Cross-listings

hep-ph/0602150 [abs, ps, pdf, other] :: Title: Opening a new window for warm dark matter
Authors: Takehiko Asaka, Alexander Kusenko, Mikhail Shaposhnikov
Comments: 5 pages

We explore the range of parameters for dark-matter sterile neutrinos in an extention of the Minimal Standard Model by three singlet fermions with masses below the electroweak scale (the $\nu$MSM). This simple model, which can explain a wide range of phenomena, including neutrino oscillations, baryogenesis, the pulsar velocities, and the early reionization, allows for the dark-matter sterile neutrinos to have masses as small as 0.5 keV. The presence of two heavier sterile neutrinos and the possibility of entropy production in their decays broadens the allowed range of parameters for the dark-matter sterile neutrinos (or other types of dark matter, for example, the gravitino). Of particular interest is the possibility of large mixing angles between active and sterile neutrinos, which may be accessible to laboratory experiments.
hep-th/0602149 [abs, ps, pdf, other] :: Title: Creation of a brane world with a bulk scalar field
Authors: Koh-suke Aoyanagi, Kei-ichi Maeda

We investigate the creation of a brane world with a bulk scalar field. We consider an exponential potential of a bulk scalar field: $V(\phi)\propto \exp(-2\beta \phi)$, where $\beta$ is the parameter of the theory. This model is based on a supersymmetric theory, and includes the Randall-Sundrum model ($\beta=0$) and the 5-dimensional effective model of the Ho\u{r}va-Witten theory ($\beta=1$). We show that for this potential a brane instanton is constructed only when the curvature of a brane vanishes, that is, the brane is flat. We construct an instanton with two branes and a singular instanton with a single brane. The Euclidean action of the singular instanton solution is finite if $\beta^2 >2/3$. We also calculate perturbations of the action around a singular instanton solution in order to show that the singular instanton is well-defined.
nucl-th/0602042 [abs, ps, pdf, other] :: Title: Links Between Heavy Ion and Astrophysics
Authors: C. J. Horowitz
Comments: 8 pages, 6 figures. To be published in "Dynamics and Thermodynamics with Nucleon Degrees of Freedom", eds. P. Chomaz, F. Gulminelli, J. Natowitz, and S. Yennello, this http URL

Heavy ion experiments provide important data to test astrophysical models. The high density equation of state can be probed in HI collisions and applied to the hot protoneutron star formed in core collapse supernovae. The Parity Radius Experiment (PREX) aims to accurately measure the neutron radius of $^{208}$Pb with parity violating electron scattering. This determines the pressure of neutron rich matter and the density dependence of the symmetry energy. Competition between nuclear attraction and coulomb repulsion can form exotic shapes called nuclear pasta in neutron star crusts and supernovae. This competition can be probed with multifragmentation HI reactions. We use large scale semiclassical simulations to study nonuniform neutron rich matter in supernovae. We find that the coulomb interactions in astrophysical systems suppress density fluctuations. As a result, there is no first order liquid vapor phase transition. Finally, the virial expansion for low density matter shows that the nuclear vapor phase is complex with significant concentrations of alpha particles and other light nuclei in addition to free nucleons.
physics/0602096 [abs, ps, pdf, other] :: Title: Fractional Hydrodynamic Equations for Fractal Media
Authors: Vasily E. Tarasov
Comments: 19 pages
Subj-class: Fluid Dynamics; Materials Science; Mathematical Physics; Chaotic Dynamics
Journal-ref: Annals of Physics 318 (2005) 286-307

We use the fractional integrals in order to describe dynamical processes in the fractal media. We consider the "fractional" continuous medium model for the fractal media and derive the fractional generalization of the equations of balance of mass density, momentum density, and internal energy. The fractional generalization of Navier-Stokes and Euler equations are considered. We derive the equilibrium equation for fractal media. The sound waves in the continuous medium model for fractional media are considered.

