Cross-listings

cond-mat/0603804 [abs, ps, pdf, other] :: Title: Surface Tension and the Cosmological Constant
Authors: Joseph Samuel, Supurna Sinha
Comments: Dedicated to Rafael Sorkin on his 60th birthday
Subj-class: Soft Condensed Matter

The astronomically observed value of the cosmological constant is small but non-zero. This raises two questions together known as the cosmological constant problem a) why is lambda so nearly zero? b) why is lambda not EXACTLY zero? Sorkin has proposed that b) can be naturally explained as a one by square root N fluctuation by invoking discreteness of spacetime at the Planck scale due to quantum gravity. In this paper we shed light on these questions by developing an analogy between the cosmological constant and the surface tension of membranes. The ``cosmological constant problem'' has a natural analogue in the membrane context: the vanishingly small surface tension of fluid membranes provides an example where question a) above arises and is answered. We go on to find a direct analogue of Sorkin's proposal for answering question b) in the membrane context, where the discreteness of spacetime translates into the molecular structure of matter. We propose analogue experiments to probe a small and fluctuating surface tension in fluid membranes. A counterpart of dimensional reduction a la Kaluza-Klein and large extra dimensions also appears in the physics of fluid membranes.
hep-ph/0603246 [abs, ps, pdf, other] :: Title: Baryogenesis, Electric Dipole Moments and Dark Matter in the MSSM
Authors: Vincenzo Cirigliano, Stefano Profumo, Michael J. Ramsey-Musolf
Comments: 31 pages, 10 figures

We study the implications for electroweak baryogenesis (EWB) within the minimal supersymmetric Standard Model (MSSM) of present and future searches for the permanent electric dipole moment (EDM) of the electron, for neutralino dark matter, and for supersymmetric particles at high energy colliders. We show that there exist regions of the MSSM parameter space that are consistent with both present two-loop EDM limits and the relic density and that allow for successful EWB through resonant chargino and neutralino processes at the electroweak phase transition. We also show that under certain conditions the lightest neutralino may be simultaneously responsible for both the baryon asymmetry and relic density. We give present constraints on chargino/neutralino-induced EWB implied by the flux of energetic neutrinos from the Sun, the prospective constraints from future neutrino telescopes and ton-sized direct detection experiments, and the possible signatures at the Large Hadron Collider and International Linear Collider.
hep-th/0603244 [abs, ps, pdf, other] :: Title: Brane-world cosmology with black strings
Authors: László Á. Gergely
Comments: 5 pages, 4 figures

We consider the simplest scenario when black strings (cigars) penetrate the cosmological brane. As a result, the brane has a Swiss-cheese structure, with Schwarzschild black holes immersed in a Friedmann-Lema\^{\i}tre-Robertson-Walker brane. There is no dark radiation in the model, the cosmological regions of the brane are characterized by a cosmological constant $\Lambda$ and flat spatial sections. Regardless of the value of $\Lambda$, these brane-world universes forever expand and forever decelerate. The totality of source terms in the modified Einstein equation sum up to a dust, establishing a formal equivalence with the general relativistic Einstein-Straus model. However in this brane-world scenario with black strings the evolution of the cosmological fluid strongly depends on $\Lambda$. For $\Lambda$ less or equal to zero it has positive energy density $\rho$ and negative pressure $p$ and at late times it behaves as in the Einstein-Straus model. For (not too high) positive values of $\Lambda$ the cosmological evolution begins with positive $\rho $ and negative $p$, but this is followed by an epoch with both $\rho $ and $p$ positive. Eventually, $\rho $ becomes negative, while $p$ stays positive. A similar evolution is present for high positive values of $\Lambda$, however in this case the evolution ends in a pressure singularity, accompanied by a regular behaviour of the cosmic acceleration. This is a novel type of singularity appearing in brane-worlds.
nlin.CD/0603070 [abs, ps, pdf, other] :: Title: Beyond scaling and locality in turbulence
Authors: A. Bershadskii
Subj-class: Chaotic Dynamics; Statistical Mechanics

An analytic perturbation theory is suggested in order to find finite-size corrections to the scaling power laws. In the frames of this theory it is shown that the first order finite-size correction to the scaling power laws has following form $S(r) \cong cr^{\alpha_0}[\ln(r/\eta)]^{\alpha_1}$, where $\eta$ is a finite-size scale (in particular for turbulence, it can be the Kolmogorov dissipation scale). Using data of laboratory experiments and numerical simulations it is shown shown that a degenerated case with $\alpha_0 =0$ can describe turbulence statistics in the near-dissipation range $r > \eta$, where the ordinary (power-law) scaling does not apply. For moderate Reynolds numbers the degenerated scaling range covers almost the entire range of scales (about two decades) of velocity structure functions. Interplay between local and non-local regimes has been considered as a possible hydrodynamic mechanism providing basis for the degenerated scaling of the structure functions and the extended self-similarity.

