a study of complementarity in a two-terminal "closed-loop" Aharonov-Bohm interferometer. In this interferometer, the simple picture of two-path interference cannot be applied. We introduce a nearby quantum point contact to detect the electron in a quantum dot inserted in the interferometer. We found that charge detection reduces but does not completely suppress the interference even in the limit of perfect detection. We attribute this phenomenon to the unique nature of the closed-loop interferometer. That is, the closed-loop interferometer cannot be simply regarded as a two-path interferometer because of multiple reflections of electrons. As a result, there exist indistinguishable paths of the electron in the interferometer and the interference survives even in the limit of perfect charge detection. This implies that charge detection is not equivalent to path detection in a closed-loop interferometer. We also discuss the phase rigidity of the transmission probability for a two-terminal conductor in the presence of a detector.

Replacements

astro-ph/0505376 [abs, ps, pdf, other] :: Title: Inflationary spectra and violations of Bell inequalities
Authors: David Campo, Renaud Parentani
Comments: 5 pages, 1 figure; new presentation and extended discussion
Note: replaced with revised version Thu, 15 Jun 2006 19:04:59 GMT (16kb)
astro-ph/0603271 [abs, ps, pdf, other] :: Title: Probing the Universe on Gigaparsec Scales with Remote Cosmic Microwave Background Quadrupole Measurements
Authors: Emory F. Bunn
Comments: 12 pages, 7 figures. Correlation with CMB polarization as well as temperature now accounted for. Other changes to match published version
Journal-ref: Phys. Rev. D, 73, 123517 (2006)
Note: replaced with revised version Thu, 15 Jun 2006 16:44:27 GMT (185kb)
astro-ph/0603534 [abs, ps, pdf, other] :: Title: Higher order contributions to the primordial non-gaussianity
Authors: Ignacio Zaballa, Yeinzon Rodriguez, David H. Lyth
Comments: 6 pages. 2 figures. Typos corrected. Version accepted in JCAP
Note: replaced with revised version Thu, 15 Jun 2006 11:29:23 GMT (16kb)
astro-ph/0604228 [abs, ps, pdf, other] :: Title: Note on Redshift Distortion in Fourier Space
Authors: Yan-Chuan Cai (1,2), Jun Pan (1) ((1) Purple Mountain Observatory, China, (2) National Astronomical Observatories, China)
Comments: 15 pages, 8 figures. Accepted for publication in ChJAA
Note: replaced with revised version Thu, 15 Jun 2006 06:12:34 GMT (112kb)
astro-ph/0605052 [abs, ps, pdf, other] :: Title: Formation and evolution of early-type galaxies. II. Models with quasi-cosmological initial conditions
Authors: Emiliano Merlin, Cesare Chiosi (Department of Astronomy - University of Padova)
Comments: 21 pages, 19 figures, 3 tables. To be published on Astronomy & Astrophysics (accepted April 12, 2006)
Note: replaced with revised version Thu, 15 Jun 2006 09:14:32 GMT (416kb)
astro-ph/0606028 [abs, ps, pdf, other] :: Title: Dark matter clustering: a simple renormalization group approach
Authors: Patrick McDonald (CITA)
Comments: added references, clarification; fixed misstatement in discussion of bias; submitted to PRD
Note: replaced with revised version Thu, 15 Jun 2006 15:47:51 GMT (30kb)
astro-ph/0606107 [abs, ps, pdf, other] :: Title: The Sub-parsec Scale Radio Properties of Southern Starburst Galaxies. I. Supernova Remnants, the Supernova Rate, and the Ionised Medium in the NGC 253 Starburst
Authors: Emil Lenc, Steven J. Tingay (Swinburne University)
Comments: Accepted by the Astronomical Journal. 34 pages, 6 figures; fixed typos in assumed expansion velocity
Note: replaced with revised version Thu, 15 Jun 2006 19:05:39 GMT (619kb)
astro-ph/0606223 [abs, ps, pdf, other] :: Title: Galaxy number counts in a presence of the graviton background
Authors: Michael A. Ivanov
Comments: 13 pages, 6 figures, Latex; v2, v3 - technical corrections
Note: replaced with revised version Thu, 15 Jun 2006 06:24:31 GMT (139kb)
astro-ph/0606330 [abs, ps, pdf, other] :: Title: Clustering of K-selected Galaxies at 2<z<3.5: Evidence for a Color-Density Relation
Authors: Ryan Quadri, Pieter van Dokkum, Eric Gawiser, Marijn Franx, Danilo Marchesini, Paulina Lira, Gregory Rudnick, David Herrera, Jose Maza, Mariska Kriek, Ivo Labbe, Harold Francke
Comments: 16 pages in emulateapj style, 14 figures. Submitted to ApJ
Note: replaced with revised version Thu, 15 Jun 2006 03:12:50 GMT (174kb)
gr-qc/0512034 [abs, ps, pdf, other] :: Title: Two Tunnels to Inflation
Authors: Anthony Aguirre, Matthew C. Johnson
Comments: 16 PRD-style pages, 13 figures. PRD, in press. Revised to match published version
Note: replaced with revised version Thu, 15 Jun 2006 18:35:47 GMT (969kb)
hep-ph/0603033 [abs, ps, pdf, other] :: Title: Damping of supernova neutrino transitions in stochastic shock-wave density profiles
Authors: G.L. Fogli, E. Lisi, A. Mirizzi (U. of Bari & INFN, Bari), D. Montanino (U. of Lecce & INFN, Lecce)
Comments: v2 (23 pages, including 6 eps figures). Typos removed, references updated, matches the published version
Journal-ref: JCAP 06 (2006) 012
Note: replaced with revised version Thu, 15 Jun 2006 14:52:36 GMT (204kb)

For subscribe options to combined physics archives,
e-mail To: physics@arXiv.org, Subject: subscribe
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