Replacements

astro-ph/0311063 [abs, ps, pdf, other] :: Title: Aberration and the Fundamental Speed of Gravity in the Jovian Deflection Experiment
Authors: Sergei M. Kopeikin (Univ. of Missouri-Columbia), Edward B. Fomalont (NRAO)
Comments: 23 pages, 3 figures, appendix
Subj-class: Astrophysics; Classical Physics
Note: replaced with revised version Thu, 16 Feb 2006 23:14:08 GMT (40kb)
astro-ph/0408312 [abs, ps, pdf, other] :: Title: Weightlessness of photons: A quantum effect
Authors: Ari Brynjolfsson
Comments: Only minor editorial changes from v2. This is reference [107] of arXiv:astro-ph/0401420 v3 7 Oct 2005: Redshift of photons penetrating a hot plasma
Note: replaced with revised version Fri, 17 Feb 2006 19:38:58 GMT (21kb)
astro-ph/0504504 [abs, ps, pdf, other] :: Title: Hydrodynamical simulations of the decay of high-speed molecular turbulence. II. Divergence from isothermality
Authors: G. Pavlovski, M.D. Smith, M.-M. Mac Low
Comments: accepted for publication by MNRAS
Note: replaced with revised version Fri, 17 Feb 2006 10:05:34 GMT (466kb)
astro-ph/0508284 [abs, ps, pdf, other] :: Title: Timing the bright X-ray population of the core of M31 with XMM-Newton
Authors: R. Barnard, U. Kolb, J. P. Osborne
Comments: 28 pages, 9 figures, accepted for publication in A&A. This version contains major revisions over the previous version, with significantly improved interpretation and analysis
Note: replaced with revised version Fri, 17 Feb 2006 14:47:06 GMT (90kb)
astro-ph/0509843 [abs, ps, pdf, other] :: Title: Local and Large scale Environment of Seyfert Galaxies
Authors: E.Koulouridis, M.Plionis, V.Chavushyan, D.Dultzin-Hacyan, Y.Krongold, C.Goudis
Comments: accepted for publication in ApJ, Abstract size reduced (according to new rules) and corrected references
Note: replaced with revised version Fri, 17 Feb 2006 15:56:55 GMT (30kb)
astro-ph/0511183 [abs, ps, pdf, other] :: Title: Fluctuations of the luminosity distance
Authors: Camille Bonvin, Ruth Durrer, M. Alice Gasparini
Comments: 23 pages, 15 figures, matches published version, first reference changed
Journal-ref: Phys.Rev. D73 (2006) 023523
Note: replaced with revised version Fri, 17 Feb 2006 09:27:07 GMT (85kb)
astro-ph/0601021 [abs, ps, pdf, other] :: Title: Evolving Transport induced by a Surface Wave Propagating along a Vacuum-Matter Interface
Authors: A. Kwang-Hua Chu
Comments: 6 Figures and one table
Note: replaced with revised version Fri, 17 Feb 2006 01:55:30 GMT (88kb)
astro-ph/0602336 [abs, ps, pdf, other] :: Title: Intergal field spectroscopy survey of classical LBV stars in M33
Authors: O. Sholukhova, P. Abolmasov, S. Fabrika, V. Afanasiev (Special Astrophysical Observatory, Russia), M. Roth (AIP, Potsdam, Germany)
Comments: Proceedings of the ESO and Euro3D Workshop "Science Perspectives for 3D Spectroscopy", Garching (Germany), October 10-14, 2005. M. Kissler-Patig, M.M. Roth and J.R. Walsh (eds.)
Note: replaced with revised version Fri, 17 Feb 2006 13:18:07 GMT (130kb)
astro-ph/0602353 [abs, ps, pdf, other] :: Title: Black Holes and Nuclear Dynamics
Authors: David Merritt
Comments: 9 pages. Invited contribution to "AGN and Galaxy Evolution," held in the Specola Vaticana, Castel Gandolfo, Italy, 3 - 6 October 2005
Note: replaced with revised version Fri, 17 Feb 2006 20:56:03 GMT (132kb)
hep-ph/0510391 [abs, ps, pdf, other] :: Title: Radiative Effects in the Standard Model Extension
Authors: V. Ch. Zhukovsky, A. E. Lobanov, E. M. Murchikova
Comments: 10 pages, 2 figures, Revtex4, to appear in Phys.Rev.D
Note: replaced with revised version Fri, 17 Feb 2006 16:37:04 GMT (31kb)
hep-ph/0512107 [abs, ps, pdf, other] :: Title: Electron-Neutrino Bremsstrahlung in Electro-Weak Theory
Authors: Indranath Bhattacharyya
Comments: 18 pages including 4 figures
Note: replaced with revised version Fri, 17 Feb 2006 02:57:06 GMT (43kb)
hep-th/0510022 [abs, ps, pdf, other] :: Title: String Gas Cosmology
Authors: Thorsten Battefeld, Scott Watson
Comments: 55 pages, 1 figure, minor corrections, version to appear in Reviews of Modern Physics
Note: replaced with revised version Fri, 17 Feb 2006 14:42:18 GMT (59kb)

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gr-qc/0602064 [abs, ps, pdf, other] :: Title: Twistor algebraic dynamics in complex space-time and physical meaning of hidden dimensions
Authors: Vladimir V. Kassandrov
Comments: 13 pages, LaTeX
Subj-class: General Relativity and Quantum Cosmology; Mathematical Physics
Journal-ref: Proceedings of the Int. Conference "Physical Interpretation of Relativity Theory (PIRT-05)", eds. M.C.Duffy et al., Moscow, Bauman Univ. Press, 2005, p.42-53

We review the algebraic field theory based completely on a nonlinear generalization of the CR complex analiticity conditions to the noncommutative algebra of biquaternions. Any biquaternionic field possesses natural twistor structure and, in the Minkowski space, gives rise to a shear-free null congruence of rays and to a set of gauge fields associated with it. In the paper we develop the algebrodynamical scheme in the complex extension of Minkowski space-time -- in the full vector space of biquaternion algebra. This primodial space dynamically reduces to the 6D ``observable'' space-time of the complex null cone which in turn decomposes into the 4D physical space-time and the 2D internal ``spin space''. A set of identical point charges (``duplicons'') -- focal points of the congruence -- arises in the procedure. Temporal dynamics of individual duplicons is strongly correlated via fundamental twistor field of the congruence. We briefly discuss some new notions inevitably arising in the considered algebrodynamical scheme, namely those of ``complex time'' and of ``evolutionary curve'', as well as their hypothetical links to the quantum uncertainty phenomenon.
hep-ph/0602144 [abs, ps, pdf, other] :: Title: Preheating with Trilinear Interactions: Tachyonic Resonance
Authors: J.F. Dufaux, G. Felder, L. Kofman, M. Peloso, D. Podolsky
Comments: 19 pages, 10 figures

We investigate the effects of bosonic trilinear interactions in preheating after chaotic inflation. A trilinear interaction term allows for the complete decay of the massive inflaton particles, which is necessary for the transition to radiation domination. We found that typically the trilinear term is subdominant during early stages of preheating, but it actually amplifies parametric resonance driven by the four-legs interaction. In cases where the trilinear term does dominate during preheating, the process occurs through periodic tachyonic amplifications with resonance effects, which is so effective that preheating completes within a few inflaton oscillations. We develop an analytic theory of this process, which we call tachyonic resonance. We also study numerically the influence of trilinear interactions on the dynamics after preheating. The trilinear term eventually comes to dominate after preheating, leading to faster rescattering and thermalization than could occur without it. Finally, we investigate the role of non-renormalizable interaction terms during preheating. We find that if they are present they generally dominate (while still in a controllable regime) in chaotic inflation models. Preheating due to these terms proceeds through a modified form of tachyonic resonance.
hep-th/0512247 [abs, ps, pdf, other] :: Title: Localizing Gravity on the Triple Intersection of 7-branes in 10D
Authors: A. Liam Fitzpatrick, Lisa Randall
Comments: 18 pages, 1 figure
Journal-ref: JHEP 0601 (2006) 113

It was recently proposed that our universe could naturally come to be dominated by 3-branes and 7-branes if the universe is ten-dimensional. In this paper, we explicitly demonstrate that gravity can be localized on the intersection of three 7-branes in AdS10 to give four-dimensional gravity. We derive the exact relations among the tensions of the branes, and show that they apply independently of the precise distribution of energy within the necessarily thickened branes. We demonstrate this with several technical sections showing a simple formula for the curvature tensor of a diagonal metric with isometries as well as for the curvature at a gravitational singularity. We also demonstrate a subtlety in applying Stoke's Theorem to this set-up.
hep-th/0602168 [abs, ps, pdf, other] :: Title: Initial Kaluza-Klein fluctuations and inflationary gravitational waves in braneworld cosmology
Authors: Tsutomu Kobayashi
Comments: 7 pages, 6 figures

We study the spectrum of gravitational waves generated from inflation in the Randall-Sundrum braneworld. Since the inflationary gravitational waves are of quantum-mechanical origin, the initial configuration of perturbations in the bulk includes Kaluza-Klein quantum fluctuations as well as fluctuations in the zero mode. We show, however, that the initial fluctuations in Kaluza-Klein modes have no significant effect on the late time spectrum, irrespective of the energy scale of inflation and the equation of state parameter in the post-inflationary stage. This is done numerically, using the Wronskian formulation.