Replacements

astro-ph/0508655 [abs, ps, pdf, other] :: Title: X-ray observations of RX J0822-4300 and Puppis-A
Authors: C. Y. Hui, W. Becker (MPE)
Comments: Accepted by A&A, 20 pages, 10 figures, 3 tables
Note: replaced with revised version Fri, 31 Mar 2006 11:55:28 GMT (590kb)
astro-ph/0509676 [abs, ps, pdf, other] :: Title: Dynamics and Non-Gaussianity in the Weak-Dissipative Warm Inflation Scenario
Authors: Sujata Gupta
Comments: Replaced with version accepted for publication in Phys. Rev. D., minor changes; 7 pages, LateX
Note: replaced with revised version Fri, 31 Mar 2006 18:17:31 GMT (16kb)
astro-ph/0510109 [abs, ps, pdf, other] :: Title: Trojan pairs in the HD 128311 and HD 82943 planetary systems?
Authors: Krzysztof Gozdziewski, Maciej Konacki
Comments: 18 pages (total), 17 figures in low resolution format suitable for arXiv, revised version resubmitted to ApJ. The preprint with high resolution images is available from this http URL
Note: replaced with revised version Fri, 31 Mar 2006 03:13:12 GMT (557kb)
astro-ph/0511761 [abs, ps, pdf, other] :: Title: Space-VLBI Polarimetry of the BL Lac Object S5 0716+714: Rapid Polarization Variability in the VLBI core
Authors: U. Bach (1,2), T.P. Krichbaum (1), A. Kraus (1), A. Witzel (1), J.A. Zensus (1) ((1) MPIfR, Bonn, Germany; (2) INAF-OATo, Pino Torinese, Italy)
Comments: 15 pages, 10 figures, A&A in press, minor language editing to match the final version
Note: replaced with revised version Fri, 31 Mar 2006 09:14:04 GMT (379kb)
astro-ph/0512211 [abs, ps, pdf, other] :: Title: On The Nature of the Compact Dark Mass at the Galactic Center
Authors: Avery E. Broderick (1), Ramesh Narayan (1,2) ((1) Institute for Theory and Computation, (2) Harvard University)
Comments: 6 pages, 2 figures, submitted to ApJ Letters
Journal-ref: Astrophys.J. 638 (2006) L21-L24
Note: replaced with revised version Fri, 31 Mar 2006 17:34:45 GMT (431kb)
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, submitted to ApJ. Added 4 new figures and updated many; extended text. No conclusions change
Note: replaced with revised version Fri, 31 Mar 2006 14:11:04 GMT (974kb)
astro-ph/0602068 [abs, ps, pdf, other] :: Title: Gamma-ray emission expected from Kepler's SNR
Authors: E.G.Berezhko, L.T.Ksenofontov, H.J.Voelk
Comments: 6 pages, 4 figures. Accepted for publication in Astronomy and Astrophysics, minor typos corrected
Note: replaced with revised version Fri, 31 Mar 2006 07:38:07 GMT (39kb)
astro-ph/0602491 [abs, ps, pdf, other] :: Title: What can we learn about dark energy evolution?
Authors: Marian Douspis (LATT, IAS), Yves Zolnierowski (LAPP), Alain Blanchard (LATT), Alain Riazuelo (IAP)
Comments: Submitted to Astronomy and Astrophysics; new version: last paragraph numbers corrected, conclusion unchanged
Note: replaced with revised version Fri, 31 Mar 2006 15:05:50 GMT (193kb)
astro-ph/0603316 [abs, ps, pdf, other] :: Title: Anomalous extinction behaviour towards the Type Ia SN 2003cg
Authors: N. Elias-Rosa, S. Benetti, E. Cappellaro, M. Turatto, P. A. Mazzali, F. Patat, W. P. S. Meikle, M. Stehle, A. Pastorello, G. Pignata, R. Kotak, A. Harutyunyan, G. Altavilla, H. Navasardyan, Y. Qiu, M. E. Salvo, W. Hillebrandt
Comments: 28 pages, 21 figures. Accepted for publication in MNRAS. Minor changes following the referee suggestions
Note: replaced with revised version Fri, 31 Mar 2006 13:40:04 GMT (692kb)
astro-ph/0603601 [abs, ps, pdf, other] :: Title: Early and Late Transient Cosmic Acceleration due to Curvature Inspired Dark Energy
Authors: S.K.Srivastava
Comments: 9 pages
Note: replaced with revised version Fri, 31 Mar 2006 10:56:50 GMT (6kb)
astro-ph/0603688 [abs, ps, pdf, other] :: Title: The NOAO Fundamental Plane Survey - III. Variations in the stellar populations of red-sequence galaxies from the cluster core to the virial radius
Authors: Russell J. Smith (Waterloo, Durham), Michael J. Hudson (Waterloo), John R. Lucey (Durham), Jenica E. Nelan (Dartmouth, Yale), Gary A. Wegner (Dartmouth)
Comments: Twenty pages, thirteen figures; accepted by MNRAS; corrected labels to left-hand panel of Figure 7
Note: replaced with revised version Fri, 31 Mar 2006 08:16:45 GMT (185kb)
astro-ph/0603729 [abs, ps, pdf, other] :: Title: Nearby debris disk systems with high fractional luminosity reconsidered
Authors: A. Moor, P. Abraham, A. Derekas, Cs. Kiss, L.L. Kiss, D. Apai, C. Grady, Th. Henning
Comments: 47 pages, 6 figures, AASTeX preprint (accepted for publication in the Astrophysical Journal); refined the text parts of table 6 and 7
Note: replaced with revised version Fri, 31 Mar 2006 14:58:35 GMT (77kb)
astro-ph/0603786 [abs, ps, pdf, other] :: Title: Influence of dark energy on the dynamical age of the universe
Authors: Vinod B. Johri, P. K. Rath
Comments: 14 pages, 2 figures
Note: replaced with revised version Fri, 31 Mar 2006 07:09:33 GMT (11kb)
astro-ph/0603792 [abs, ps, pdf, other] :: Title: Dwarf galaxies in the Dynamically Evolved NGC 1407 Group
Authors: Neil Trentham (University of Cambridge), R. Brent Tully (University of Hawaii), Andisheh Mahdavi (University of Victoria)
Comments: accepted for publication in MNRAS, URL for data included
Note: replaced with revised version Fri, 31 Mar 2006 14:39:14 GMT (418kb)
astro-ph/0603830 [abs, ps, pdf, other] :: Title: Coleman-Weinberg Potential In Good Agreement With WMAP
Authors: Q. Shafi, V. N. Senoguz
Comments: 6 pages, 1 table. v2: minor corrections, results unchanged
Note: replaced with revised version Fri, 31 Mar 2006 18:26:14 GMT (8kb)
gr-qc/0511061 [abs, ps, pdf, other] :: Title: Post-Newtonian corrections to the motion of spinning bodies in NRGR
Authors: Rafael A. Porto
Comments: 18 pages, 9 figures. Typos corrected, to appear in Physical Review D
Note: replaced with revised version Fri, 31 Mar 2006 20:22:58 GMT (65kb)
hep-th/0601213 [abs, ps, pdf, other] :: Title: Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
Authors: S. Nojiri, S.D. Odintsov
Comments: LaTeX file, 21 pages, references are added, lectures for 42 Karpacz Winter School on Theor Physics
Note: replaced with revised version Fri, 31 Mar 2006 03:39:12 GMT (28kb)
hep-th/0602136 [abs, ps, pdf, other] :: Title: Heating in Brane Inflation and Hidden Dark Matter
Authors: Xingang Chen, S.-H. Henry Tye
Comments: 52 pages; v2, comments added
Note: replaced with revised version Fri, 31 Mar 2006 20:40:56 GMT (73kb)

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Cross-listings

gr-qc/0603101 [abs, ps, pdf, other] :: Title: Gravitational magnetic monopoles and Majumdar-Papapetrou stars
Authors: Jose' P. S. Lemos, Vilson T. Zanchin
Comments: 38 pages,9 Figures, minor changes

