Cross-listings

gr-qc/0603028 [abs, ps, pdf, other] :: Title: Integration of the Friedmann equation for universes of arbitrary complexity
Authors: Kayll Lake
Comments: revtex4, 1 figure, 4 pages twocolumn

An explicit and complete set of constants of the motion are constructed algorithmically for Friedmann-Lema\^{i}tre-Robertson-Walker (FLRW) models consisting of an arbitrary number of non-interacting species. The inheritance of constants of the motion from simpler models as more species are added is stressed. It is then argued that all FLRW models admit a unique candidate for a gravitational epoch function. The same relations that lead to the construction of constants of the motion allow an explicit evaluation of this function. In the simplest of all models, the $\Lambda$CDM model, it is shown that the epoch function exists for all models with $\Lambda > 0$, but for almost no models with $\Lambda < 0$.
gr-qc/0603030 [abs, ps, pdf, other] :: Title: Signals for Lorentz Violation in Post-Newtonian Gravity
Authors: Quentin G. Bailey, Alan Kostelecky
Comments: 112 pages

The pure-gravity sector of the minimal Standard-Model Extension is studied in the limit of Riemann spacetime. A method is developed to extract the modified Einstein field equations in the limit of small metric fluctuations about the Minkowski vacuum, while allowing for the dynamics of the coefficients for Lorentz violation. The linearized effective equations depend on 20 independent coefficients, and they are solved to obtain the post-newtonian metric. The corresponding post-newtonian behavior of a perfect fluid is studied and applied to the gravitating many-body system. Illustrative examples of the methodology are provided using bumblebee models. The implications of the general theoretical results are studied for a variety of existing and proposed gravitational experiments, including lunar and satellite laser ranging, laboratory experiments with gravimeters and torsion pendula, measurements of the spin precession of orbiting gyroscopes, timing studies of signals from binary pulsars, and the classic tests involving the perihelion precession and the time delay of light. Previously unexplored possibilities include certain high-sensitivity measurements based on the local anisotropy of gravity and observations of effects determined by coefficients coupling to the Weyl tensor. For each type of experiment considered, estimates of the attainable sensitivities are provided. Numerous effects of local Lorentz violation can be studied in existing or near-future experiments at sensitivities ranging from parts in 10^4 down to parts in 10^{15}.
hep-th/0602175 [abs, ps, pdf, other] :: Title: Twisted Superconducting Semilocal Strings
Authors: Peter Forgacs, Sebastien Reuillon, Mikhail S. Volkov
Comments: 39 pages, 20 figures
Subj-class: High Energy Physics - Theory; Superconductivity

A new class of twisted, current carrying, stationary, straight string solutions having finite energy per unit length is constructed numerically in an extended Abelian Higgs model with global SU(2) symmetry. The new solutions correspond to deformations of the embedded Abrikosov-Nielsen-Olesen (ANO) vortices by a twist -- a relative coordinate dependent phase between the two Higgs fields. The twist induces a global current flowing through the string, and the deformed solutions bifurcate with the ANO vortices in the limit of vanishing current. For each value of the winding number $n=1,2...$ (determining the magnetic flux through the plane orthogonal to the string) there are $n$ distinct, two-parametric families of solutions. One of the continuously varying parameters is the twist, or the corresponding current, the other one can be chosen to be the momentum of the string. For fixed values of the momentum and twist, the $n$ distinct solutions have different energies and can be viewed as a lowest energy ``fundamental'' string and its $n-1$ ``excitations'' characterized by different values of their ``polarization''. The latter is defined as the ratio of the angular momentum of the vortex and its momentum. In their rest frame the twisted vortices have lower energy than the embedded ANO vortices and could be of considerable importance in various physical systems (from condensed matter to cosmic strings).
hep-th/0603057 [abs, ps, pdf, other] :: Title: Dynamics of dark energy
Authors: Edmund J. Copeland, M. Sami, Shinji Tsujikawa
Comments: 86 pages, 26 figures, Invited Review to be submitted to International Journal of Modern Physics D; comments are welcome; latex problem corrected; a few references added

In this paper we review in detail a number of approaches that have been adopted to try and explain the remarkable observation of our accelerating Universe. In particular we discuss the arguments for and recent progress made towards understanding the nature of dark energy. We review the observational evidence for the current accelerated expansion of the universe and present a number of dark energy models in addition to the conventional cosmological constant, paying particular attention to scalar field models such as quintessence, K-essence, tachyon, phantom and dilatonic models. The importance of cosmological scaling solutions is emphasized when studying the dynamical system of scalar fields including coupled dark energy. We study the evolution of cosmological perturbations allowing us to confront them with the observation of the Cosmic Microwave Background and Large Scale Structure and demonstrate how it is possible in principle to reconstruct the equation of state of dark energy by also using Supernovae Ia observational data. We also discuss in detail the nature of tracking solutions in cosmology, particle physics and braneworld models of dark energy, the nature of possible future singularities, the effect of higher order curvature terms to avoid a Big Rip singularity, and approaches to modifying gravity which leads to a late-time accelerated expansion without recourse to a new form of dark energy.
hep-th/0603062 [abs, ps, pdf, other] :: Title: The oscillating dark energy: future singularity and coincidence problem
Authors: Shin'ichi Nojiri, Sergei D. Odintsov
Comments: LaTeX file, 8 pages

We consider the oscillating dark energy with periodic equation of state in two equivalent formulations: ideal fluid or scalar-tensor theory. It is shown that such dark energy suggests the natural way for the unification of early-time inflation with late-time acceleration. We demonstrate how it describes the transition from deceleration to acceleration or from non-phantom to phantom era and how it solves the coincidence problem. The occurence of finite-time future singularity for the oscillating (phantom) universe is also investigated.
hep-th/0603076 [abs, ps, pdf, other] :: Title: Collision of Domain Walls in asymptotically Anti de Sitter spacetime
Authors: Yu-ichi Takamizu, Kei-ichi Maeda
Comments: 12 pages, 19 figures

We study collision of two domain walls in 5-dimensional asymptotically Anti de Sitter spacetime. This may provide the reheating mechanism of an ekpyrotic (or cyclic) brane universe, in which two BPS branes collide and evolve into a hot big bang universe. We evaluate a change of scalar field making the domain wall and can investigate the effect of a negative cosmological term in the bulk to the collision process and the evolution of our universe.
nucl-th/0602052 [abs, ps, pdf, other] :: Title: Testing Deconfinement at High Isospin Density
Authors: M. Di Toro, A.Drago, T.Gaitanos, V.Greco, A.Lavagno
Comments: 32 pages, 14 figures, elsart latex

We study the transition from hadronic matter to a mixed phase of quarks and hadrons at high baryon and isospin densities reached in heavy ion collisions. We focus our attention on the role played by the nucleon symmetry energy at high density.In this respect the inclusion of a scalar isovector meson, the \delta-coupling, in the Hadron Lagrangian appears rather important. We study in detail the formation of a drop of quark matter in the mixed phase, and we discuss the effects on the quark drop nucleation probability of the finite size and finite time duration of the high density region. We find that, if the parameters of quark models are fixed so that the existence of quark stars is allowed, then the density at which a mixed phase starts forming drops dramatically in the range Z/A \sim 0.3--0.4. This opens the possibility to verify the Witten-Bodmer hypothesis on absolute stability of quark matter using ground-based experiments in which neutron-rich nuclei are employed. These experiments can also provide rather stringent constraints on the Equation of State (EoS) to be used for describing the pre-Supernova gravitational collapse. Consistent simulations of neutron rich heavy ion collisions are performed in order to show that even at relatively low energies, in the few AGeV range, the system can enter such unstable mixed phase. Some precursor observables are suggested, in particular a ``neutron trapping'' effect.

