Cross-listings

gr-qc/0702087 [abs, ps, pdf, other] :: Title: Renormalization-group running cosmologies and the generalized second law
Authors: R. Horvat
Comments: 8 pages

We explore some thermodynamical consequences of accelerated universes driven by a running cosmological constant (CC) from the renormalization group (RG). Application of the generalized second law (GSL) of gravitational thermodynamics to a framework where the running of the CC goes at the expense of energy transfer between vacuum and matter, strongly restricts the mass spectrum of a (hypothetical) theory controlling the CC running. We find that quantum effects driving the running of the CC should be dominated by a trans-planckian mass field, in marked contrast with the GUT-scale upper mass bo obtained by analyzing density perturbations for the running CC. The model shows compliance with the holographic principle.
gr-qc/0702088 [abs, ps, pdf, other] :: Title: Testing the Metric-Field Equations of Gravitation
Authors: L. V. Verozub
Comments: Latex, 6 pages, 7 figures

Physical consequences from gravitation equations based on Poincar\'{e} ideas of relativity of space and time in respect of measuring instruments are considered. The most interesting of them are the possibility of the existence of stable supermassive configurations $(10^{2} \div 10^{12} M_{\odot})$ which can exist in galactic centres, and an explanation of the acceleration of the Universe expansion as a manifestation of the gravitational force properties in the theory under consideration.
gr-qc/0702090 [abs, ps, pdf, other] :: Title: Detecting Seasonal Changes in the Fundamental Constants
Authors: Douglas J. Shaw
Comments: 4 pages, 1 figure
Subj-class: General Relativity and Quantum Cosmology; Atomic Physics

We show that if one or more of the `constants' of Nature can vary then their values, as measured in the laboratory, should oscillate over the year in a very particular way. These seasonal changes in the constants could well be detected, in the near future, with ground-based atomic clocks.
gr-qc/0702092 [abs, ps, pdf, other] :: Title: A solution for galactic disks with Yukawian gravitational potential
Authors: J. C. N. de Araujo, O. D. Miranda
Comments: 7 pages; 1 eps figure; to appear in General Relativity and Gravitation

We present a new solution for the rotation curves of galactic disks with gravitational potential of the Yukawa type. We follow the technique employed by Toomre in 1963 in the study of galactic disks in the Newtonian theory. This new solution allows an easy comparison between the Newtonian solution and the Yukawian one. Therefore, constraints on the parameters of theories of gravitation can be imposed, which in the weak field limit reduce to Yukawian potentials. We then apply our formulae to the study of rotation curves for a zero-thickness exponential disk and compare it with the Newtonian case studied by Freeman in 1970. As an application of the mathematical tool developed here, we show that in any theory of gravity with a massive graviton (this means a gravitational potential of the Yukawa type), a strong limit can be imposed on the mass (m_g) of this particle. For example, in order to obtain a galactic disk with a scale length of b ~ 10 kpc, we should have a massive graviton of m_g << 10^{-59} g. This result is much more restrictive than those inferred from solar system observations.
gr-qc/0702093 [abs, ps, pdf, other] :: Title: Gauge invariant perturbations around symmetry reduced sectors of general relativity: applications to cosmology
Authors: Bianca Dittrich, Johannes Tambornino
Comments: 39 pages, 1 figure

We develop a gauge invariant canonical perturbation scheme for perturbations around symmetry reduced sectors in generally covariant theories, such as general relativity. The central objects of investigation are gauge invariant observables which encode the dynamics of the system. We apply this scheme to perturbations around a homogeneous and isotropic sector (cosmology) of general relativity. The background variables of this homogeneous and isotropic sector are treated fully dynamically which allows us to approximate the observables to arbitrary high order in a self--consistent and fully gauge invariant manner. Methods to compute these observables are given. The question of backreaction effects of inhomogeneities onto a homogeneous and isotropic background can be addressed in this framework. We illustrate the latter by considering homogeneous but anisotropic Bianchi--I cosmologies as perturbations around a homogeneous and isotropic sector.
hep-ph/0702143 [abs, ps, pdf, other] :: Title: Gauge Singlet Scalars as Cold Dark Matter
Authors: John McDonald
Comments: 37 pages, 11 figures, LaTeX
Journal-ref: Phys. Rev. D50 (1994) 3637