Replacements

astro-ph/0410548 [abs, ps, pdf, other] :: Title: Magnetospheric Birefringence Induces Unique Polarization Signatures in Neutron-Star Spectra
Authors: R. M. Shannon, Jeremy S. Heyl (UBC)
Comments: 4 pages, 5 figures, changes to reflect accepted version
Note: replaced with revised version Sat, 18 Feb 2006 19:48:49 GMT (462kb)
astro-ph/0505531 [abs, ps, pdf, other] :: Title: Baryogenesis and CP-Violating Domain Walls in the Background of a Magnetic Field
Authors: Leonardo Campanelli, Paolo Cea, Gian Luigi Fogli, Luigi Tedesco
Comments: replaced with revised conclusion version, to be published in JCAP
Note: replaced with revised version Mon, 20 Feb 2006 13:41:18 GMT (523kb)
astro-ph/0509429 [abs, ps, pdf, other] :: Title: Accretion onto the Companion of Eta Carinae During the Spectroscopic Event: II. X-Ray Emission Cycle
Authors: Muhammad Akashi, Noam Soker, Ehud Behar (Technion, Israel)
Comments: The Astrophysical Journal, in press
Note: replaced with revised version Mon, 20 Feb 2006 10:11:58 GMT (406kb)
astro-ph/0510114 [abs, ps, pdf, other] :: Title: The observable effects of a photospheric component on GRB's and XRF's prompt emission spectrum
Authors: Asaf Pe'er, Peter Mészáros, Martin J. Rees
Comments: Discussion added on the results of Baring & Braby (2004); Accepted for publication in Ap.J
Note: replaced with revised version Mon, 20 Feb 2006 13:34:43 GMT (33kb)
astro-ph/0510598 [abs, ps, pdf, other] :: Title: w and w' of Scalar Field Models of Dark Energy
Authors: Takeshi Chiba
Comments: 7 pages, 2 figures, to appear in PRD
Note: replaced with revised version Mon, 20 Feb 2006 01:45:30 GMT (15kb)
astro-ph/0510636 [abs, ps, pdf, other] :: Title: Lithium isotopic abundances in metal-poor halo stars
Authors: Martin Asplund, David L. Lambert, Poul Erik Nissen, Francesca Primas, Verne V. Smith
Comments: Replaced with version accepted by ApJ. Minor changes compared with previous version (some discussion and references added)
Note: replaced with revised version Mon, 20 Feb 2006 00:33:55 GMT (445kb)
astro-ph/0510641 [abs, ps, pdf, other] :: Title: COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses II. SDSS J0924+0219: the redshift of the lensing galaxy, the quasar spectral variability and the Einstein rings
Authors: A. Eigenbrod (1), F. Courbin (1), S. Dye (2), G. Meylan (1), D. Sluse (1), P. Saha (3), C. Vuissoz (1), P. Magain (4). (1- EPFL Switzerland, 2- Cardiff Univ. UK, 3- Univ. Zurich Switzerland, 4- Univ. Liege Belgium)
Comments: 13 pages, 14 figures, accepted for publication in A&A
Note: replaced with revised version Mon, 20 Feb 2006 08:20:43 GMT (614kb)
astro-ph/0511153 [abs, ps, pdf, other] :: Title: Impact of Varying Atmospheric Profiles on Extensive Air Shower Observation: Fluorescence Light Emission and Energy Reconstruction
Authors: B. Keilhauer, J. Bluemer, R. Engel, H. O. Klages
Comments: 21 pages, 5 figures, 4 tables, Astroparticle Physics in press
Note: replaced with revised version Mon, 20 Feb 2006 14:05:26 GMT (164kb)
astro-ph/0511680 [abs, ps, pdf, other] :: Title: Detection of the effect of cosmological large-scale structure on the orientation of galaxies
Authors: Ignacio Trujillo, Conrado Carretero, Santiago G. Patiri
Comments: Accepted for publication in ApJ Letters; Face-on galaxies included and improved discussion on statistical methods; High resolution figures will be published in the Journal version
Note: replaced with revised version Mon, 20 Feb 2006 14:48:15 GMT (180kb)
astro-ph/0602372 [abs, ps, pdf, other] :: Title: Optical and infrared observations of the Type IIP SN2002hh from day 3 to 397
Authors: M.Pozzo (1), W.P.S.Meikle (1), J.T.Rayner (2), R.D.Joseph (2), A.V.Filippenko (3), R.J.Foley (3), W.Li (3), S.Mattila (4), J.Sollerman (4,5) ((1) Imperial College London, (2) Institute for Astronomy, University of Hawaii, (3) Department of Astronomy, University of California, (4) Stockholm Observatory, Department of Astronomy, (5) DARK cosmology center, Copenhagen University)
Comments: 32 pages, 30 figures, accepted for publication in MNRAS
Note: replaced with revised version Fri, 17 Feb 2006 21:20:54 GMT (893kb)
gr-qc/0509002 [abs, ps, pdf, other] :: Title: Space Time Matter inflation
Authors: Mariano Anabitarte, Mauricio Bellini (Mar del Plata University & CONICET)
Comments: accepted in JMP
Subj-class: General Relativity and Quantum Cosmology; Mathematical Physics
Note: replaced with revised version Mon, 20 Feb 2006 15:48:58 GMT (8kb)
gr-qc/0511038 [abs, ps, pdf, other] :: Title: Mach's Principle and a Variable Speed of Light
Authors: Alexander Unzicker
Comments: 12 pages LaTeX, no figures. Notation changed in sec. 4, clarifications in sec. 6.2 and 6.3, some references added
Note: replaced with revised version Sun, 19 Feb 2006 09:48:48 GMT (19kb)
hep-ph/0507257 [abs, ps, pdf, other] :: Title: Hierarchy from Baryogenesis
Authors: Leonardo Senatore (MIT, LNS)
Comments: 28 pages, 4 figures. v2: Added comments and references. Corrected one typo in eq.(81). Conclusions unaltered
Note: replaced with revised version Sun, 19 Feb 2006 04:13:17 GMT (255kb)
hep-ph/0512071 [abs, ps, pdf, other] :: Title: Affleck-Dine baryogenesis and gravitino dark matter
Authors: Osamu Seto
Comments: 13 pages, no figure, reference added and typos corrected, final version
Note: replaced with revised version Mon, 20 Feb 2006 12:03:31 GMT (10kb)
hep-th/0510109 [abs, ps, pdf, other] :: Title: Dynamical Relaxation of Dark Energy: A Solution to Early Inflation, Late-time Acceleration and the Cosmological Constant Problem
Authors: Benedict M.N. Carter, Ishwaree P. Neupane
Comments: 5 pages, 2 figures; v2 title changed; v3 small changes improving explanations, refs added
Note: replaced with revised version Mon, 20 Feb 2006 20:53:05 GMT (116kb)
hep-th/0512002 [abs, ps, pdf, other] :: Title: Black hole particle emission in higher-dimensional spacetimes
Authors: Vitor Cardoso, Marco Cavaglia, Leonardo Gualtieri
Comments: 4 pages, RevTeX 4. Minor typos corrected, version to appear in Phys. Rev. Lett
Note: replaced with revised version Sat, 18 Feb 2006 03:23:30 GMT (8kb)