Replacements

astro-ph/0405005 [abs, ps, pdf, other] :: Title: Gamma ray bursts and the origin of galactic positrons
Authors: Gianfranco Bertone, Alexander Kusenko, Sergio Palomares-Ruiz, Silvia Pascoli, Dmitry Semikoz
Comments: 12 pages; substantial changes; to appear in Phys. Lett. B
Note: replaced with revised version Fri, 10 Mar 2006 18:47:47 GMT (14kb)
astro-ph/0510305 [abs, ps, pdf, other] :: Title: Hydraulic/Shock-Jumps in Protoplanetary Disks
Authors: A. C. Boley, R. H. Durisen
Comments: 39 pages, 18 figures, 1 table. Edited to match as closely as possible the ApJ proofs, which resulted in the correction of several typos. In addition, section 5.3 was slightly altered because an error in an analysis tool was discovered; the differences between the entropy gradient method and the Schwarzschild criterion method are minor. Figure 18 now only includes what was Figure18a
Note: replaced with revised version Fri, 10 Mar 2006 20:48:46 GMT (900kb)
astro-ph/0511647 [abs, ps, pdf, other] :: Title: Apparent Hubble acceleration from large-scale electroweak domain structure
Authors: Tommy Anderberg
Comments: 14 pages, 7 figures. New section, remarks, references added
Note: replaced with revised version Fri, 10 Mar 2006 20:08:50 GMT (201kb)
astro-ph/0512631 [abs, ps, pdf, other] :: Title: Linear Cosmological Structure Limits on Warm Dark Matter
Authors: Kevork Abazajian (LANL)
Comments: 6 pages, 4 figures; v2: matches PRD version, with note added regarding astro-ph/0602430
Note: replaced with revised version Fri, 10 Mar 2006 00:32:26 GMT (49kb)
astro-ph/0601226 [abs, ps, pdf, other] :: Title: The Born and Lens-Lens Corrections to Weak Gravitational Lensing Angular Power Spectra
Authors: Charles Shapiro (Chicago/KICP), Asantha Cooray (UC Irvine)
Comments: Added references, minor changes to text. 9 pages, 2 figures
Journal-ref: JCAP 03 (2006) 007
Note: replaced with revised version Fri, 10 Mar 2006 14:54:15 GMT (70kb)
astro-ph/0602228 [abs, ps, pdf, other] :: Title: Chandra and Spitzer unveil heavily obscured quasars in the SWIRE/Chandra Survey
Authors: M. Polletta (UCSD), B.J. Wilkes (CfA), B. Siana (SSC/Caltech), C.J. Lonsdale (UCSD, Caltech), R. Kilgard (CfA), H.E. Smith (UCSD), D.-W. Kim (CfA), F. Owen (NRAO), A. Efstathiou (Cyprus), T. Jarrett (IPAC/Caltech), G. Stacey (Cornell), A. Franceschini (Padua U.), M. Rowan-Robinson, T.S.R. Babbedge (IC), S. Berta (Padua U.), F. Fang (SSC/Caltech), D. Farrah (Cornell), E. Gonzalez-Solares (Cambridge), G. Morrison (Univ. of Hawaii), J.A. Surace, D.L. Shupe (SSC/Caltech)
Comments: ApJ accepted (to appear in May 2006 issue, vol. 642, of ApJ) Figures 2, 3, and 14 have been degraded due to space considerations
Note: replaced with revised version Fri, 10 Mar 2006 00:09:56 GMT (781kb)
astro-ph/0602462 [abs, ps, pdf, other] :: Title: Modified equation of state, scalar field, and bulk viscosity in Friedmann universe
Authors: J.Ren, X. H. Meng
Comments: 4 figs, plb
Note: replaced with revised version Fri, 10 Mar 2006 14:33:14 GMT (20kb)
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, submitted to MNRAS, typos corrected and some references added
Note: replaced with revised version Fri, 10 Mar 2006 10:58:23 GMT (55kb)
astro-ph/0603240 [abs, ps, pdf, other] :: Title: The dipole of the luminosity distance: a direct measure of H(z)
Authors: Camille Bonvin, Ruth Durrer, Martin Kunz (University of Geneva)
Comments: 4 pages, 4 figures
Note: replaced with revised version Fri, 10 Mar 2006 09:35:45 GMT (21kb)
astro-ph/0603248 [abs, ps, pdf, other] :: Title: Probing the Coevolution of Supermassive Black Holes and Galaxies Using Gravitationally Lensed Quasar Hosts
Authors: C. Y. Peng (1), C. D. Impey (2), H.-W. Rix (3), C. S. Kochanek (4), C. R. Keeton (5), E. E. Falco (6), J. Lehar (7), B. A. McLeod (6) ((1) Space Telescope Science Institute, (2) Steward Observatory, University of Arizona, (3) Max Planck Institut Fur Astronomie, (4) Ohio State University, (5) Rutgers University, (6) Harvard-Smithsonian Center for Astrophysics, (7) CombinatoRx)
Comments: ApJ submitted. 23 pages, 11 figures, 4 tables
Note: replaced with revised version Fri, 10 Mar 2006 02:02:19 GMT (980kb)
hep-ph/0508070 [abs, ps, pdf, other] :: Title: Temperature of the inflaton and duration of inflation from WMAP data
Authors: Kaushik Bhattacharya, Subhendra Mohanty, Raghavan Rangarajan
Comments: The analysis is made more general, some typos corrected and one figure modified. 4 pages, 2 figures, revtex file. To be published in Physical Review Letters
Note: replaced with revised version Fri, 10 Mar 2006 07:02:16 GMT (322kb)
hep-ph/0510389 [abs, ps, pdf, other] :: Title: IceHEP High Energy Physics at the South Pole
Authors: Luis Anchordoqui, Francis Halzen
Comments: Typos corrected and references added. Version with high resolution figures available at this http URL
Note: replaced with revised version Fri, 10 Mar 2006 12:51:15 GMT (505kb)
hep-ph/0603064 [abs, ps, pdf, other] :: Title: How Nuclear Diffuseness Affects RHIC Data
Authors: Klaus Werner
Note: replaced with revised version Fri, 10 Mar 2006 08:45:26 GMT (67kb)