In light of recent interest in minimal extensions of the Standard Model and gauge singlet scalar cold dark matter, we provide an arXiv preprint of the paper, published as Phys.Rev. D50 (1994) 3637, which presented the first detailed analysis of gauge singlet scalar cold dark matter.
physics/0702078 [abs, ps, pdf, other] :: Title: A Study of the LXeGRIT Detection Efficiency for MeV Gamma-Rays during the 2000 Balloon Flight Campaign
Authors: A. Curioni, E. Aprile, T. Doke, K.L. Giboni, M. Kobayashi, U.G. Oberlack
Comments: 20 pages, 15 figures; submitted to NIMA
Subj-class: Instrumentation and Detectors

LXeGRIT - Liquid Xenon Gamma-Ray Imaging Telescope - is the first prototype of a Compton telescope for \MeV \g-ray astrophysics based on a LXe time projection chamber. One of the most relevant figures of merit for a Compton telescope is the detection efficiency for \g-rays, which depends on diverse contributions such as detector geometry and passive materials, trigger efficiency, dead time, etc. A detailed study of the efficiency of the LXeGRIT instrument, based both on laboratory measurements and Monte Carlo simulations, is presented in this paper.

Replacements

astro-ph/0512262 [abs, ps, pdf, other] :: Title: Constraints on Fundamental Cosmological Parameters with Upcoming Redshifted 21 cm Observations
Authors: Judd D. Bowman (MIT), Miguel F. Morales, Jacqueline N. Hewitt
Comments: Replaced with version accepted by ApJ. 13 pages, including 4 figures and 5 tables
Note: replaced with revised version Fri, 16 Feb 2007 18:29:56 GMT (60kb)
astro-ph/0609120 [abs, ps, pdf, other] :: Title: The effect of inhomogeneous expansion on the supernova observations
Authors: Kari Enqvist, Teppo Mattsson
Comments: minor corrections to match the version published in JCAP
Journal-ref: JCAP02(2007)019
Note: replaced with revised version Fri, 16 Feb 2007 19:17:04 GMT (56kb)
astro-ph/0609481 [abs, ps, pdf, other] :: Title: Explicit Cosmological Coarse Graining via Spatial Averaging
Authors: Aseem Paranjape, T. P. Singh
Comments: 14 pages, 1 figure; (v2) added references, (v3) material and references added
Note: replaced with revised version Fri, 16 Feb 2007 10:52:11 GMT (25kb)
astro-ph/0610590 [abs, ps, pdf, other] :: Title: A direct consequence of the expansion of space?
Authors: Michal Chodorowski (Copernicus Center)
Comments: 12 pages, no figures; extended, more expository version, apparent inconsistencies eliminated
Note: replaced with revised version Fri, 16 Feb 2007 15:29:19 GMT (13kb)
astro-ph/0610728 [abs, ps, pdf, other] :: Title: The Potential-Density Phase Shift Method for Determining the Corotation Radii in Spiral and Barred Galaxies
Authors: Xiaolei Zhang, Ronald J. Buta
Comments: 48 pages, 16 figures. Accepted for publication in the Astronomical Journal
Note: replaced with revised version Fri, 16 Feb 2007 03:17:41 GMT (605kb)
astro-ph/0610806 [abs, ps, pdf, other] :: Title: Consequences of dark matter-dark energy interaction on cosmological parameters derived from SNIa data
Authors: L. Amendola, G. C. Campos, R. Rosenfeld
Comments: 16 pages, 6 figures. Incorporates analysis using the CMB shift parameter
Note: replaced with revised version Fri, 16 Feb 2007 10:11:18 GMT (964kb)
astro-ph/0611204 [abs, ps, pdf, other] :: Title: Tidal tails around globular clusters. Are they a good tracer of cluster orbits?
Authors: M. Montuori (CNR, Roma, Italy), R. Capuzzo-Dolcetta (Dep. of Physics, Univ. La Sapienza, Roma, Italy), P. Di Matteo (Obs. de Paris, Paris, France), A.Lepinette (CSIC/INTA, Torrejon de Ardoz, Spain), P.Miocchi (INAF, Osservatorio di Teramo, Teramo, Italy)
Comments: Latex file in the AASTEX standard; 15 pages, 8 figures, 3 tables. Paper accepted on dec. 31 2006 for publication on ApJ, main journal