A large amount of work has been dedicated to studying general relativity coupled to non-Abelian Yang-Mills type theories. It has been shown that the magnetic monopole, a solution of the Yang-Mills-Higgs equations can be coupled to gravitation. For a low Higgs mass there are regular solutions, and for a sufficiently massive monopole the system develops an extremal magnetic Reissner-Nordstrom quasi-horizon. These solutions, called quasi-black holes, although non-singular, are arbitrarily close to having a horizon. However, at the critical value the quasi-black hole turns into a degenerate spacetime. On the other hand, for a high Higgs mass, a sufficiently massive monopole develops also a quasi-black hole, but it turns into an extremal true horizon, with matter fields outside. One can also put a small Schwarzschild black hole inside the magnetic monopole, an example of a non-Abelian black hole. Surprisingly, Majumdar-Papapetrou systems, Abelian systems constructed from extremal dust, also show a resembling behavior. Previously, we have reported that one can find Majumdar-Papapetrou solutions which can be arbitrarily close of being a black hole, displaying quasi-black hole behavior. With the aim of better understanding the similarities between gravitational monopoles and Majumdar-Papapetrou systems, we study a system composed of two extremal electrically charged spherical shells (or stars, generically) in the Einstein--Maxwell--Majumdar-Papapetrou theory. We review the gravitational properties of the monopoles, and compare with the properties of the double extremal electric shell system. These quasi-black holes can help in the understanding of true black holes, and can give insight into the nature of the entropy of black holes in the form of entanglement.
gr-qc/0603129 [abs, ps, pdf, other] :: Title: Networks of cosmological histories, crossing of the phantom divide line and potentials with cusps
Authors: Francesco Cannata, Alexander Y. Kamenshchik

We discuss the phenomenon of the smooth dynamical gravity induced crossing of the phantom divide line in a framework of simple cosmological models where it appears to occur rather naturally, provided the potential of the unique scalar field has some kind of cusp. The behavior of cosmological trajectories in the vicinity of the cusp is studied in some detail and a simple mechanical analogy is presented. The phenomenon of certain complementarity between the smoothness of the spacetime geometry and matter equations of motion is elucidated. We introduce a network of cosmological histories and qualitatively describe some of its properties.
gr-qc/0603131 [abs, ps, pdf, other] :: Title: Cosmo-dynamics and dark energy with a quadratic EoS: anisotropic models, large-scale perturbations and cosmological singularities
Authors: Kishore N. Ananda, Marco Bruni (ICG, Portsmouth)
Comments: 16 pages, 6 figures

In general relativity, for fluids with a linear equation of state (EoS) or scalar fields, the high isotropy of the universe requires special initial conditions, and singularities are anisotropic in general. In the brane world scenario anisotropy at the singularity is suppressed by an effective quadratic equation of state. There is no reason why the effective EoS of matter should be linear at the highest energies, and a non-linear EoS may describe dark energy or unified dark matter (Paper I, astro-ph/0512224). In view of this, here we study the effects of a quadratic EoS in homogenous and inhomogeneous cosmological models in general relativity, in order to understand if in this context the quadratic EoS can isotropize the universe at early times. With respect to Paper I, here we use the simplified EoS P=alpha rho + rho^2/rho_c, which still allows for an effective cosmological constant and phantom behavior, and is general enough to analyze the dynamics at high energies. We first study anisotropic Bianchi I and V models, focusing on singularities. Using dynamical systems methods, we find the fixed points of the system and study their stability. We find that models with standard non-phantom behavior are in general asymptotic in the past to an isotropic fixed point IS, i.e. in these models even an arbitrarily large anisotropy is suppressed in the past: the singularity is matter dominated. Using covariant and gauge invariant variables, we then study linear perturbations about the homogenous and isotropic spatially flat models with a quadratic EoS. We find that, in the large scale limit, all perturbations decay asymptotically in the past, indicating that the isotropic fixed point IS is the general asymptotic past attractor for non phantom inhomogeneous models with a quadratic EoS. (Abridged)
hep-th/0603254 [abs, ps, pdf, other] :: Title: Black holes and dark energy from gravitational collapse on the brane
Authors: László Á. Gergely
Comments: 5 pages, 2 figures

The gravitational collapse of a pressureless fluid in general relativity (Oppenheimer-Snyder collapse) results in a black hole. The study of the same phenomenon in the brane-world scenario has shown that the exterior of the collapsing dust sphere cannot be static. By allowing for pressure, we show that the exterior of a fluid sphere can be static. The gravitational collapse on the brane proceeds according to the modified gravitational dynamics, turning the initial nearly dust-like configuration into a fluid with tensions. These tensions represent the response of the brane to the streching effect of the collapse and they behave like dark energy. This behaviour is proper to brane-worlds, the tensions vanish in the general relativistic limit. In the gravitational collapse on the brane both the energy density and the tension increase towards infinite values. The infinite tensions however could not stop the formation of the brane black hole.
nucl-th/0603073 [abs, ps, pdf, other] :: Title: High density behaviour of nuclear symmetry energy
Authors: D.N. Basu, Tapan Mukhopadhyay
Comments: 9 pages including 3 figures

Role of the isospin asymmetry in nuclei and neutron stars, with an emphasis on the density dependence of the nuclear symmetry energy, is discussed. The symmetry energy is obtained using the isoscalar as well as isovector components of the density dependent M3Y effective interaction. The constants of density dependence of the effective interaction are obtained by reproducing the saturation energy per nucleon and the saturation density of spin and isospin symmetric cold infinite nuclear matter. Implications for the density dependence of the symmetry energy in case of a neutron star are discussed, and also possible constraints on the density dependence obtained from finite nuclei are compared.