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hep-ph/0511154 [abs, ps, pdf, other] :: Title: The supersymmetric interpretation of the EGRET excess of diffuse Galactic gamma rays
Authors: W. de Boer (1), C. Sander (1), V. Zhukov (1), A.V. Gladyshev (2), D.I. Kazakov (2) ((1) Univ. Karlsruhe (2) JINR (Dubna))
Comments: 11 pages, 6 figures, extended version with more figures, as accepted for publication in Phys. Letters B

Recently it was shown that the excess of diffuse Galactic gamma rays above 1 GeV traces the Dark Matter halo, as proven by reconstructing the peculiar shape of the rotation curve of our Galaxy from the gamma ray excess. This can be interpreted as a Dark Matter annihilation signal. In this paper we investigate if this interpretation is consistent with Supersymmetry. It is found that the EGRET excess combined with all electroweak constraints is fully consistent with the minimal mSUGRA model for scalars in the TeV range and gauginos below 500 GeV.
hep-ph/0603077 [abs, ps, pdf, other] :: Title: Little Higgs Dark Matter
Authors: Andreas Birkedal, Andrew Noble, Maxim Perelstein, Andrew Spray
Comments: 22 pages, 9 figures

The introduction of T parity dramatically improves the consistency of Little Higgs models with precision electroweak data, and renders the lightest T-odd particle (LTP) stable. In the Littlest Higgs model with T parity, the LTP is typically the T-odd heavy photon, which is weakly interacting and can play the role of dark matter. We analyze the relic abundance of the heavy photon, including its coannihilations with other T-odd particles, and map out the regions of the parameter space where it can account for the observed dark matter. We evaluate the prospects for direct and indirect discovery of the heavy photon dark matter. The direct detection rates are quite low and a substantial improvement in experimental sensitivity would be required for observation. A substantial flux of energetic gamma rays is produced in the annihilation of the heavy photons in the galactic halo. This flux can be observed by the GLAST telescope, and, if the distribution of dark matter in the halo is favorable, by ground-based telescope arrays such as VERITAS and HESS.
nucl-th/0603028 [abs, ps, pdf, other] :: Title: Challenges about entropy
Authors: D.H.E.Gross
Comments: 7 pages, 1 figure, presnted at XILV internat. winter meeting on nuclear physics in Bormio(Italy) 2006, January 29- Febr. 5
Subj-class: Nuclear Theory; Statistical Mechanics

The physical meaning of entropy is analyzed in the context of statistical, nuclear, atomic physics and cosmology. Only the microcanonical Boltzmann entropy leads to no contradictions in several simple, elementary and for thermodynamics important situations. The conventional canonical statistics implies several serious errors and misinterpretations. This has far reaching consequences for phase-separations as well for the usual formulations of the second law. Applications in cosmology suffer under the ubiquitous use of canonical statistics. New reformulations in terms of microcanonical statistics are highly demanded but certainly difficult.
physics/0603071 [abs, ps, pdf, other] :: Title: Nonextensive statistical features of the Polish stock market fluctuations
Authors: R.Rak, S.Drozdz, J.Kwapien
Comments: 9 pages, 4 figures. To appear in Physica A
Subj-class: Data Analysis, Statistics and Probability; Computational Physics; Statistical Mechanics

The statistics of return distributions on various time scales constitutes one of the most informative characteristics of the financial dynamics. Here we present a systematic study of such characteristics for the Polish stock market index WIG20 over the period 04.01.1999 - 31.10.2005 for the time lags ranging from one minute up to one hour. This market is commonly classified as emerging. Still on the shortest time scales studied we find that the tails of the return distributions are consistent with the inverse cubic power-law, as identified previously for majority of the mature markets. Within the time scales studied a quick and considerable departure from this law towards a Gaussian can however be traced. Interestingly, all the forms of the distributions observed can be comprised by the single $q$-Gaussians which provide a satisfactory and at the same time compact representation of the distribution of return fluctuations over all magnitudes of their variation. The corresponding nonextensivity parameter $q$ is found to systematically decrease when increasing the time scales.
physics/0603086 [abs, ps, pdf, other] :: Title: The clustering of polarity reversals of the geomagnetic field
Authors: V. Carbone, L. Sorriso-Valvo, A. Vecchio, F. Lepreti, P. Veltri, P. Harabaglia, I. Guerra
Comments: 4 pages, in press on PRL (31 march 2006?)
Subj-class: Geophysics; Data Analysis, Statistics and Probability; Plasma Physics; Chaotic Dynamics

Often in nature the temporal distribution of inhomogeneous stochastic point processes can be modeled as a realization of renewal Poisson processes with a variable rate. Here we investigate one of the classical examples, namely the temporal distribution of polarity reversals of the geomagnetic field. In spite of the commonly used underlying hypothesis, we show that this process strongly departs from a Poisson statistics, the origin of this failure stemming from the presence of temporal clustering. We find that a Levy statistics is able to reproduce paleomagnetic data, thus suggesting the presence of long-range correlations in the underlying dynamo process.