Note: replaced with revised version Fri, 16 Feb 2007 08:16:43 GMT (440kb)
astro-ph/0612021 [abs, ps, pdf, other] :: Title: Rapid N_H changes in NGC 4151
Authors: S. Puccetti (1,2), F. Fiore (1), G. Risaliti (3,4), M. Capalbi (2), M. Elvis (4), F. Nicastro (1,4,5). ((1)INAF/OA Roma, (2)ASI Science Data Center, (3)INAF/OA Firenze, (4) Harvard/CfA, (5) UNAM)
Comments: Added references, corrected typos. 21 pages, 9 figures; accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal
Note: replaced with revised version Fri, 16 Feb 2007 10:54:01 GMT (239kb)
astro-ph/0612129 [abs, ps, pdf, other] :: Title: Millisecond Dips in Sco X-1 are Likely the Result of High-Energy Particle Events
Authors: T. A. Jones, A. M. Levine, E. H. Morgan, S. Rappaport
Comments: Preliminary report, 5 pages, 1 figure; Version 2 has corrected identification of non-X-ray events in figure and text
Note: replaced with revised version Fri, 16 Feb 2007 19:23:27 GMT (16kb)
astro-ph/0701657 [abs, ps, pdf, other] :: Title: The sizes of BLRs and BH masses of double-peaked broad low-ionization emission line objects
Authors: Xue-Guang Zhang, Dultzin-Hacyan Deborah, Ting-Gui Wang
Comments: 7 pages, two figures and one table. Accepted by MNRAS
Note: replaced with revised version Fri, 16 Feb 2007 16:45:47 GMT (22kb)
astro-ph/0701896 [abs, ps, pdf, other] :: Title: Relation between photospheric magnetic field and chromospheric emission
Authors: R. Rezaei, R. Schlichenmaier, C.A.R. Beck, J.H.M.J. Bruls, W. Schmidt
Comments: 15 pages, accepted in Astron. Astrophys., 2007
Note: replaced with revised version Fri, 16 Feb 2007 13:10:24 GMT (352kb)
astro-ph/0702058 [abs, ps, pdf, other] :: Title: High Performance Direct Gravitational N-body Simulations on Graphics Processing Unit
Authors: Simon Portegies Zwart, Robert Belleman, Peter Geldof
Comments: Submitted to New Astronomy (minor revisions to section 4)
Note: replaced with revised version Fri, 16 Feb 2007 09:24:22 GMT (50kb)
astro-ph/0702119 [abs, ps, pdf, other] :: Title: New 13CO observations towards the Keplerian gaseous disk around R Mon
Authors: T. Alonso-Albi, A. Fuente, R. Bachiller, A. Natta, L. Testi, R. Neri, P. Planesas
Comments: 4 pages, 5 figure. Proceedings of the conference "Science with ALMA: a new era for Astrophysics" hold in Madrid in November, 13-17, 2006
Note: replaced with revised version Fri, 16 Feb 2007 09:29:20 GMT (843kb)
astro-ph/0702246 [abs, ps, pdf, other] :: Title: Similar phenomena at different scales: Black Holes, the Sun, Gamma-ray Bursts, Supernovae, Galaxies and Galaxy Clusters
Authors: Shuang Nan Zhang
Comments: 22 pages, 13 figures, invited discourse for the 26th IAU GA, Prague, Czech Republic, Aug. 2006, to be published in Vol. 14 IAU Highlights of Astronomy, Ed. K.A. van der Hucht. Revised slightly to match the final submitted version, after incorporating comments and suggestions from several colleagues. A full-resolution version is available on request from the author at zhangsn@tsinghua.edu.cn
Note: replaced with revised version Fri, 16 Feb 2007 14:11:37 GMT (560kb)
astro-ph/0702355 [abs, ps, pdf, other] :: Title: How many supernovae are we missing at high redshift?
Authors: F. Mannucci, M. Della Valle, N. Panagia
Comments: 9 pages, MNRAS, in press, a few typos corrected
Note: replaced with revised version Fri, 16 Feb 2007 16:36:01 GMT (40kb)
astro-ph/0702421 [abs, ps, pdf, other] :: Title: Abundance analysis of barium and mild barium stars
Authors: R. Smiljanic, G. F. Porto de Mello, L. da Silva
Comments: 34 pages, 18 figures, A&A accepted (referee version was uploaded by mistake, normal version is now available)
Note: replaced with revised version Fri, 16 Feb 2007 09:05:40 GMT (132kb)