Replacements

astro-ph/0412232 [abs, ps, pdf, other] :: Title: Outliers to the Isotropic Energy - Peak Energy Relation in GRBs
Authors: Ehud Nakar, Tsvi Piran
Journal-ref: Mon.Not.Roy.Astron.Soc., Lett, 360 (2005), L73
Note: replaced with revised version Sat, 1 Apr 2006 04:21:16 GMT (49kb)
astro-ph/0505602 [abs, ps, pdf, other] :: Title: Scalar Dark Matter and Cold Stars
Authors: J. A. Grifols (IFAE, Uab)
Comments: revised version to match published paper
Journal-ref: Astropart.Phys. 25 (2006) 98-105
Note: replaced with revised version Mon, 3 Apr 2006 15:07:18 GMT (154kb)
astro-ph/0511165 [abs, ps, pdf, other] :: Title: Dynamical Expansion of Ionization and Dissociation Front around a Massive Star. II. On the Generality of Triggered Star Formation
Authors: Takashi Hosokawa (NAOJ), Shu-ichiro Inutsuka (Kyoto Univ.)
Comments: 49 pages, including 17 figures ; Accepted for publication in ApJ
Note: replaced with revised version Mon, 3 Apr 2006 12:30:37 GMT (322kb)
astro-ph/0511410 [abs, ps, pdf, other] :: Title: Cosmological Signatures of Interacting Neutrinos
Authors: Nicole F. Bell (Caltech), Elena Pierpaoli (Caltech), Kris Sigurdson (Caltech and IAS)
Comments: 17 pages, 14 figures, minor changes and references added, published in Phys. Rev. D
Journal-ref: Phys.Rev. D73 (2006) 063523
Note: replaced with revised version Sat, 1 Apr 2006 01:01:51 GMT (228kb)
astro-ph/0512608 [abs, ps, pdf, other] :: Title: The origin and evolution of cluster magnetism
Authors: A. Shukurov (Newcastle), K. Subramanian (IUCAA), N. E. L. Haugen (Trondheim)
Comments: 4 pages, 1 figure, to be published by Astronomische Nachrichten (proceedings of "The Origin and Evolution of Cosmic Magnetism", 29 August - 2 September 2005, Bologna, Italy); version updated to match the accepted text
Journal-ref: Astronomische Nachrichten, 327, No. 5/6, 583-586 (2006)
Note: replaced with revised version Sun, 2 Apr 2006 11:52:01 GMT (357kb)
astro-ph/0601310 [abs, src] :: Title: Dispersion relation for electromagnetic wave propagation in a strongly magnetized plasma
Authors: G. Brodin M. Marklund, L. Stenflo, P.K. Shukla
Comments: 6 pages, 1 figure, to appear in New Journal of Physics
Note: replaced with revised version Mon, 3 Apr 2006 18:09:15 GMT (0kb,I)
astro-ph/0601453 [abs, ps, pdf, other] :: Title: Observational constraints on the acceleration of the Universe
Authors: Yungui Gong, Anzhong Wang
Comments: 5 figures, revtex, accepted for publication in Phys Rev D
Note: replaced with revised version Fri, 31 Mar 2006 22:37:20 GMT (23kb)
astro-ph/0602388 [abs, ps, pdf, other] :: Title: Constraints on Galactic Intermediate Mass Black Holes
Authors: M. Mapelli (1), A. Ferrara (1), N. Rea (2), ((1) SISSA, (2) SRON-Utrecht)
Comments: 12 pages, 5 figures; MNRAS, in press
Note: replaced with revised version Sun, 2 Apr 2006 12:52:53 GMT (114kb)
astro-ph/0602452 [abs, ps, pdf, other] :: Title: Study of multiscale density fluctuation measurements
Authors: N.P. Basse
Comments: 11 pages, 3 figures
Subj-class: Astrophysics; Plasma Physics
Note: replaced with revised version Sun, 2 Apr 2006 12:45:08 GMT (256kb)
astro-ph/0603237 [abs, ps, pdf, other] :: Title: Impact of dark matter decays and annihilations on reionization
Authors: M. Mapelli (1), A. Ferrara (1), E. Pierpaoli (2), ((1) SISSA, (2) Caltech)
Comments: 6 pages, 5 figures, accepted for publication in MNRAS
Note: replaced with revised version Sun, 2 Apr 2006 13:18:05 GMT (53kb)
astro-ph/0603545 [abs, ps, pdf, other] :: Title: Dark matter, and its darkness
Authors: D. V. Ahluwalia-Khalilova
Comments: 12 pages, added important references
Note: replaced with revised version Sun, 2 Apr 2006 02:13:05 GMT (290kb)
astro-ph/0603587 [abs, ps, pdf, other] :: Title: Recovering the Inflationary Potential and Primordial Power Spectrum With a Slow Roll Prior
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
Note: replaced with revised version Fri, 31 Mar 2006 21:08:58 GMT (369kb)
astro-ph/0603753 [abs, ps, pdf, other] :: Title: Observational constraints and cosmological parameters
Authors: Antony Lewis
Comments: Corrected Lyman-alpha results; Contribution to Rencontres de Moriond: Contents and Structures of the Universe, March 18-25, 2006, La Thuile
Note: replaced with revised version Sun, 2 Apr 2006 21:23:57 GMT (109kb)
astro-ph/0603789 [abs, ps, pdf, other] :: Title: Magnetorotational supernovae with jets
Authors: S.G.Moiseenko, G.S.Bisnovatyi-Kogan, N.V.Ardeljan
Comments: 13 pages, 22 figures, submitted to journal
Note: replaced with revised version Mon, 3 Apr 2006 06:11:37 GMT (903kb)
astro-ph/0603791 [abs, ps, pdf, other] :: Title: Van Stockum -- Bonnor class of asymptotically flat space-times
Authors: Lukasz Bratek, Joanna Jalocha, Marek Kutschera
Comments: in version 2: corrected typos in equations + some language corrections figures too large, available (via e-mail: lukasz.bratek@ifj.edu.pl)
Note: replaced with revised version Sat, 1 Apr 2006 11:03:54 GMT (17kb)
astro-ph/0603801 [abs, ps, pdf, other] :: Title: From Supermassive Black Holes to Dwarf Elliptical Nuclei: a Mass Continuum
Authors: Elizabeth Wehner, William Harris (McMaster University)
Comments: 4 pages, 2 figures, submitted to ApJL
Note: replaced with revised version Mon, 3 Apr 2006 17:13:44 GMT (32kb)
gr-qc/0505096 [abs, ps, pdf, other] :: Title: Dual interacting cosmologies and late accelerated expansion
Authors: Luis P. Chimento, Diego Pavon
Comments: 13 pages, 1 figura, version to match published article
Journal-ref: Phys.Rev. D73 (2006) 063511
Note: replaced with revised version Mon, 3 Apr 2006 14:43:28 GMT (13kb)
gr-qc/0601055 [abs, ps, pdf, other] :: Title: What do the orbital motions of the outer planets of the Solar System tell us about the Pioneer anomaly?
Authors: Lorenzo Iorio, Giuseppe Giudice
Comments: Latex2e, 19 pages, 3 tables, 10 figures, 18 references. Authorship changed; new figures added for a direct comparison with the observable quantities. Accepted for publication in New Astronomy
Subj-class: General Relativity and Quantum Cosmology; Space Physics
Note: replaced with revised version Sat, 1 Apr 2006 15:06:33 GMT (79kb)
hep-ph/0509064 [abs, ps, pdf, other] :: Title: Dark matter production from cosmic necklaces
Authors: Tomohiro Matsuda
Comments: 27 pages, 5 figures, added many comments and 3 figures, accepted for publication in JCAP
Note: replaced with revised version Sun, 2 Apr 2006 05:28:12 GMT (113kb)
physics/0508173 [abs, ps, pdf, other] :: Title: Inertial Range Scaling, Karman-Howarth Theorem and Intermittency for Forced and Decaying Lagrangian Averaged MHD in 2D
Authors: J. Pietarila Graham, D. D. Holm, P. Mininni, A. Pouquet
Comments: 34 pages, 7 figures author institution addresses added magnetic Prandtl number stated clearly
Subj-class: Fluid Dynamics; Astrophysics; Chaotic Dynamics; Plasma Physics
Note: replaced with revised version Mon, 3 Apr 2006 19:48:34 GMT (105kb)