Replacements

astro-ph/0504519 [abs, ps, pdf, other] :: Title: Cluster number counts dependence on dark energy inhomogeneities and coupling to dark matter
Authors: M. Manera, D. Mota
Comments: Major changes. The whole paper was re-written: from abstract to conclusions. Two new sections added. New references added
Note: replaced with revised version Mon, 13 Mar 2006 13:24:18 GMT (212kb)
astro-ph/0506141 [abs, ps, pdf, other] :: Title: Resonant absorption in dissipative flux tubes
Authors: H. Safari, S. Nasiri, K. Karami, Y. Sobouti
Comments: A&A accepted 2006, 8 pages, 4 figures
Note: replaced with revised version Mon, 13 Mar 2006 12:43:00 GMT (104kb)
astro-ph/0509089 [abs, ps, pdf, other] :: Title: Best median values for cosmological parameters
Authors: Matts Roos
Comments: This review is now based on five recent multiparameter fits rather than four. Table II has been replaced and some minor matters corrected. 6 pages
Note: replaced with revised version Mon, 13 Mar 2006 11:56:24 GMT (11kb)
astro-ph/0509447 [abs, ps, pdf, other] :: Title: Gravitational Waves from Phase-Transition Induced Collapse of Neutron Stars
Authors: L.-M. Lin, K. S. Cheng, M.-C. Chu, W.-M. Suen
Comments: Minor changes to match the published version in ApJ
Journal-ref: Astrophys.J. 639 (2006) 382
Note: replaced with revised version Mon, 13 Mar 2006 10:47:42 GMT (167kb)
astro-ph/0509882 [abs, ps, pdf, other] :: Title: GaBoDS: The Garching-Bonn Deep Survey V. Data release of the ESO Deep-Public-Survey
Authors: H. Hildebrandt, T. Erben, J. P. Dietrich, O. Cordes, L. Haberzettl, M. Hetterscheidt, M. Schirmer, O. Schmithuesen, P. Schneider, P. Simon, C. Trachternach
Comments: 20 pages, 7 figures, accepted by A&A, minor changes, full resolution version available at this http URL
Note: replaced with revised version Mon, 13 Mar 2006 10:02:18 GMT (192kb)
astro-ph/0510449 [abs, ps, pdf, other] :: Title: Intergalactic Photon Spectra from the Far IR to the UV Lyman Limit for $0 < z < 6$ and the Optical Depth of the Universe to High Energy Gamma-Rays
Authors: F.W. Stecker (NASA/GSFC and Ucla), M.A. Malkan (UCLA), S.T. Scully (JMU)
Comments: expanded version (38 pages, 12 figs.) new results with correced 60 micron luminosity funct., subm. to ApJ
Note: replaced with revised version Mon, 13 Mar 2006 14:16:31 GMT (493kb)
astro-ph/0511383 [abs, ps, pdf, other] :: Title: Milli-arcsecond--scale Spectral Properties and Jet Motions in M87
Authors: Richard Dodson, Philip G. Edwards, Hisashi Hirabayashi
Comments: To appear in PASJ VSOP special issue. Minor corrections
Note: replaced with revised version Mon, 13 Mar 2006 13:16:22 GMT (548kb)
astro-ph/0511736 [abs, ps, pdf, other] :: Title: The Curvaton Web
Authors: Andrei Linde, Viatcheslav Mukhanov
Comments: 15 pages, 3 figures, references added, discussion of long-wavelenth perturbations expanded
Note: replaced with revised version Mon, 13 Mar 2006 14:23:18 GMT (612kb)
astro-ph/0512004 [abs, ps, pdf, other] :: Title: What galaxies know about their nearest cluster
Authors: Alejandro D. Quintero, Andreas A. Berlind, Michael R. Blanton, David W. Hogg
Comments: Submitted to ApJ
Note: replaced with revised version Sun, 12 Mar 2006 22:49:31 GMT (103kb)
astro-ph/0512154 [abs, ps, pdf, other] :: Title: Implications for the Cosmic Reionization from the Optical Afterglow Spectrum of the Gamma-Ray Burst 050904 at z = 6.3
Authors: Tomonori Totani (1), Nobuyuki Kawai (2), George Kosugi (3), Kentaro Aoki (3), Toru Yamada (3), Masanori Iye (3), Kouji Ohta (1), Takashi Hattori (3) ((1) Kyoto, (2) TITech, (3) NAO)
Comments: Accepted to PASJ. Two new figures added for a better presentation. No changes in conclusions. The version with full resolution figures is available at this http URL
Note: replaced with revised version Sat, 11 Mar 2006 13:15:53 GMT (133kb)
astro-ph/0512183 [abs, ps, pdf, other] :: Title: Reduced Wolf-Rayet Line Luminosities at Low Metallicity
Authors: Paul A Crowther, L J Hadfield (Sheffield)
Comments: 14 pages, 12 figures, accepted for A&A, revision fixes error with Eqn 1
Journal-ref: Vol 449 (March 2006)
Note: replaced with revised version Mon, 13 Mar 2006 11:33:15 GMT (989kb)
astro-ph/0601052 [abs, ps, pdf, other] :: Title: The Paths of Quintessence
Authors: Eric V. Linder
Comments: 12 pages, 7 figures; matches PRD version
Note: replaced with revised version Mon, 13 Mar 2006 17:57:33 GMT (38kb)
astro-ph/0601229 [abs, ps, pdf, other] :: Title: GeV-TeV and X-ray flares from gamma-ray bursts
Authors: Xiang-Yu Wang (PSU, NJU), Zhuo Li (Weizmann Inst), Peter Meszaros (PSU)
Comments: slightly shortened version, accepted for publication in ApJ Letters, 4 emulateapj pages, no figures
Note: replaced with revised version Mon, 13 Mar 2006 20:17:21 GMT (9kb)
astro-ph/0601427 [abs, ps, pdf, other] :: Title: The non-Gaussian Cold Spot in WMAP: significance, morphology and foreground contribution
Authors: M. Cruz, M. Tucci, E. Martinez-Gonzalez, P. Vielva
Comments: 11 pages, 8 figures, submitted to MNRAS
Note: replaced with revised version Mon, 13 Mar 2006 18:58:49 GMT (279kb)
astro-ph/0603056 [abs, ps, pdf, other] :: Title: Faint Supernovae and Supernova Impostors: Case studies of SN2002kg/NGC2403-V37 and SN 2003gm
Authors: J.R. Maund, S.J. Smartt, R.-P. Kudritzki, A. Pastorello, G. Nelemans, F. Bresolin, F. Patat, G.F. Gilmore, C.R. Benn
Comments: 17 pages, 17 figures (4 jpg), MNRAS accepted, 4 typos corrected
Note: replaced with revised version Sun, 12 Mar 2006 20:34:40 GMT (431kb)
astro-ph/0603083 [abs, ps, pdf, other] :: Title: Spectropolarimetry of the Peculiar Type Ia SN 2005hk
Authors: Ryan Chornock, Alexei V. Filippenko, David Branch, Ryan J. Foley, Saurabh Jha, Weidong Li
Comments: 20 pages, 1 table, 5 figures, to appear in May 06 issue of PASP, revised to match accepted version
Note: replaced with revised version Fri, 10 Mar 2006 22:15:08 GMT (106kb)
astro-ph/0603125 [abs, ps, pdf, other] :: Title: A deep kinematic survey of planetary nebulae in the Andromeda Galaxy using the Planetary Nebula Spectrograph
Authors: H. R. Merrett, M. R. Merrifield, N. G. Douglas, K. Kuijken, A. J. Romanowsky, N. R. Napolitano, M. Arnaboldi, M. Capaccioli, K. C. Freeman, O. Gerhard, L. Coccato, D. Carter, N. W. Evans, M. I. Wilkinson, C. Halliday, T. J. Bridges
Comments: Accepted by MNRAS. 23 pages, 37 figures. A full resolution version is available at this http URL
Note: replaced with revised version Mon, 13 Mar 2006 11:22:15 GMT (511kb)
astro-ph/0603142 [abs, ps, pdf, other] :: Title: Constraints from the Old Quasar Apm 08279+5255 on Two Classes of $\Lambda($t$)$-Cosmologies
Authors: J. F. Jesus
Comments: 7 pages, 3 figures, job presented at the IWARA 2005, to be published at IJMPD
Note: replaced with revised version Mon, 13 Mar 2006 16:02:39 GMT (69kb)
astro-ph/0603172 [abs, ps, pdf, other] :: Title: Formation of Small-Scale Condensations in the Molecular Clouds via Thermal Instability
Authors: Mohsen Nejad-Asghar, Jamshid Ghanbari
Comments: 16 page, accepted by Ap&SS
Note: replaced with revised version Sun, 12 Mar 2006 08:30:01 GMT (155kb)
astro-ph/0603247 [abs, ps, pdf, other] :: Title: Reduction of Cosmological Data for the Detection of Time-varying Dark Energy Density
Authors: Jason Dick, Lloyd Knox, Mike Chu
Comments: 10 pages, 9 figures; Updated submission note, acknowledgements
Note: replaced with revised version Mon, 13 Mar 2006 20:56:49 GMT (160kb)
gr-qc/0511003 [abs, ps, pdf, other] :: Title: Chaplygin traversable wormholes
Authors: Francisco S. N. Lobo
Comments: 9 pages, 2 figures, Revtex4. V2: Considerable comments and references added, now 10 pages
Note: replaced with revised version Sat, 11 Mar 2006 10:50:01 GMT (23kb)
gr-qc/0603005 [abs, ps, pdf, other] :: Title: Theoretical Basis for a Solution to the Cosmic Coincidence Problem
Authors: Christophe Nickner
Comments: 21 pages, REVTeX4, submitted to Physical Review D (fixed references)
Note: replaced with revised version Sun, 12 Mar 2006 00:50:13 GMT (38kb)
hep-ph/0509285 [abs, ps, pdf, other] :: Title: Dark matter and leptogenesis in gauged B-L symmetric models embedding $\nu$ MSM
Authors: Narendra Sahu, Urjit A Yajnik
Comments: Journal version
Journal-ref: Phys.Lett.B635, 11-16 (2006)
Note: replaced with revised version Sun, 12 Mar 2006 05:53:56 GMT (28kb)
hep-ph/0512320 [abs, ps, pdf, other] :: Title: Classification of dark energy models in the (w_0,w_a) plane
Authors: V. Barger, E. Guarnaccia, D Marfatia
Comments: 11 pages, 3 figures. Classification generalized to include models for which the equation of state crosses the phantom divide line. Published version
Journal-ref: Phys.Lett. B635 (2006) 61-65
Note: replaced with revised version Fri, 10 Mar 2006 21:40:01 GMT (569kb)
hep-ph/0601080 [abs, ps, pdf, other] :: Title: F_D-Term Hybrid Inflation with Electroweak-Scale Lepton Number Violation
Authors: Bjorn Garbrecht, Apostolos Pilaftsis
Comments: 19 pages, 1 eps figure, minor rewordings
Note: replaced with revised version Mon, 13 Mar 2006 17:34:34 GMT (26kb)
hep-th/0601110 [abs, ps, pdf, other] :: Title: Exact Black Holes and Gravitational Shockwaves on Codimension-2 Branes
Authors: Nemanja Kaloper, Derrick Kiley
Comments: 18 pages, LaTeX; v2: added references, version to appear in JHEP
Note: replaced with revised version Sun, 12 Mar 2006 03:30:59 GMT (24kb)