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gr-qc/0507077 [abs, ps, pdf, other] :: Title: Simple model of big-crunch/big-bang transition
Authors: Przemyslaw Malkiewicz, Wlodzimierz Piechocki
Comments: 17 pages, no figures, RevTeX4, accepted for publication in Class. Quantum Grav

We present classical and quantum dynamics of a test particle in the compactified Milne space. Background spacetime includes one compact space dimension undergoing contraction to a point followed by expansion. Quantization consists in finding a self-adjoint representation of the algebra of particle observables. Our model offers some insight into the nature of the cosmic singularity.
gr-qc/0602071 [abs, ps, pdf, other] :: Title: Tidal Dynamics in Kerr Spacetime
Authors: C. Chicone, B. Mashhoon
Comments: 15 pages, 3 figures

The motion of free nearby test particles relative to a stable equatorial circular geodesic orbit about a Kerr source is investigated. It is shown that the nonlinear generalized Jacobi equation can be transformed in this case to an autonomous form. Tidal dynamics beyond the critical speed c/sqrt(2) is studied. We show, in particular, that a free test particle vertically launched from the circular orbit parallel or antiparallel to the Kerr rotation axis is tidally accelerated if its initial relative speed exceeds c/sqrt(2). Possible applications of our results to high-energy astrophysics are briefly mentioned.
hep-ph/0602169 [abs, ps, pdf, other] :: Title: Constraints on Light Dark Matter From Core-Collapse Supernovae
Authors: Pierre Fayet, Dan Hooper, Gunter Sigl
Comments: 4 pages, 1 figure

We show that light ($\simeq$ 1 -- 30 MeV) dark matter particles can play a significant role in core-collapse supernovae, if they have relatively large annihilation and scattering cross sections, as compared to neutrinos. We find that if such particles are lighter than $\simeq$ 10 MeV and reproduce the observed dark matter relic density, supernovae would cool on a much longer time scale and would emit neutrinos with significantly smaller energies than in the standard scenario, in disagreement with observations. This constraint may be avoided, however, in certain situations for which the neutrino--dark matter scattering cross sections remain comparatively small.
hep-th/0602194 [abs, ps, pdf, other] :: Title: Gravitational waves and cosmological braneworlds: a characteristic evolution scheme
Authors: Sanjeev S. Seahra
Comments: 21 pages, 18 figures

Motivated by the problem of the evolution of bulk gravitational waves in Randall-Sundrum cosmology, we develop a characteristic numerical scheme to solve 1+1 dimensional wave equations in the presence of a moving timelike boundary. The scheme exhibits quadratic convergence, is capable of handling arbitrary brane trajectories, and is easily extendible to non-AdS bulk geometries. We use our method to contrast two different prescriptions for the bulk fluctuation initial conditions found in the literature; namely, those of Hiramatsu et al. (hep-th/0410247) and Ichiki and Nakamura (astro-ph/0406606). We find that if the initial data surface is set far enough in the past, the late time waveform on the brane is insensitive to the choice between the two possibilities; and we present numeric and analytic evidence that this phenomenon generalizes to more generic initial data. Observationally, the main consequence of this work is to re-affirm previous claims that the stochastic gravitational wave spectrum is predominantly flat, in contradiction with naive predictions from the effective 4-dimensional theory. Furthermore, this flat spectrum result is predicted to be robust against uncertainties in (or modifications of) the bulk initial data, provided that the energy scale of brane inflation is high enough.