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gr-qc/0604006 [abs, ps, pdf, other] :: Title: Metric-affine f(R) theories of gravity
Authors: Thomas P. Sotiriou, Stefano Liberati

General Relativity assumes that spacetime is fully described by the metric alone. An alternative is the so called Palatini formalism where the metric and the connections are taken as independent quantities. The metric-affine theory of gravity has attracted considerable attention recently, since it was shown that within this framework some cosmological models, based on some generalized gravitational actions, can account for the current accelerated expansion of the universe. However we think that metric-affine gravity deserves much more attention than that related to cosmological applications and so we consider here metric-affine gravity theories in which the gravitational action is a general function of the scalar curvature while the matter action is allowed to depend also on the connection which is not {\em a priori} symmetric. This general treatment will allow us to address several open issues such as: the relation between metric-affine $f(R)$ gravity and General Relativity (in vacuum as well as in the presence of matter), the implications of the dependence (or independence) of the matter action on the connections, the origin and role of torsion and the viability of the minimal-coupling principle.
hep-ph/0603265 [abs, ps, pdf, other] :: Title: Gravitino Overproduction in Inflaton Decay
Authors: Masahiro Kawasaki, Fuminobu Takahashi, T. T. Yanagida
Comments: 13 pages, 1 figure

Most of the inflation models end up with non-vanishing vacuum expectation values of the inflaton fields \phi in the true vacuum, which induce, in general, nonvanishing auxiliary field G_\phi for the inflaton potential in supergravity. We show that the presence of nonzero G_\phi gives rise to inflaton decay into a pair of the gravitinos and are thereby severely constrained by cosmology. For several inflation models, we explicitly calculate the values of G_\phi and find that most of them are excluded or on the verge of being excluded. We conclude that an inflation model with vanishing G_\phi, typically realized in a chaotic inflation, is favored in a sense that it naturally avoids the potential gravitino overproduction problem.
hep-ph/0604014 [abs, ps, pdf, other] :: Title: Dark energy and formation of classical scalar fields
Authors: Houri Ziaeepour
Comments: 7 pages,2 figures. Proceedings of Einstein 2005 Conference

We present a quintessence model for the dark energy in which the quintessence scalar field is produced by the decay of a super heavy dark matter and gradually condensate to a classical scalar field. This model can explain both the smallness and the latest observations by WMAP for the equation of state of the dark energy which has $w \sim -1.06$. We review both classical and field theoretical treatment of this model and briefly explain the most important parameters for obtaining the observed characteristic of the dark energy.
hep-th/0602032 [abs, ps, pdf, other] :: Title: High-energy effective theory for orbifold branes
Authors: Tetsuya Shiromizu, Shunsuke Fujii, Claudia de Rham, Hirotaka Yoshino
Comments: 4 pages, accepted for publication in Phys. Rev. D

We derive an effective theory on the orbifold branes of the Randall-Sundrum 1 (RS1) braneworld scenario in the presence of a bulk brane. We concentrate on the regime where the three branes are close and consider a scenario where the bulk brane collides with one of the orbifold branes. This theory allows us to understand the corrections to a low-energy approach due to the presence of higher velocity terms, coming from the Kaluza-Klein modes. We consider the evolution of gravitational waves on a cosmological background and find that, within the large velocity limit, the boundary branes recover a purely four-dimensional behavior.
hep-th/0604014 [abs, ps, pdf, other] :: Title: Late acceleration and $w=-1$ crossing in induced gravity
Authors: Pantelis S. Apostolopoulos, Nikolaos Tetradis
Comments: 7 pages, no figures, RevTex 4.0

We study the cosmological evolution on a brane with induced gravity within a bulk with arbitrary matter content. We consider a Friedmann-Robertson-Walker brane, invariantly characterized by a six-dimensional group of isometries. We derive the effective Friedmann and Raychaudhuri equations. We show that the Hubble expansion rate on the brane depends on the covariantly defined integrated mass in the bulk, which determines the energy density of the generalized dark radiation. The Friedmann equation has two branches, distinguished by the two possible values of the parameter $\ex=\pm 1$. The branch with $\ex=1$ is characterized by an effective cosmological constant and accelerated expansion for low energy densities. Another remarkable feature is that the contribution from the generalized dark radiation appears with a negative sign. As a result, the presence of the bulk corresponds to an effective negative energy density on the brane, without violation of the weak energy condition. The transition from a period of domination of the matter energy density by non-relativistic brane matter to domination by the generalized dark radiation corresponds to a crossing of the phantom divide $w=-1$.