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Cross-listings

gr-qc/0603035 [abs, ps, pdf, other] :: Title: General Relativistic Effects of Gravity in Quantum Mechanics -- A Case of Ultra-Relativistic, Spin 1/2 Particles --
Authors: Kohkichi Konno, Masumi Kasai
Comments: 13 pages (PTPTeX)
Journal-ref: Prog. Theor. Phys. 100 (1998), 1145-1157

We present a general relativistic framework for studying gravitational effects in quantum mechanical phenomena. We concentrate our attention on the case of ultra-relativistic, spin-1/2 particles propagating in Kerr spacetime. The two-component Weyl equation with general relativistic corrections is obtained in the case of a slowly rotating, weak gravitational field. Our approach is also applied to neutrino oscillations in the presence of a gravitational field. The relative phase of two different mass eigenstates is calculated in radial propagation, and the result is compared with those of previous works.
gr-qc/0603039 [abs, ps, pdf, other] :: Title: A simple accretion model of a rotating gas sphere onto a Schwarzschild black hole
Authors: E. A. Huerta, S. Mendoza
Comments: 19 pages, 5 figures

We construct a simple accretion model of a rotating pressureless gas sphere onto a Schwarzschild black hole. We show how to build analytic solutions in terms of Jacobi elliptic functions. This construction represents a general relativistic generalisation of the Newtonian accretion model first proposed by Ulrich (1976). In exactly the same form as it occurs for the Newtonian case, the flow naturally predicts the existence of an equatorial rotating accretion disc about the hole. However, the radius of the disc increases monotonically without limit as the flow reaches its maximum allowed angular momentum.
gr-qc/0603045 [abs, ps, pdf, other] :: Title: Closed timelike curves in asymmetrically warped brane universes
Authors: Heinrich Päs, Sandip Pakvasa (Hawaii), Thomas J. Weiler (Vanderbilt)
Comments: 13 pages, 2 figures

We discuss causality properties of asymmetrically warped space-times and argue that such scenarios may allow for timelike curves which can be closed via paths in the extra-dimensional bulk. We find a metric where the null, weak and dominant energy conditions are violated in the bulk, but satisfied on the brane. Such scenarios are interesting, since in principle gravitons or gauge-singlet (``sterile'') fermions propagating in the extra dimension may be manipulated in a way to test the chronology protection conjecture experimentally.
nlin.CD/0603024 [abs, ps, pdf, other] :: Title: A non subjective approach to the GP algorithm for analysing noisy time series
Authors: K. P. Harikrishnan (The Cochin College), R. Misra (IUCAA), G. Ambika (Maharajas College), A. K. Kembhavi (IUCAA)
Comments: Accepted for publication in Physica D. A numerical code which implements the scheme is available at this http URL
Subj-class: Chaotic Dynamics

We present an adaptation of the standard Grassberger-Proccacia (GP) algorithm for estimating the Correlation Dimension of a time series in a non subjective manner. The validity and accuracy of this approach is tested using different types of time series, such as, those from standard chaotic systems, pure white and colored noise and chaotic systems added with noise. The effectiveness of the scheme in analysing noisy time series, particularly those involving colored noise, is investigated. An interesting result we have obtained is that, for the same percentage of noise addition, data with colored noise is more distinguishable from the corresponding surrogates, than data with white noise. As examples for real life applications, analysis of data from an astrophysical X-ray object and human brain EEG, are presented.
physics/0603087 [abs, ps, pdf, other] :: Title: Cooling in the Universe
Authors: Sohrab Rahvar
Comments: 4 pages, Persian version of this pedagogical paper is submitted to Iranian Journal of Physics
Subj-class: Physics Education

One of the questions in the cosmology courses is the cooling mechanism of cosmic fluid during it expansion according to classical concepts of the thermodynamics. In this short pedagogical paper, we quote the questions and give a natural approach dealing with this problem by measuring the dispersion velocity of the particles in the cosmic fluid by a comoving observer. We show that the thermal motion of the particles in the cosmic fluid deviates from the Hubble flow and follows the geodesics governed by the gravity of the homogeneous universe. The dynamics of the "thermal peculiar velocity" of the particles leads in an expanding universe, momentum of the particles relax by the inverse of the expansion factor and the result is losing the energy of particles, hence cooling the universe.