Replacements

astro-ph/0406137 [abs, ps, pdf, other] :: Title: Fe II and Mg II in Luminous, Intermediate-Redshift Narrow-line Seyfert 1 Galaxies from the Sloan Digital Sky Survey
Authors: Karen M. Leighly, John R. Moore (The University of Oklahoma)
Comments: Accepted for publication in ApJ. Spectral fitting and analysis substantially revised
Note: replaced with revised version Tue, 21 Feb 2006 01:56:29 GMT (113kb)
astro-ph/0508054 [abs, ps, pdf, other] :: Title: Star Formation in Isolated Disk Galaxies. II. Schmidt Laws and Efficiency of Gravitational Collapse
Authors: Yuexing Li, Mordecai-Mark Mac Low, Ralf S. Klessen
Comments: 21 pages, 15 figures, to appear on ApJ March 2006. (Paper I is ApJ 626, 823, 2005, or astro-ph/0501022)
Journal-ref: Astrophys. J. 639, 879, 2006
Note: replaced with revised version Tue, 21 Feb 2006 05:06:02 GMT (177kb)
astro-ph/0511113 [abs, ps, pdf, other] :: Title: Unbiased Studies of Diffuse Extragalactic Radio Sources
Authors: Lawrence Rudnick, Kisha M. Delain, Jeffrey A. Lemmerman
Comments: Conference proceedings, "Origins and Evolution of Cosmic Magnetic Fields". 4 pages, 5 figures. Minor changes due to referee reports; accepted for publication
Note: replaced with revised version Tue, 21 Feb 2006 20:57:44 GMT (292kb)
astro-ph/0511302 [abs, ps, pdf, other] :: Title: Variations in the spectral slope of Sgr A* during a NIR flare
Authors: S. Gillessen, F. Eisenhauer, E. Quataert, R. Genzel, T. Paumard, S. Trippe, T. Ott, R. Abuter, A. Eckart, P. O. Lagage, M. D. Lehnert, L. J. Tacconi, F. Martins
Comments: 4 pages, 3 figures, emulateapj.cls, accepted by ApJL, v2: more detailed analysis section
Note: replaced with revised version Tue, 21 Feb 2006 16:27:39 GMT (417kb)
astro-ph/0512234 [abs, ps, pdf, other] :: Title: Modeling Luminosity-Dependent Galaxy Clustering Through Cosmic Time
Authors: Charlie Conroy, Risa H. Wechsler, Andrey V. Kravtsov (University of Chicago)
Comments: 16 pages 11 figures, ApJ in press
Note: replaced with revised version Tue, 21 Feb 2006 16:18:59 GMT (83kb)
astro-ph/0512279 [abs, ps, pdf, other] :: Title: Constraining the Cosmological Parameters and Transition Redshift with Gamma-Ray Bursts and Supernovae
Authors: F. Y. Wang, Z. G. Dai (NJU)
Comments: Revised version based on the referee's comments, added references, MNRAS in press
Note: replaced with revised version Tue, 21 Feb 2006 19:55:03 GMT (233kb)
physics/0511149 [abs, ps, pdf, other] :: Title: Ambivalent effects of added layers on steady kinematic dynamos in cylindrical geometry: application to the VKS experiment
Authors: F. Stefani, M. Xu, G. Gerbeth, F. Ravelet, A. Chiffaudel, F. Daviaud, J. Léorat
Comments: 24 pages, 11 figures, minor changes, to appear in European Journal of Mechanics B/Fluids
Subj-class: Fluid Dynamics; Plasma Physics
Note: replaced with revised version Tue, 21 Feb 2006 15:13:53 GMT (170kb)
cond-mat/0601409 [abs, ps, pdf, other] :: Title: Comment on "Entropy of Classical Systems with Long-Range Interactions" by T.M. Rocha Filho et al, PRL 95, 190601 (2005)
Authors: A. Rapisarda, A. Pluchino, C. Tsallis
Comments: 1 page, no figures. Revised version, refs added
Subj-class: Statistical Mechanics; Plasma Physics
Note: replaced with revised version Tue, 21 Feb 2006 16:58:34 GMT (3kb)

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gr-qc/0602081 [abs, ps, pdf, other] :: Title: Physics of dark energy particles
Authors: C. G. Boehmer, T. Harko
Comments: 10 pages, no figures, to appear in Mod. Phys. Lett. A

We consider the astrophysical and cosmological implications of the existence of a minimum density and mass due to the presence of the cosmological constant. If there is a minimum length in nature, then there is an absolute minimum mass corresponding to a hypothetical particle with radius of the order of the Planck length. On the other hand, quantum mechanical considerations suggest a different minimum mass. These particles associated with the dark energy can be interpreted as the "quanta" of the cosmological constant. We study the possibility that these particles can form stable stellar-type configurations and the Jeans and Chandrasekhar masses are estimated. From the requirement of the energetic stability of the minimum density configuration on a macroscopic scale one obtains a mass of the order of $10^{55}$ g, of the same order of magnitude as the mass of the universe. Furthermore we present a representation of the cosmological constant in terms of 'classical' fundamental constants.
gr-qc/0602084 [abs, ps, pdf, other] :: Title: The universe out of a monopole in the laboratory?
Authors: Nobuyuki Sakai, Ken-ichi Nakao, Hideki Ishihara, Makoto Kobayashi
Comments: 15 pages, 5 figures

To explore the possibility that an inflationary universe can be created out of a stable particle in the laboratory, we consider the classical and quantum dynamics of a magnetic monopole in the thin-shell approximation. Classically there are three types of solutions: stable, collapsing and inflating monopoles. We argue that the transition from a stable monopole to an inflating one could occur either by collision with a domain wall or by quantum tunneling.
hep-ph/0602186 [abs, ps, pdf, other] :: Title: Chiral Phase Structure at Finite Temperature and Density in Einstein Universe
Authors: Xuguang Huang, Xuewen Hao, Pengfei Zhuang
Comments: 8 pages, 8 figures

The gravitation effect on the chiral phase structure at finite temperature and density is investigated in the frame of Nambu--Jona-Lasinio model in $D$-dimensional ultrastatic Einstein universe. In mean field approximation, the thermodynamic potential and the gap equation determining the curvature, temperature and density dependence of the chiral condensate are analytically derived. In the sense of chiral symmetry restoration and the order of the phase transition, the scalar curvature of the space-time plays similar role as the temperature.
hep-ph/0602187 [abs, ps, pdf, other] :: Title: Determination of Dark Matter Properties at High-Energy Colliders
Authors: Edward A. Baltz, Marco Battaglia, Michael E. Peskin, Tommer Wizansky
Comments: 121 pages, 62 figures