Replacements

astro-ph/0509082 [abs, ps, pdf, other] :: Title: Observational Constraints on a Variable Dark Energy Model
Authors: M. Sadegh Movahed, Sohrab Rahvar
Comments: 10 pages, 12 figures, accepted in PRD
Note: replaced with revised version Tue, 4 Apr 2006 08:59:00 GMT (373kb)
astro-ph/0509159 [abs, ps, pdf, other] :: Title: Tail Emission of Prompt Gamma-Ray Burst Jets
Authors: Ryo Yamazaki (1,2), Kenji Toma (3), Kunihito Ioka (3), Takashi Nakamura (3) ((1) Osaka University, (2) Hiroshima University, (3) Kyoto University)
Comments: 6 pages, 6 figures, MNRAS in press
Note: replaced with revised version Tue, 4 Apr 2006 03:41:25 GMT (74kb)
astro-ph/0511578 [abs, ps, pdf, other] :: Title: Semi-empirical analysis of Sloan Digital Sky Survey galaxies: II. The bimodality of the galaxy population revisited
Authors: Abilio Mateus (1), Laerte Sodre Jr. (1), Roberto Cid Fernandes (2), Grazyna Stasinska (3), William Schoenell (2), Jean M. Gomes (2) ((1) IAG-USP, Brazil (2) UFSC, Brazil (3) LUTH, Observatoire de Meudon, France)
Comments: 18 pages, 19 figures, accepted for publication in MNRAS
Note: replaced with revised version Tue, 4 Apr 2006 15:07:20 GMT (587kb)
astro-ph/0512349 [abs, ps, pdf, other] :: Title: Determination of the Cosmic Distance Scale from Sunyaev-Zel'dovich Effect and Chandra X-ray Measurements of High Redshift Galaxy Clusters
Authors: M. Bonamente, M. Joy, S. La Roque, J. Carlstrom, E. Reese, K. Dawson
Comments: ApJ submitted (revised version)
Note: replaced with revised version Mon, 3 Apr 2006 22:51:53 GMT (851kb)
astro-ph/0512572 [abs, ps, pdf, other] :: Title: Hydrogen and helium traces in type Ib-c supernovae
Authors: A. Elmhamdi, I.J. Danziger, D. Branch, B. Leibundgut, E. Baron, R.P. Kirshner
Comments: 26 pages, 37 figures, 2 tables. Published in Astronomy and Astrophysics (Volume 450, Page 305); Title changed
Note: replaced with revised version Tue, 4 Apr 2006 14:28:06 GMT (468kb)
astro-ph/0601101 [abs, ps, pdf, other] :: Title: A Short Hard X-ray Flare from the Blazar NRAO 530 Observed by INTEGRAL
Authors: L. Foschini, E. Pian, L. Maraschi, C.M. Raiteri, F. Tavecchio, G. Ghisellini, G. Tosti, G. Malaguti, G. Di Cocco
Comments: 5 pages, 4 figures. Accepted for publication on A&A Main Journal. Note added in proof
Journal-ref: A&A, 450, (2006), 77
Note: replaced with revised version Tue, 4 Apr 2006 09:47:19 GMT (562kb)
astro-ph/0602356 [abs, ps, pdf, other] :: Title: Retroduction, Multiverse Hypotheses and Their Testability
Authors: William R. Stoeger
Comments: 12 PAGES, 0 FIGURES
Note: replaced with revised version Tue, 4 Apr 2006 17:50:00 GMT (10kb)
astro-ph/0603012 [abs, ps, pdf, other] :: Title: Why the braking indices of young pulsars are less than 3?
Authors: W. C. Chen, X. D. Li
Comments: 4 pages, 3 figures, accepted for publication in A&A Letters
Journal-ref: Astron.Astrophys. 450 (2006) L1-L4
Note: replaced with revised version Tue, 4 Apr 2006 06:43:22 GMT (94kb)
astro-ph/0603165 [abs, ps, pdf, other] :: Title: The GL 569 Multiple System
Authors: M. Simon (1), C. Bender (1), L. Prato (2) ((1) SUNY Stony Brook, (2) Lowell Obs.)
Comments: 29 pages, 10 figures, accepted for publication in the Astrophysical Journal; minor corrections to Section 5.1; changed typo in 6.D
Note: replaced with revised version Tue, 4 Apr 2006 02:28:19 GMT (60kb)
astro-ph/0603206 [abs, ps, pdf, other] :: Title: Cosmological Parameters and Cosmic Topology
Authors: M.J. Reboucas (CBPF), J.S. Alcaniz (Observatorio Nacional)
Comments: 6 pages, 3 figures, to appear in MNRAS
Note: replaced with revised version Tue, 4 Apr 2006 12:40:04 GMT (47kb)
astro-ph/0603268 [abs, ps, pdf, other] :: Title: XMM-Newton observations of a sample of gamma-ray loud active galactic nuclei
Authors: L. Foschini, G. Ghisellini, C.M. Raiteri, F. Tavecchio, M. Villata, L. Maraschi, E. Pian, G. Tagliaferri, G. Di Cocco, G. Malaguti
Comments: 13 pages + 12 pages of on-line material; 6 figures, 12 Tables. Accepted for publication on A&A Main Journal. Revision of English grammar
Note: replaced with revised version Tue, 4 Apr 2006 09:51:45 GMT (108kb)
astro-ph/0603799 [abs, ps, pdf, other] :: Title: Non-Gaussianities in two-field inflation
Authors: Filippo Vernizzi, David Wands
Comments: 28 pages, 6 figures. v2, comparison with previous estimates
Note: replaced with revised version Tue, 4 Apr 2006 13:00:16 GMT (140kb)
hep-ph/0603057 [abs, ps, pdf, other] :: Title: New Regions for a Chameleon to Hide
Authors: Baruch Feldman, Ann E. Nelson
Comments: 17 pages, 1 figure,refs added, equation typos corrected, conclusions unchanged
Note: replaced with revised version Mon, 3 Apr 2006 21:20:59 GMT (93kb)
hep-th/0506212 [abs, ps, pdf, other] :: Title: Unifying phantom inflation with late-time acceleration: scalar phantom-non-phantom transition model and generalized holographic dark energy
Authors: Shin'ichi Nojiri, Sergei D. Odintsov
Comments: 13 pages, clarifications/refs added, to match with published version
Note: replaced with revised version Tue, 4 Apr 2006 06:16:30 GMT (15kb)
hep-th/0601230 [abs, ps, pdf, other] :: Title: The dynamics of coset dimensional reduction
Authors: Josef L.P. Karthauser (1), P.M. Saffin (1 and 2) ((1) University of Sussex, (2) University of Nottingham)
Comments: 27 pages, 4 figures; added citations
Note: replaced with revised version Tue, 4 Apr 2006 12:46:57 GMT (234kb)

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Cross-listings

gr-qc/0603115 [abs, ps, pdf, other] :: Title: Gravitational wave bursts from cosmic (super)strings: Quantitative analysis and constraints
Authors: Xavier Siemens, Jolien Creighton, Irit Maor, Saikat Ray Majumder, Kipp Cannon, Jocelyn Read

We discuss data analysis techniques that can be used in the search for gravitational wave bursts from cosmic strings. When data from multiple interferometers are available, we describe consistency checks that can be used to greatly reduce the false alarm rates. We construct an expression for the rate of bursts for arbitrary cosmic string loop distributions and apply it to simple known solutions. The cosmology is solved exactly and includes the effects of a late-time acceleration. We find substantially lower burst rates than previous estimates suggest and explain the disagreement. Initial LIGO is unlikely to detect field theoretic cosmic strings with the usual loop sizes, though it may detect cosmic superstrings as well as cosmic strings and superstrings with non-standard loop sizes (which may be more realistic). In the absence of a detection, we show how to set upper limits based on the loudest event. Using Initial LIGO sensitivity curves, we show that these upper limits may result in interesting constraints on the parameter space of theories that lead to the production of cosmic strings.
gr-qc/0604012 [abs, ps, pdf, other] :: Title: Gravitational radiation from spinning-black-hole binaries: The orbital hang up
Authors: M. Campanelli, C. O. Lousto, Y. Zlochower
Comments: 5 pages, 5 figures, revtex4

We study the dynamics of spinning-black-hole binaries by numerically solving the full nonlinear field equations of General Relativity. We compute trajectories, merger times, and radiation waveforms. We find that the last stages of the orbital motion of black-hole binaries are profoundly affected by the individual spins. In order to cleanly display its effects, we consider two equal mass holes with individual spin parameters S/m^2=0.75, both aligned and anti-aligned with the orbital angular momentum. We choose initial data corresponding to quasicircular orbits with a period of 125M for both cases. The computed merger time for the aligned spin case is ~225M, performing nearly three orbits before merger, while for the anti-aligned case the merger time is \~105M, performing just less than one orbit before merger. The total energy radiated for the former case is ~6% while for the latter it is only ~2%. The final Kerr hole remnants have rotation parameters a/M=0.9 and a/M=0.44 respectively, showing the difficulty of creating a maximally rotating black hole out of the merger of two spinning holes.
hep-lat/0604004 [abs, ps, pdf, other] :: Title: Deconfinement in dense 2-color QCD
Authors: Simon Hands, Seyong Kim, Jon-Ivar Skullerud
Comments: 14 pages, 22 figures, uses svjour.cls