Replacements

astro-ph/0512135 [abs, ps, pdf, other] :: Title: Dark Energy Anisotropic Stress and Large Scale Structure Formation
Authors: Tomi Koivisto, David F. Mota
Comments: Typos corrected. References added. Accepted for publication in Phys. Rev. D
Note: replaced with revised version Mon, 13 Mar 2006 21:44:52 GMT (59kb)
astro-ph/0512168 [abs, ps, pdf, other] :: Title: A Chandra X-ray observation of the globular cluster Terzan 1
Authors: E. M. Cackett (University of St Andrews), R. Wijnands, C. O. Heinke, D. Pooley, W. H. G. Lewin, J. E. Grindlay, P. D. Edmonds, P. G. Jonker, J. M. Miller
Comments: 10 pages, 4 figures, 2 tables. Accepted for publication in MNRAS
Note: replaced with revised version Tue, 14 Mar 2006 15:17:17 GMT (293kb)
astro-ph/0601427 [abs, ps, pdf, other] :: Title: The non-Gaussian Cold Spot in WMAP: significance, morphology and foreground contribution
Authors: M. Cruz, M. Tucci, E. Martinez-Gonzalez, P. Vielva
Comments: 13 pages, 8 figures, minor changes, accpeted in MNRAS
Note: replaced with revised version Tue, 14 Mar 2006 09:47:57 GMT (279kb)
astro-ph/0601446 [abs, ps, pdf, other] :: Title: Period-color and amplitude-color relations in classical Cepheid variables III: The Large Magellanic Cloud Cepheid models
Authors: Shashi Kanbur (SUNY-Oswego), Chow-Choong Ngeow (UIUC)
Comments: 19 pages, 6 tables and 18 figures, MNRAS accepted
Note: replaced with revised version Tue, 14 Mar 2006 18:35:53 GMT (566kb)
astro-ph/0601447 [abs, ps, pdf, other] :: Title: Period-colour and amplitude-colour relations in classical Cepheid variables IV: The multi-phase relations
Authors: Chow-Choong Ngeow (UIUC), Shashi Kanbur (SUNY-Oswego)
Comments: 12 pages, 1 table and 13 figures, MNRAS accepted
Note: replaced with revised version Tue, 14 Mar 2006 19:01:36 GMT (823kb)
astro-ph/0602285 [abs, ps, pdf, other] :: Title: Non-gaussianity and cosmic uncertainty in curvaton-type models
Authors: D. H. Lyth
Comments: 19 pages, gaussianity plus tilt now for just one non-inflaton field, more on anthropic status of curvaton model. numerous other additions
Note: replaced with revised version Tue, 14 Mar 2006 14:52:38 GMT (42kb)
astro-ph/0603319 [abs, ps, pdf, other] :: Title: Old Main-Sequence Turnoff Photometry in the SMC
Authors: Noelia E. D. Noel (1), Carme Gallart (1), Edgardo Costa (2), Rene A. Mendez (2) ((1) Instituto de Astrofisica de Canarias, (2) Departamento de Astronomia, Universidad de Chile)
Comments: 2 pages, 2 figures, contributed talk to the 11th Latin American Regional IAU Meeting, Pucon, Chile, 2005. To be published by Revista Mexicana de Astronomia y Astrofisica, Conference Series (rmaa.cls). High resolution figures (noel_n_fig1.eps and noel_n_fig2.eps) are available via ftp from this ftp URL
Note: replaced with revised version Tue, 14 Mar 2006 09:21:45 GMT (321kb)
hep-th/0509043 [abs, ps, pdf, other] :: Title: On the Transfer of Metric Fluctuations when Extra Dimensions Bounce or Stabilize
Authors: T. J. Battefeld, S. P. Patil, R. H. Brandenberger
Comments: V2. Minor Clarifications V3. appendix and 2 figures added, typos corrected, conclusions unchanged 12 pages, 6 figures
Note: replaced with revised version Tue, 14 Mar 2006 20:00:25 GMT (707kb)
hep-th/0510210 [abs, ps, pdf, other] :: Title: Enhanced gravitational scattering from large extra dimensions
Authors: Kazuya Koyama, Federico Piazza, David Wands (ICG, Portsmouth)
Comments: 9 pages, section on quantum suppression effects added
Note: replaced with revised version Tue, 14 Mar 2006 12:59:27 GMT (12kb)
quant-ph/0601129 [abs, ps, pdf, other] :: Title: Swapping and permutation operators as entanglement witnesses for quantum Heisenberg spin-$s$ systems
Authors: Guang-Ming Zhang, Xiaoguang Wang
Comments: 8 pages, no figures
Subj-class: Quantum Physics; Statistical Mechanics
Note: replaced with revised version Tue, 14 Mar 2006 03:09:16 GMT (12kb)

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gr-qc/0603048 [abs, ps, pdf, other] :: Title: Rotating star initial data for a constrained scheme in numerical relativity
Authors: Lap-Ming Lin, Jerome Novak
Comments: 17 pages, 7 figures

A new numerical code for computing stationary axisymmetric rapidly rotating stars in general relativity is presented. The formulation is based on a fully constrained-evolution scheme for 3+1 numerical relativity using the Dirac gauge and maximal slicing. We use both the polytropic and MIT bag model equations of state to demonstrate that the code can construct rapidly rotating neutron star and strange star models. We compare numerical models obtained by our code and a well-established code, which uses a different gauge condition, and show that the two codes agree to high accuracy.
gr-qc/0603049 [abs, ps, pdf, other] :: Title: The weakly perturbed Schwarzschild lens in the strong deflection limit
Authors: V. Bozza, M. Sereno
Comments: 12 pages, 1 figures

We investigate the strong deflection limit of gravitational lensing by a Schwarzschild black hole embedded in an external gravitational field. The study of this model, analogous to the Chang & Refsdal lens in the weak deflection limit, is important to evaluate the gravitational perturbations on the relativistic images that appear in proximity of supermassive black holes hosted in galactic centers. By a simple dimensional argument, we prove that the tidal effect on the light ray propagation mainly occurs in the weak field region far away from the black hole and that the external perturbation can be treated as a weak field quadrupole term. We provide a description of relativistic critical curves and caustics and discuss the inversion of the lens mapping. Relativistic caustics are shifted and acquire a finite diamond shape. Sources inside the caustics produce four sequences of relativistic images. On the other hand, retro-lensing caustics are only shifted while remaining point-like to the lowest order.
hep-th/0601028 [abs, ps, pdf, other] :: Title: Taming the Runaway Problem of Inflationary Landscapes
Authors: Lawrence J. Hall, Taizan Watari, T. T. Yanagida
Comments: 31 pages, including 3 figures

A wide variety of vacua, and their cosmological realization, may provide an explanation for the apparently anthropic choices of some parameters of particle physics and cosmology. If the probability on various parameters is weighted by volume, a flat potential for slow-roll inflation is also naturally understood, since the flatter the potential the larger the volume of the sub-universe. However, such inflationary landscapes have a serious problem, predicting an environment that makes it exponentially hard for observers to exist and giving an exponentially small probability for a moderate universe like ours. A general solution to this problem is proposed, and is illustrated in the context of inflaton decay and leptogenesis, leading to an upper bound on the reheating temperature in our sub-universe. In a particular scenario of chaotic inflation and non-thermal leptogenesis, predictions can be made for the size of CP violating phases, the rate of neutrinoless double beta decay and, in the case of theories with gauge-mediated weak scale supersymmetry, for the fundamental scale of supersymmetry breaking.