If the cosmic dark matter consists of weakly-interacting massive particles, these particles should be produced in reactions at the next generation of high-energy accelerators. Measurements at these accelerators can then be used to determine the microscopic properties of the dark matter. From this, we can predict the cosmic density, the annihilation cross sections, and the cross sections relevant to direct detection. In this paper, we present studies in supersymmetry models with neutralino dark matter that give quantitative estimates of the accuracy that can be expected. We show that these are well matched to the requirements of anticipated astrophysical observations of dark matter. The capabilities of the proposed International Linear Collider (ILC) are expected to play a particularly important role in this study.
hep-th/0601126 [abs, ps, pdf, other] :: Title: Graviton Emission in the Bulk from a Higher-Dimensional Schwarzschild Black Hole
Authors: S. Creek, O. Efthimiou, P. Kanti, K. Tamvakis
Comments: 17 pages, 2 figures, minor corrections, accepted by Phys. Lett. B

We consider the evaporation of (4+n)-dimensional non-rotating black holes into gravitons. We calculate the energy emission rate for gravitons in the bulk obtaining analytical solutions of the master equation satisfied by all three types (S,V,T) of gravitational perturbations. Our results, valid in the low-energy regime, show a vector radiation dominance for every value of n, while the relative magnitude of the energy emission rate of the subdominant scalar and tensor radiation depends on n. The low-energy emission rate in the bulk for gravitons is well below that for a scalar field, due to the absence of the dominant l=0,1 modes from the gravitational spectrum. Higher partial waves though may modify this behaviour at higher energies. The calculated low-energy emission rate, for all types of degrees of freedom decreases with n, although the full energy emission rate, integrated over all frequencies, is expected to increase with n, as in the previously studied case of a bulk scalar field.
hep-th/0602187 [abs, ps, pdf, other] :: Title: Oscillons in Scalar Field Theories: Applications in Higher Dimensions and Inflation
Authors: Marcelo Gleiser
Comments: 11 pages, 4 figures, to appear in Int. J. Mod. Phys. D

The basic properties of oscillons -- localized, long-lived, time-dependent scalar field configurations -- are briefly reviewed, including recent results demonstrating how their existence depends on the dimensionality of spacetime. Their role on the dynamics of phase transitions is discussed, and it is shown that oscillons may greatly accelerate the decay of metastable vacuum states. This mechanism for vacuum decay -- resonant nucleation -- is then applied to cosmological inflation. A new inflationary model is proposed which terminates with fast bubble nucleation.

Replacements

astro-ph/0503461 [abs, ps, pdf, other] :: Title: Effects of Pulsar Rotation on Timing Measurements of the Double Pulsar System J0737-3039
Authors: Roman R. Rafikov (IAS), Dong Lai (Cornell)
Comments: Minor changes, accepted to ApJ
Note: replaced with revised version Tue, 21 Feb 2006 23:22:08 GMT (56kb)
astro-ph/0507099 [abs, ps, pdf, other] :: Title: Torus Formation in Neutron Star Mergers and Well-Localized Short Gamma-Ray Bursts
Authors: R. Oechslin, H.-Th. Janka (MPI for Astrophysics, Garching)
Comments: 12 pages, 9 figures, high-resolution color figures available on request; accepted by MNRAS
Note: replaced with revised version Wed, 22 Feb 2006 19:23:59 GMT (903kb)
astro-ph/0507605 [abs, ps, pdf, other] :: Title: Enrichment of the ICM of galaxy clusters due to ram-pressure stripping
Authors: W. Domainko (1), M. Mair (1), W. Kapferer (1), E. van Kampen (1), T. Kronberger (2,1), S. Schindler (1), S. Kimeswenger (1), M. Ruffert (3), O. E. Mangete (3) ((1) Institut fuer Astro- and Teilchenphysik, Universitaet Innsbruck, Austria, (2) Institute for Astrophysics, University of Goettingen, Germany, (3) School of Mathematics, University of Edinburgh, UK)
Comments: 10 pages, 6 figures, accepted for publication in A&A
Note: replaced with revised version Wed, 22 Feb 2006 13:17:07 GMT (110kb)
astro-ph/0508094 [abs, ps, pdf, other] :: Title: Magnetic reconnection with anomalous resistivity in two-and-a-half dimensions I: Quasi-stationary case
Authors: Leonid M. Malyshkin, Timur Linde, Russell M. Kulsrud
Comments: 15 pages, 4 figures, minor changes as compared to the 1st version
Subj-class: Astrophysics; Plasma Physics; Space Physics
Journal-ref: PHYSICS OF PLASMAS 12 (10): Art. No. 102902 OCT 2005
Note: replaced with revised version Wed, 22 Feb 2006 19:26:28 GMT (114kb)
astro-ph/0508306 [abs, ps, pdf, other] :: Title: Periodic long-term X-ray and radio variability of Cygnus X-1
Authors: Pawel Lachowicz, Andrzej A. Zdziarski, Alex Schwarzenberg-Czerny, Guy G. Pooley, Shunji Kitamoto
Comments: MNRAS, in press
Note: replaced with revised version Wed, 22 Feb 2006 12:33:41 GMT (255kb)
astro-ph/0508372 [abs, ps, pdf, other] :: Title: QCD phase transition in rotaing neutron star, Neutrino beaming and Gamma-ray bursters
Authors: Abhijit Bhattacharyya, Sanjay K. Ghosh, Sibaji Raha
Comments: Modified manuscript with 9 pages including 3 ps figures, Accepted for publication in Phys. Lett. B
Note: replaced with revised version Wed, 22 Feb 2006 06:15:21 GMT (13kb)
astro-ph/0510147 [abs, pdf] :: Title: Discrete Self-Similarity Between RR Lyrae Stars And Their Constituent Helium Atoms
Authors: R. L. Oldershaw
Comments: 10 pages, 1 figure, 2 tables, improved and expanded presentation, comments welcome
Subj-class: Astrophysics; Chaotic Dynamics; Atomic Physics
Note: replaced with revised version Wed, 22 Feb 2006 00:03:22 GMT (59kb)
astro-ph/0512417 [abs, ps, pdf, other] :: Title: Effects of Gravitational Lensing and Companion Motion on the Binary Pulsar Timing
Authors: Roman R. Rafikov (CITA), Dong Lai (Cornell)
Comments: Minor changes, accepted to Phys. Rev. D
Note: replaced with revised version Tue, 21 Feb 2006 23:19:16 GMT (26kb)
astro-ph/0601434 [abs, ps, pdf, other] :: Title: The SDSS Quasar Survey: Quasar Luminosity Function from Data Release Three
Authors: Gordon T. Richards, Michael A. Strauss, Xiaohui Fan, Patrick B. Hall, Sebastian Jester, Donald P. Schneider, Daniel E. Vanden Berk, Chris Stoughton, Scott F. Anderson, Robert J. Brunner, Jim Gray, James E. Gunn, Zeljko Ivezic, Margaret K. Kirkland, G.R. Knapp, Jon Loveday, Avery Meiksin, Adrian Pope, Alexander S. Szalay, Anirudda R. Thakar, Brian Yanny, Donald G. York, et al., for the SDSS Collaboration
Comments: 57 pages, 21 figures (9 color); minor changes to reflect the version accepted by AJ; higher resolution version available at this ftp URL
Note: replaced with revised version Wed, 22 Feb 2006 16:22:10 GMT (672kb)
astro-ph/0602234 [abs, ps, pdf, other] :: Title: Instabilities of rotating compact stars: a brief overview
Authors: L. Villain
Comments: 19 pages, Proceeding of Cargese School "Astrophysical fluid dynamics" (May 2005) organized by B. Dubrulle and M. Rieutord in honour of J.-P. Zahn and S. Bonazzola. Slightly upgraded version: references added, summary on compact stars birth clarified
Note: replaced with revised version Wed, 22 Feb 2006 17:11:50 GMT (235kb)
hep-th/0512259 [abs, ps, pdf, other] :: Title: Cosmological tachyon from cubic string field theory
Authors: Gianluca Calcagni
Comments: 20 pages, 1 figure; v2: discussion improved, misprints corrected, references added
Note: replaced with revised version Wed, 22 Feb 2006 10:14:30 GMT (62kb)