We study SU(2) lattice gauge theory with two flavors of Wilson fermion at non-zero chemical potential mu and low temperature on a 8^3x16 system. We identify three regimes along the mu-axis. For mu<~m_pi/2 the system remains in the vacuum phase, and all physical observables considered remain essentially unchanged. The intermediate regime is characterised by a non-zero diquark condensate and an associated increase in the baryon density, consistent with what is expected for Bose-Einstein condensation of tightly bound diquarks. We also observe screening of the static quark potential here. In the high-density deconfined regime we find a non-zero Polyakov loop and a strong modification of the gluon propagator, including significant screening in the magnetic sector in the static limit, which must have a non-perturbative origin. The behaviour of thermodynamic observables and the superfluid order parameter are consistent with a Fermi surface disrupted by a BCS diquark condensate. The energy per baryon as a function of mu exhibits a minimum in the deconfined regime, implying that macroscopic objects such as stars formed in this theory are largely composed of quark matter.
hep-ph/0604027 [abs, ps, pdf, other] :: Title: A Universe Without Weak Interactions
Authors: Roni Harnik, Graham D. Kribs, Gilad Perez
Comments: 27 pages; 4 figures

A universe without weak interactions is constructed that undergoes big-bang nucleosynthesis, matter domination, structure formation, and star formation. The stars in this universe are able to burn for billions of years, synthesize elements up to iron, and undergo supernova explosions, dispersing heavy elements into the interstellar medium. These definitive claims are supported by a detailed analysis where this hypothetical "Weakless Universe" is matched to our Universe by simultaneously adjusting Standard Model and cosmological parameters. For instance, chemistry and nuclear physics are essentially unchanged. The apparent habitability of the Weakless Universe suggests that the anthropic principle does not determine the scale of electroweak breaking, or even require that it be smaller than the Planck scale, so long as technically natural parameters may be suitably adjusted. Whether the multi-parameter adjustment is realized or probable is dependent on the ultraviolet completion, such as the string landscape. Considering a similar analysis for the cosmological constant, however, we argue that no adjustments of other parameters are able to allow the cosmological constant to raise up even remotely close to the Planck scale while obtaining macroscopic structure. The fine-tuning problems associated with the electroweak breaking scale and the cosmological constant therefore appear to be qualitatively different from the perspective of obtaining a habitable universe.

Replacements

astro-ph/0507227 [abs, ps, pdf, other] :: Title: Observational Constraints on Accelerating Brane Cosmology with Exchange between the Bulk and Brane
Authors: K. Umezu, K. Ichiki, T. Kajino, G. J. Mathews, R. Nakamura, M. Yahiro
Comments: 11 pages, 5 figures, 1 table
Journal-ref: Phys.Rev.D73:063527,2006
Note: replaced with revised version Wed, 5 Apr 2006 07:20:43 GMT (346kb)
astro-ph/0511666 [abs, ps, pdf, other] :: Title: Mapping the large-scale anisotropy in the WMAP data
Authors: A. Bernui, B. Mota, M.J. Reboucas, R. Tavakol
Comments: 7 pages, 7 figures. Presentation substantially improved. 3-year WMAP data used. Two new figures and references added. Results unchanged. Higher resolution figures available on request. Typos corrected
Note: replaced with revised version Wed, 5 Apr 2006 00:36:07 GMT (696kb)
astro-ph/0512458 [abs, ps, pdf, other] :: Title: Production of Axions by Cosmic Magnetic Helicity
Authors: L. Campanelli, M. Giannotti
Comments: 4 pages, 2 figures, major changes in the first part of the paper, reference added, to be published in Phys. Rev. Lett
Note: replaced with revised version Wed, 5 Apr 2006 16:34:48 GMT (234kb)
astro-ph/0512516 [abs, ps, pdf, other] :: Title: The 21 Centimeter Background from the Cosmic Dark Ages: Minihalos and the Intergalactic Medium before Reionization
Authors: Paul R. Shapiro, Kyungjin Ahn, Marcelo A. Alvarez, Ilian T. Iliev, Hugo Martel, Dongsu Ryu
Comments: 10 pages, 8 figures; Accepted for publication in ApJ, with minor revision in text
Note: replaced with revised version Wed, 5 Apr 2006 02:00:58 GMT (710kb)
astro-ph/0601099 [abs, ps, pdf, other] :: Title: Revisiting the Constraint on the Helium Abundance from CMB
Authors: Kazuhide Ichikawa, Tomo Takahashi
Comments: 15 pages, 5 figures, published version
Note: replaced with revised version Wed, 5 Apr 2006 07:30:06 GMT (55kb)
astro-ph/0602250 [abs, ps, pdf, other] :: Title: Late-Time Spectroscopy of SN 2002cx: The Prototype of a New Subclass of Type Ia Supernovae
Authors: Saurabh Jha (1), David Branch (2), Ryan Chornock (1), Ryan J. Foley (1), Weidong Li (1), Brandon J. Swift (1), Darrin Casebeer (2), Alexei V. Filippenko (1) ((1) University of California, Berkeley, (2) University of Oklahoma)
Comments: 18 pages, 5 figures, to appear in The Astronomical Journal; minor revisions to match accepted version
Note: replaced with revised version Tue, 4 Apr 2006 23:02:52 GMT (205kb)
astro-ph/0603660 [abs, ps, pdf, other] :: Title: Where to find a dark matter sterile neutrino?
Authors: A. Boyarsky, A. Neronov, O. Ruchayskiy, M. Shaposhnikov, I. Tkachev
Comments: 5 pp, revtex; v2: new plots, discussion modified
Note: replaced with revised version Wed, 5 Apr 2006 19:33:04 GMT (17kb)
astro-ph/0603712 [abs, ps, pdf, other] :: Title: The Correlation of Narrow Line Emission and X-ray Luminosity in Active Galactic Nuclei
Authors: Hagai Netzer, V. Mainieri, P. Rosati, Benny Trakhtenbrot
Comments: 10 pages, 3 diagrams, accepted by A&A
Note: replaced with revised version Wed, 5 Apr 2006 09:22:48 GMT (49kb)
astro-ph/0603855 [abs, ps, pdf, other] :: Title: Energy transfer by the scattering of resonant photons
Authors: Avery Meiksin
Comments: 13 pages, 4 figures. Submitted to MNRAS. RT eq. simplified to generalise results including stimulated emission
Note: replaced with revised version Wed, 5 Apr 2006 15:12:09 GMT (48kb)
astro-ph/0604016 [abs, ps, pdf, other] :: Title: The Interpretation and Implication of the Afterglow of GRB 060218
Authors: Yizhong Fan, Tsvi Piran, Dong Xu
Comments: A wrong version was put by Yizhong Fan's mistake and it is replaced by a correct one
Note: replaced with revised version Wed, 5 Apr 2006 14:53:51 GMT (60kb)
gr-qc/0512070 [abs, ps, pdf, other] :: Title: The late-time behaviour of vortic Bianchi type VIII Universes
Authors: Sigbjorn Hervik, Woei Chet Lim
Comments: 19 pages, 3 ps figures, v2:typos fixed, refs and more discussion added
Journal-ref: Class.Quant.Grav. 23 (2006) 3017-3035
Note: replaced with revised version Wed, 5 Apr 2006 14:45:34 GMT (49kb)
hep-ph/0509062 [abs, ps, pdf, other] :: Title: Primordial black holes from cosmic necklaces
Authors: Tomohiro Matsuda
Comments: 22pages, 3 figures, added many comments, +1 figure, accepted for publication in JHEP
Note: replaced with revised version Wed, 5 Apr 2006 10:53:07 GMT (298kb)
hep-th/0601037 [abs, ps, pdf, other] :: Title: Inflation from D3-brane motion in the background of D5-branes
Authors: Sudhakar Panda, M. Sami, Shinji Tsujikawa, John Ward
Comments: 10 pages, 4 figures. Minor clarifications and references added. Version to appear in Phys. Rev. D
Note: replaced with revised version Wed, 5 Apr 2006 07:23:17 GMT (60kb)