Replacements

astro-ph/0410350 [abs, ps, pdf, other] :: Title: Collimated high-energy photons and others possible observational effects of the photon angular and spectral distribution in gamma-ray bursts sources
Authors: V.V. Sokolov, V.G. Kurt, G.S. Bisnovatyi-Kogan, Yu.N. Gnedin, Yu.V. Baryshev, T. A. Fatkhullin, V. S. Lebedev
Comments: he modified version for the journal. Two paragraphs were corrected near formula (1)
Journal-ref: Bull. Spec. Astrophys. Obs., 2005, 59, 5-17
Note: replaced with revised version Wed, 15 Mar 2006 12:38:49 GMT (32kb)
astro-ph/0509915 [abs, ps, pdf, other] :: Title: Accretion of helium and metal-rich gas onto neutron stars and black holes at high luminosities
Authors: J. Dunkel, J. Chluba, R. A. Sunyaev
Comments: 10 pages
Journal-ref: Astron. Lett., 32(4), pp. 288-294 (2006)
Note: replaced with revised version Wed, 15 Mar 2006 14:20:48 GMT (12kb)
astro-ph/0510786 [abs, ps, pdf, other] :: Title: Adaptive Mesh Refinement Simulations of the Ionization Structure and Kinematics of Damped Ly$\alpha$ Systems with Self-consistent Radiative Transfer
Authors: Alexei O. Razoumov, Michael L. Norman, Jason X. Prochaska, Arthur M. Wolfe
Comments: 13 pages, 11 figures, updated version, accepted to ApJ
Note: replaced with revised version Wed, 15 Mar 2006 20:46:17 GMT (630kb)
astro-ph/0512498 [abs, ps, pdf, other] :: Title: Clustering of ultra-high energy cosmic ray arrival directions on medium scales
Authors: M.Kachelriess, D.V.Semikoz
Comments: 12 pages, 5 figures; v2: added discussion of penalty factor and experimental exposures
Note: replaced with revised version Wed, 15 Mar 2006 12:37:50 GMT (81kb)
astro-ph/0512623 [abs, ps, pdf, other] :: Title: A MMT/Hectospec Redshift Survey of 24 Micron Sources in the Spitzer First Look Survey
Authors: Casey Papovich (1), Richard Cool (1), Daniel Eisenstein (1), Emeric Le Floc'h (1), Xiaohui Fan (1), Robert C. Kennicutt, Jr. (1), J.-D. T. Smith (1), G. H. Rieke (1), Marianne Vestergaard (1), ((1) Steward Observatory, University of Arizona)
Comments: Accepted for publication in the Astronomical Journal, AASTEX format, 23 pages, 7 figures (some in color). This replacement is the accepted version, and includes minor changes from previous version. Data tables and spectra available at this http URL or at this http URL
Note: replaced with revised version Wed, 15 Mar 2006 17:30:20 GMT (228kb)
astro-ph/0601002 [abs, ps, pdf, other] :: Title: A Cosmic Milestone: Constraints from Metal-Poor Halo Stars on the Cosmological Reionization Epoch
Authors: Aparna Venkatesan (University of Colorado, Boulder)
Comments: Accepted by ApJ Letters; 5 pages, 2 figures. Minor revisions with expanded discussion, results unchanged
Note: replaced with revised version Tue, 14 Mar 2006 21:37:05 GMT (25kb)
astro-ph/0601660 [abs, ps, pdf, other] :: Title: Multifrequency observations of the jets in the radio galaxy NGC 315
Authors: R. A. Laing (1), J. R. Canvin (2,3), W. D. Cotton (4), A. H. Bridle (4) ((1) ESO, (2) University of Oxford, (3) University of Sydney, (4) NRAO)
Comments: 20 pages, 17 figures, accepted for publication in MNRAS. Minor corrections to match published version, including a short note on emission from the background galaxy FGC0110
Note: replaced with revised version Wed, 15 Mar 2006 16:56:21 GMT (549kb)
astro-ph/0603084 [abs, pdf] :: Title: On the similarity of Information Energy to Dark Energy
Authors: M.P.Gough, T.D.Carozzi, A.M.Buckley
Comments: 5 pages, no figures, no tables
Note: replaced with revised version Wed, 15 Mar 2006 14:47:12 GMT (114kb)
astro-ph/0603266 [abs, ps, pdf, other] :: Title: On horizons and the cosmic landscape
Authors: George F R Ellis
Comments: Revised to clarify claims; essential substance unchanged
Note: replaced with revised version Wed, 15 Mar 2006 09:59:23 GMT (5kb)
astro-ph/0603295 [abs, ps, pdf, other] :: Title: The Association of Compact Groups of Galaxies with Large-scale Structures
Authors: H. Andernach (1), R. Coziol (1) ((1) Depto. de Astronomia, Univ. Guanajuato, Mexico)
Comments: 5 pages, no figures, Proc. ESO Workshop "Groups of galaxies in the nearby Universe", Santiago, Chile, 5-9 Dec. 2005, ESO Astrophysics Symposia, eds. I. Saviane, V. Ivanov & J. Borissova, Springer-Verlag; very minor revision of text on 15 Mar 2006, added one reference
Note: replaced with revised version Wed, 15 Mar 2006 18:15:59 GMT (25kb)
astro-ph/0603334 [abs, ps, pdf, other] :: Title: Primordial Helium Abundance: A Reanalysis of the Izotov-Thuan Spectroscopic Sample
Authors: Masataka Fukugita, Masahiro Kawasaki
Comments: 12 pages, 3 figures, misplaced figures are corrected
Note: replaced with revised version Wed, 15 Mar 2006 02:48:08 GMT (40kb)
astro-ph/0603361 [abs, ps, pdf, other] :: Title: Identification of the Broad Solar Emission Features Near 117 nm
Authors: Eugene H. Avrett, Robert L. Kurucz, Rudolf Loeser
Comments: 5 pages, 4 figures, 1 table (Accepted for Astronomy & Astrophysics)
Note: replaced with revised version Wed, 15 Mar 2006 17:02:58 GMT (277kb)
astro-ph/0603364 [abs, ps, pdf, other] :: Title: X-ray emission from the blazar AO 0235+16: the XMM-Newton and Chandra point of view
Authors: C. M. Raiteri, M. Villata, M. Kadler, T. P. Krichbaum, M. Boettcher, L. Fuhrmann, M. Orio
Comments: In press for A&A
Note: replaced with revised version Wed, 15 Mar 2006 08:54:06 GMT (285kb)
gr-qc/0603035 [abs, ps, pdf, other] :: Title: General Relativistic Effects of Gravity in Quantum Mechanics -- A Case of Ultra-Relativistic, Spin 1/2 Particles --
Authors: Kohkichi Konno, Masumi Kasai
Comments: 13 pages (PTPTeX); typos added
Journal-ref: Prog. Theor. Phys. 100 (1998), 1145-1157
Note: replaced with revised version Wed, 15 Mar 2006 03:07:15 GMT (36kb)