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Cross-listings

cond-mat/0602452 [abs, ps, pdf, other] :: Title: Universal optimal hole-doping concentration in single-layer high-temperature cuprate superconductors
Authors: T. Honma, P. H. Hor
Comments: 7 pages, 4 figures, submitted to Europhysics Letters
Subj-class: Superconductivity; Strongly Correlated Electrons

We argue that in cuprate physics there are two types, hole content per CuO2 plane Ppl and the corresponding hole content per unit volume P3D, of hole-doping concentrations for addressing physical properties that are two-dimensional (2D) and three-dimensional (3D) in nature, respectively. We find that superconducting transition temperature Tc varies systematically with P3D$ as a superconducting dome with a universal optimal hole-doping concentration P3Dopt. = 1.6 x 10^21 cm-3 for single-layer high-Tc superconductors. We suggest that P3Dopt. determines the upper bound of the electronic energy of underdoped single-layer high-Tc cuprates.
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

Some long standing issues concerning the quantum nature of the big bang are resolved in the context of homogeneous isotropic models with a scalar field. Specifically, the known results on the resolution of the big bang singularity in loop quantum gravity are significantly extended as follows: i) the scalar field is shown to serve as an internal clock, thereby providing a detailed realization of the `emergent time' idea; ii) the physical Hilbert space, Dirac observables and semi-classical states are constructed rigorously; iii) the Hamiltonian constraint is solved numerically to show that the big bang is replaced by a big bounce. Thanks to the non-perturbative, background independent methods, unlike in other approaches the quantum evolution is deterministic across the deep Planck regime.
gr-qc/0602089 [abs, ps, pdf, other] :: Title: Could the Pioneer anomaly have a gravitational origin?
Authors: Kjell Tangen
Comments: 9 pages, 1 figure

If the Pioneer anomaly has a gravitational origin, it would, according to the equivalence principle, distort the motions of the planets in the Solar System. Since no anomalous motion of the planets have been detected, it is generally believed that the Pioneer anomaly can not originate from a gravitational source in the Solar System. However, this conclusion becomes less obvious when considering models that either imply modifications to gravity at long range or gravitational sources localized to the outer Solar System, given the uncertainty in the orbital parameters of the outer planets. Following the general assumption that the Pioneer spacecrafts move geodesically in a spherically symmetric spacetime metric, we derive the metric disturbance that is needed in order to account for the Pioneer anomaly. We then analyze the residual effects on the astronomical observables of the outer planets that would arise from this metric disturbance, given an arbitrary metric theory of gravity. The computed residuals are much larger than the observed residuals, and we are lead to the conclusion that the Pioneer anomaly can not originate from a metric disturbance and therefore that the motion of the Pioneer spacecrafts must be non-geodesic. Since our results are model independent, they can be applied to rule out any model of the Pioneer anomaly that implies that the Pioneer spacecrafts move geodesically in a perturbed spacetime metric, regardless of the origin of this metric disturbance.