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gr-qc/0604018 [abs, ps, pdf, other] :: Title: Testing post-Newtonian theory with gravitational wave observations
Authors: K.G. Arun, B.R. Iyer, M.S.S. Qusailah, B.S. Sathyaprakash
Comments: 9 pages, 2 figures
Journal-ref: Class. Quantum Grav 23 (2006) L37-L43

The Laser Interferometric Space Antenna (LISA) will observe supermassive black hole binary mergers with amplitude signal-to-noise ratio of several thousands. We investigate the extent to which such observations afford high-precision tests of Einstein's gravity. We show that LISA provides a unique opportunity to probe the non-linear structure of post-Newtonian theory both in the context of general relativity and its alternatives.
hep-th/0604034 [abs, ps, pdf, other] :: Title: Strings at future singularities
Authors: Adam Balcerzak, Mariusz P. Dabrowski
Comments: REVTEX 4.0, 4 pages, no figures

We discuss the behaviour of strings propagating in spacetimes which allow future singularities of either a sudden future or a Big-Rip type. We show that in general the invariant string size remains finite at sudden future singularities while it grows to infinity at a Big-Rip. This claim is based on the discussion of both the tensile and null strings. In conclusion, strings may survive a sudden future singularity, but not a Big-Rip where they are infinitely stretched.

Replacements

astro-ph/0412399 [abs, ps, pdf, other] :: Title: About the existence of the exotic molecular ions $(HeH)^{2+}$ and $He_2^{3+}$ in a strong magnetic field
Authors: A.V. Turbiner, J.C. López Vieyra
Comments: 25 pages, 11 Figures, 7 Tables, revtex4 (preprint single column format). The paper is significantly extended by adding a detailed analysis of inclined configurations with demonstration of stability plus a study of excited states. Several Figures and references as well as 4 Tables are added
Note: replaced with revised version Thu, 6 Apr 2006 01:04:04 GMT (190kb)
astro-ph/0508323 [abs, ps, pdf, other] :: Title: A Parameterized Variable Dark Energy Model: Structure Formation and Observational Constraints
Authors: Sepehr Arbabi Bidgoli, M. Sadegh Movahed, Sohrab Rahvar
Comments: 18 pages, 10 figures, submitted to IJMPD
Note: replaced with revised version Thu, 6 Apr 2006 11:57:36 GMT (479kb)
astro-ph/0603100 [abs, ps, pdf, other] :: Title: Revealing the Jet Structure of GRB 030329 with High Resolution Multicolor Photometry
Authors: J. Gorosabel (1), A.J. Castro-Tirado (1), E. Ramirez-Ruiz (2), J. Granot (3), N. Caon (4), L.M. Cairos (4), E. Rubio-Herrera (5), S. Guziy (1), A. de Ugarte Postigo (1), M. Jelinek (1) ((1) IAA/CSIC, Spain; (2) IAS, Princenton, USA; (3) KIPAC, Standford, USA; (4) IAC, Spain; (5) Inst. Anton Pannekoek, NL)
Note: replaced with revised version Thu, 6 Apr 2006 12:10:54 GMT (748kb)
astro-ph/0603746 [abs, ps, pdf, other] :: Title: Does Sgr A* Have an Intrinsic Magnetic Moment Instead of an Event Horizon?
Authors: Stanley L. Robertson, Darryl J. Leiter
Comments: 4 pages, 1 figure, to be submitted to ApJ Letters
Note: replaced with revised version Thu, 6 Apr 2006 16:13:21 GMT (210kb)
gr-qc/0601034 [abs, ps, pdf, other] :: Title: Massive particles in acoustic space-times emergent inertia and passive gravity
Authors: Mordehai Milgrom
Comments: 15 page: version published in Physical Review D
Subj-class: General Relativity and Quantum Cosmology; Fluid Dynamics
Journal-ref: Phys. Rev. D 73, 084005 (2006)
Note: replaced with revised version Thu, 6 Apr 2006 11:10:44 GMT (28kb)
gr-qc/0602086 [abs, ps, pdf, other] :: Title: Quantum Nature of the Big Bang
Authors: Abhay Ashtekar, Tomasz Pawlowski, Parampreet Singh
Comments: Revtex4, 4 Pages, 2 Figures. Minor changes to match the published version in Physical Review Letters
Note: replaced with revised version Thu, 6 Apr 2006 19:13:15 GMT (552kb)
hep-th/0304188 [abs, ps, pdf, other] :: Title: Observational Constraints on Cosmic String Production During Brane Inflation
Authors: Levon Pogosian, S.-H. Henry Tye, Ira Wasserman, Mark Wyman
Comments: 16 pages, 4 figures. A few errors in the computer code used to calculated CMB anistotropy from strings are fixed, resulting in a somewhat tighter bound on G\mu and an enhanced B-mode polarization. Details of the corrected errors and their implications can be found in astro-ph/0604141
Journal-ref: Phys.Rev. D68 (2003) 023506
Note: replaced with revised version Thu, 6 Apr 2006 18:40:44 GMT (62kb)

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