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Cross-listings

gr-qc/0702085 [abs, ps, pdf, other] :: Title: An Awesome Hypothesis for Dark Energy : The Abnormally Weighting Energy
Authors: A. Fuzfa, J.-M. Alimi
Comments: 3 pages, 1 figure, prepared for the Proceedings of the 11th Marcel Grossmann Conference, held in Berlin, Germany, July 2006

We introduce the Abnormally Weighting Energy (AWE) hypothesis in which dark energy (DE) is presented as a consequence of the violation of the weak equivalence principle (WEP) at cosmological scales by some dark sector. Indeed, this implies a violation of the strong equivalence principle (SEP) for ordinary matter and consequent cosmic acceleration in the observable frame as well as variation of the gravitational constant. The consequent DE mechanism build upon the AWE hypothesis (i) does not require a violation of the strong energy condition $p<-\rho c^2/3$, (ii) assumes rather non-negligible direct couplings to the gravitational scalar field (iii) offers a natural convergence mechanism toward general relativity (iv) accounts fairly for supernovae data from various couplings and equations of state of the dark sector as well as density parameters very close to the ones of the concordance model $\Lambda CDM$. Finally (v), this AWE mechanism typically ends up with an Einstein-de Sitter expansion regime once the attractor is reached.
gr-qc/0702095 [abs, ps, pdf, other] :: Title: Singularity: Raychaudhuri Equation once again
Authors: Naresh Dadhich
Comments: 11 pages, Contribution to Special issue of Pramana on Raychaudhuri Equation at Cross-roads, edited by Naresh Dadhich, Pankaj Joshi and Probir Roy

I first recount Raychaudhuri's deep involvement with the singularity problem in general relativity. I then argue that precisely the same situation has arisen today in loop quantum cosmology as obtained when Raychaudhuri discovered his celebrated equation. We thus need a new analogue of the Raychaudhuri equation in quantum gravity.
gr-qc/0702098 [abs, ps, pdf, other] :: Title: Stable Isotropic Cosmological Singularities in Quadratic Gravity
Authors: John D. Barrow, Jonathan Middleton
Comments: 18 pages, no figures

We show that, in quadratic lagrangian theories of gravity, isotropic cosmological singularities are stable to the presence of small scalar, vector and tensor inhomogeneities. Unlike in general relativity, a particular exact isotropic solution is shown to be the stable attractor on approach to the initial cosmological singularity. This solution is also known to act as an attractor in Bianchi universes of types I, II and IX, and the results of this paper reinforce the hypothesis that small inhomogeneous and anisotropic perturbations of this attractor form part of the general cosmological solution to the field equations of quadratic gravity. Implications for the existence of a 'gravitational entropy' are also discussed.
hep-ph/0702168 [abs, ps, pdf, other] :: Title: A Model with a Cosmographic Landscape
Authors: Fritz W. Bopp (University of Siegen)
Comments: 9 pages 7, figures

To argue against a too narrow focus in the LHC Higgs search, a simpleminded model with a rich "cosmographic" vacuum structure for the generation of masses is developed on a conceptual level. In this framework Higgs like bosons which could exist in the LHC mass range have no preference to decay in heavy flavors.
nlin.CD/0305017 [abs, ps, pdf, other] :: Title: Clustering of inertial particles in a turbulent flow
Authors: Tov Elperin, Nathan Kleeorin, Michael A. Liberman, Victor S. L'vov, Anna Pomyalov, Igor Rogachevskii
Comments: 13 pages, 1 Fig., Phys. Rev. E., submitted. Presentation is improved
Subj-class: Chaotic Dynamics; Pattern Formation and Solitons