Replacements

astro-ph/0504005 [abs, ps, pdf, other] :: Title: Constraints on backreaction in dust universes
Authors: Syksy Rasanen
Comments: 15 pages, 1 figure. v2: The numbers in observational constraints corrected (no qualitative change), added discussion and references. v3: More references, clearer presentation, a new section on theoretical bounds. Conclusions stronger. v4: Published version. No major changes
Journal-ref: Class. Quantum Grav. 23 (2006) 1823-1835
Note: replaced with revised version Thu, 23 Feb 2006 20:51:16 GMT (35kb)
astro-ph/0509829 [abs, ps, pdf, other] :: Title: Chemical and Photometric Evolution of the Local Group Galaxy NGC 6822 in a Cosmological Context
Authors: Leticia Carigi, Pedro Colin, Manuel Peimbert
Comments: 25 pages, ApJ accepted
Note: replaced with revised version Thu, 23 Feb 2006 19:42:21 GMT (113kb)
astro-ph/0510634 [abs, ps, pdf, other] :: Title: Spectral distortions to the Cosmic Microwave Background from the recombination of hydrogen and helium
Authors: Wan Yan Wong, Sara Seager, Douglas Scott
Comments: 12 pages, 12 figures; Minor corrections in text and references; MNRAS in press
Note: replaced with revised version Thu, 23 Feb 2006 18:23:15 GMT (192kb)
astro-ph/0510728 [abs, ps, pdf, other] :: Title: Mass Along the Line of Sight to the Gravitational Lens B1608+656: Galaxy Groups and Implications for H_0
Authors: C. D. Fassnacht (1), R. R. Gal (1), L. M. Lubin (1), J. P. McKean (1), G. K. Squires (2), A. C. S. Readhead (3) ((1) UC Davis, (2) Spitzer Science Center, (3) Caltech)
Comments: Accepted for publication in ApJ. Minor changes to match accepted version. 10 pages, 7 figures
Note: replaced with revised version Thu, 23 Feb 2006 19:25:30 GMT (169kb)
astro-ph/0510773 [abs, ps, pdf, other] :: Title: Signatures of restarted activity in core-dominated, triple radio sources selected from the FIRST survey
Authors: A. Marecki (1), P. Thomasson (2), K.-H. Mack (3), M. Kunert-Bajraszewska (1) ((1) Torun Centre for Astronomy, N. Copernicus University, Poland, (2) Jodrell Bank Observatory, The University of Manchester, UK, (3) INAF - Istituto di Radioastronomia, Bologna, Italy)
Comments: 9 pages, 5 figures, matches the version printed in Astronomy & Astrophysics, very minor correction of Table 1
Note: replaced with revised version Thu, 23 Feb 2006 10:26:22 GMT (200kb)
astro-ph/0512034 [abs, ps, pdf, other] :: Title: FIRST-based survey of Compact Steep Spectrum sources, III. MERLIN and VLBI observations of subarcsecond-scale objects
Authors: Andrzej Marecki (1), Magdalena Kunert-Bajraszewska (1), Ralph E. Spencer (2) ((1) Torun Centre for Astronomy, N. Copernicus University, Torun, (2) Jodrell Bank Observatory, The University of Manchester)
Comments: 37 pages, 22 figures, matches the version printed in Astronomy & Astrophysics
Note: replaced with revised version Thu, 23 Feb 2006 15:55:05 GMT (1058kb)
astro-ph/0601038 [abs, pdf] :: Title: Discrete Cosmological Self-Similarity And Delta Scuti Stars
Authors: R. L. Oldershaw
Comments: 14 pages, 1 figure, 3 tables
Note: replaced with revised version Thu, 23 Feb 2006 16:36:54 GMT (123kb)
astro-ph/0601077 [abs, ps, pdf, other] :: Title: Hubble Space Telescope NICMOS Polarization Measurements of OMC-1
Authors: Janet P. Simpson (1 and 2), Sean W. J. Colgan (1), Edwin F. Erickson (1), Michael G. Burton (3), A. S. B. Schultz (2) ((1) NASA Ames Research Center, (2) SETI Institute, (3) University of New South Wales)
Comments: 41 pages, 8 figures, 4 tables, to appear in The Astrophysical Journal
Note: replaced with revised version Thu, 23 Feb 2006 18:38:41 GMT (361kb)
astro-ph/0601120 [abs, ps, pdf, other] :: Title: The Dependence of the Occupation of Galaxies on the Halo Formation Time
Authors: Guangtun Zhu (1), Zheng Zheng (2), W.P. Lin (1), Y.P. Jing (1), Xi Kang (1 and 3), Liang Gao (4) ((1) SHAO, (2) IAS, Princeton, (3) Oxford, (4) ICC, Durham)
Comments: 4 pages, 2 figures, Accepted by ApJ Letters, emulateapj layout. Minor changes. Poisson errors added in Figure 1. We remove the last figure, which is available in this http URL
Journal-ref: 2006ApJ...639L...5Z
Note: replaced with revised version Thu, 23 Feb 2006 10:36:14 GMT (41kb)
astro-ph/0602118 [abs, ps, pdf, other] :: Title: Dissipative or Conservative cosmology with dark energy ?
Authors: Marek Szydlowski, Orest Hrycyna
Comments: RevTeX4, 23 pages, 12 figures; new part on general properties of dissipative FRW models (v.2)
Note: replaced with revised version Thu, 23 Feb 2006 18:17:48 GMT (287kb)
gr-qc/0512100 [abs, ps, pdf, other] :: Title: Inflaton and metric fluctuations in the early universe from a 5D vacuum state
Authors: Agustin Membiela (Mar del Plata University), Mauricio Bellini (Mar del Plata University & CONICET)
Comments: version improved (with only one figure)
Subj-class: General Relativity and Quantum Cosmology; Mathematical Physics
Note: replaced with revised version Thu, 23 Feb 2006 15:57:35 GMT (15kb)
hep-ph/0512107 [abs, ps, pdf, other] :: Title: Electron-Neutrino Bremsstrahlung in Electro-Weak Theory
Authors: Indranath Bhattacharyya
Comments: 18 pages including 4 figures
Note: replaced with revised version Thu, 23 Feb 2006 19:03:07 GMT (43kb)
hep-th/0511301 [abs, ps, pdf, other] :: Title: Super-acceleration on the Brane by Energy Flow from the Bulk
Authors: Rong-Gen Cai, Yungui Gong, Bin Wang
Comments: Revtex, 11 pages including 2 figures,v2: tpos fixed, references added, to appear in JCAP
Note: replaced with revised version Thu, 23 Feb 2006 12:26:12 GMT (17kb)
hep-th/0602061 [abs, ps, pdf, other] :: Title: Strings, Black Holes, and Quantum Information
Authors: Renata Kallosh, Andrei Linde
Comments: 30 pages, 10 figures. We added a discussion of "small" black holes with a single charge, improved notations, and added references
Note: replaced with revised version Thu, 23 Feb 2006 01:06:17 GMT (408kb)
nucl-ex/0409017 [abs, ps, pdf, other] :: Title: Astrophysical S_{17}(0) factor from a measurement of d(7Be,8B)n reaction at E_{c.m.} = 4.5 MeV
Authors: J.J. Das, V.M. Datar, P. Sugathan, N. Madhavan, P.V. Madhusudhana Rao, A. Jhingan, A. Navin, S.K. Dhiman, S. Barua, S. Nath, T. Varughese, A.K. Sinha, R. Singh, A. Ray, D.L. Sastry, R.G. Kulkarni, R. Shyam
Comments: 15 pages including 3 eps figures, one figure removed and discussions updated. Version to appear in Physical Review C
Journal-ref: Phys. Rev. C 73, 015808 (2006)
Note: replaced with revised version Thu, 23 Feb 2006 09:18:02 GMT (85kb)

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