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Cross-listings

gr-qc/0603056 [abs, ps, pdf, other] :: Title: Phasing of gravitational waves from inspiralling eccentric binaries at the third-and-a-half post-Newtonian order
Authors: Christian Koenigsdoerffer, Achamveedu Gopakumar
Comments: 22 pages including 2 figures; submitted to PRD

We obtain an efficient description for the dynamics of nonspinning compact binaries moving in inspiralling eccentric orbits to implement the phasing of gravitational waves from such binaries at the 3.5 post-Newtonian (PN) order. Our computation heavily depends on the phasing formalism, presented in [T. Damour, A. Gopakumar, and B. R. Iyer, Phys. Rev. D \textbf{70}, 064028 (2004)], and the 3PN accurate generalized quasi-Keplerian parametric solution to the conservative dynamics of nonspinning compact binaries moving in eccentric orbits, available in [R.-M. Memmesheimer, A. Gopakumar, and G. Sch\"afer, Phys. Rev. D \textbf{70}, 104011 (2004)]. The gravitational-wave (GW) polarizations $h_{+}$ and $h_{\times}$ with 3.5PN accurate phasing should be useful for the earth-based GW interferometers, current and advanced, if they plan to search for gravitational waves from inspiralling eccentric binaries. Our results will be required to do \emph{astrophysics} with the proposed space-based GW interferometers like LISA, BBO, and DECIGO.
gr-qc/0603061 [abs, ps, pdf, other] :: Title: Formalism for testing theories of gravity using lensing by compact objects. III: Braneworld gravity
Authors: Charles R. Keeton (Rutgers), A. O. Petters (Duke)
Comments: 12 pages, 2 figures; submitted

Braneworld gravity is a model that endows physical space with an extra dimension. In the type II Randall-Sundrum braneworld gravity model, the extra dimension modifies the spacetime geometry around black holes, and changes predictions for the formation and survival of primordial black holes. We develop a comprehensive analytical formalism for far-field black hole lensing in this model, using invariant quantities to compute all geometric optics lensing observables. We then make the first analysis of wave optics in braneworld lensing, working in the semi-classical limit. We show that wave optics offers the only realistic way to observe braneworld effects in black hole lensing. We point out that if primordial braneworld black holes exist, have mass M, and contribute a fraction f of the dark matter, then roughly 3e5 x f (M/1e-18 Msun)^(-1) of them lie within our Solar System. These objects, which we call "attolenses," would produce interference fringes in the energy spectra of gamma-ray bursts at energies ~210 (M/1e-18 Msun)^(-1) MeV (accessible with current or near-future technology). Primordial braneworld black holes spread throughout the universe could produce similar interference effects; the probability for "attolensing" may be non-negligible. If interference fringes were observed, the fringe spacing would yield a simple upper limit on M. Detection of a primordial black hole with M <~ 1e-19 Msun would challenge general relativity and favor the braneworld model. Further work on lensing tests of braneworld gravity must proceed into the physical optics regime, which awaits a description of the full spacetime geometry around braneworld black holes.

Replacements

astro-ph/0506041 [abs, ps, pdf, other] :: Title: The DEEP2 Galaxy Redshift Survey: The Galaxy Luminosity Function to z ~ 1
Authors: C. N. A. Willmer, S. M. Faber, D. C. Koo, B. J. Weiner, J. A. Newman, A. L. Coil, A. J. Connolly, C. Conroy, M. C. Cooper, M. Davis, D. P. Finkbeiner, B. F. Gerke, P. Guhathakurta, J. Harker, N. Kaiser, S. Kassin, N. P. Konidaris, L. Lin, G. Luppino, D. S. Madgwick, K. G. Noeske, A. C. Phillips, R. Yan
Comments: Accepted by ApJ, emulateapj format, 24 pages, 17 figures, 4 in JPEG, includes referee's comments
Note: replaced with revised version Thu, 16 Mar 2006 20:19:26 GMT (588kb)
astro-ph/0506061 [abs, ps, pdf, other] :: Title: Probing dark matter caustics with weak lensing
Authors: Raphael Gavazzi (LATT, Oxford Astrophysics), Roya Mohayaee (IAP), Bernard Fort (IAP)
Journal-ref: Astronomy and Astrophysics 445 (2006) p43-49
Note: replaced with revised version Thu, 16 Mar 2006 12:47:14 GMT (79kb)
astro-ph/0506091 [abs, ps, pdf, other] :: Title: Variable Chaplygin Gas
Authors: Zong-Kuan Guo, Yuan-Zhong Zhang
Comments: 9 pages, 1 figure, LaTeX2e, references added
Note: replaced with revised version Thu, 16 Mar 2006 14:27:41 GMT (16kb)
astro-ph/0506545 [abs, ps, pdf, other] :: Title: A Multi-wavelength study of the Pulsar PSR B1929+10 and its X-ray trail
Authors: Werner Becker, Michael Kramer, Axel Jessner, Ronald E. Taam, Jian J. Jia, Kwong S. Cheng, Roberto Mignani, Alberto Pellizzoni, Andrea de Luca, Agnieszka Slowikowska, Patrizia Caraveo
Comments: Accepted for publication in ApJ. A draft with higher resolution images can be found at this ftp URL
Note: replaced with revised version Thu, 16 Mar 2006 11:36:27 GMT (546kb)
astro-ph/0511042 [abs, ps, pdf, other] :: Title: A statistical study of SUMER spectral images: events, turbulence, and intermittency
Authors: E. Buchlin, J.-C. Vial, P. Lemaire
Comments: 10 pages, 13 figures, Astronomy & Astrophysics, in press
Note: replaced with revised version Thu, 16 Mar 2006 19:51:08 GMT (575kb)
astro-ph/0603010 [abs, ps, pdf, other] :: Title: Modeling Eclipses in the Classical Nova V Persei: The Role of the Accretion Disk Rim
Authors: A. W. Shafter, K. A. Misselt
Comments: Accepted for publication in The Astrophysical Journal. Thirty-nine pages, including 9 figures. V2 - updated to include additional references and related discussion to previous work overlooked in the original version, and to correct a typo in the ephemeris given in the abstract. V3 - A few minor typos have been corrected. The paper has been scheduled for the 20 June 2006 issue of the ApJ
Note: replaced with revised version Thu, 16 Mar 2006 18:23:11 GMT (311kb)
astro-ph/0603145 [abs, ps, pdf, other] :: Title: Merger of binary neutron stars to a black hole: Disk mass, short gamma-ray bursts, and quasinormal mode ringing
Authors: Masaru Shibata, Keisuke Taniguchi
Comments: 29 pages, 21 figures, references added, typos corrected, Phys.Rev.D in press
Note: replaced with revised version Wed, 15 Mar 2006 23:12:01 GMT (587kb)

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