We analyzed formation of small-scale inhomogeneities of particle spatial distribution (particle clustering) in a turbulent flow. The particle clustering is a consequence of a spontaneous breakdown of their homogeneous space distribution, and is caused by a combined effect of the particle inertia and a finite correlation time of the turbulent velocity field. Theory of the particle clustering is extended to the case when the particle Stokes time is larger than the Kolmogorov time scale, but is much smaller than the correlation time at the integral scale of turbulence. The criterion of the clustering instability is obtained. Applications of the analyzed effects to the dynamics of inertial particles in industrial turbulent flows are discussed.
nucl-ex/0702034 [abs, ps, pdf, other] :: Title: Indirect study of 19Ne states near the 18F+p threshold
Authors: N. de Sereville, A. Coc, C. Angulo, M. Assuncao, D. Beaumel, E. berthoumieux, B. Bouzid, S. Cherubini, M. Couder, P. Demaret, F de Oliveira Santos, P. Figuera, S. Fortier, M. Gaelens, F. Hammache, J. Kiener, A. Lefebvre-Schuhl, D. Labar, P. Leleux, M. Loiselet, A. Ninane, S. Ouichaoui, G. Ryckewaert, N. Smirnova, V. Tatischeff
Comments: 18 pages, 8 figures. Accepted in Nuclear Physics A

The early E < 511 keV gamma-ray emission from novae depends critically on the 18F(p,a)15O reaction. Unfortunately the reaction rate of the 18F(p,a)15O reaction is still largely uncertain due to the unknown strengths of low-lying proton resonances near the 18F+p threshold which play an important role in the nova temperature regime. We report here our last results concerning the study of the d(18F,p)19F(alpha)15N transfer reaction. We show in particular that these two low-lying resonances cannot be neglected. These results are then used to perform a careful study of the remaining uncertainties associated to the 18F(p,a)15O and 18F(p,g)19Ne reaction rates.

Replacements

astro-ph/0509897 [abs, ps, pdf, other] :: Title: Detailed theoretical predictions of the outskirts of dark matter halos
Authors: Juan E. Betancort-Rijo (1), Miguel A. Sanchez-Conde (2), Francisco Prada (2), Santiago G. Patiri (1) ((1) Instituto de Astrofisica de Canarias, (2) Instituto de Astrofisica de Andalucia (CSIC))
Comments: 12 pages, 8 figures, 1 table, replaced to match the published version
Journal-ref: The Astrophysical Journal, 649, 579 (2006)
Note: replaced with revised version Mon, 19 Feb 2007 10:54:13 GMT (50kb)
astro-ph/0511646 [abs, ps, pdf, other] :: Title: Cosmological evolution of cosmic string loops
Authors: Christophe Ringeval, Mairi Sakellariadou, Francois Bouchet
Comments: 12 pages, 4 figures, uses iopart. Improved statistics, numerical robustness discussed in details, references added, note added. Matches published version
Journal-ref: JCAP 0702 (2007) 023
Note: replaced with revised version Mon, 19 Feb 2007 11:16:39 GMT (393kb)
astro-ph/0603812 [abs, ps, pdf, other] :: Title: Dynamical Influences of the Last Magellanic Interaction On the Magellanic Clouds
Authors: Kenji Bekki, Masashi Chiba
Comments: 11 pages, 7 figures, accepted by PASA
Note: replaced with revised version Mon, 19 Feb 2007 06:46:49 GMT (276kb)
astro-ph/0605739 [abs, ps, pdf, other] :: Title: Constraining Torus Models for AGNs Using X-Ray Observations
Authors: E. Ibar, P. Lira
Comments: 10 pages, 4 figures, submitted to A&A
Note: replaced with revised version Mon, 19 Feb 2007 17:07:10 GMT (281kb)
astro-ph/0609175 [abs, ps, pdf, other] :: Title: Nearby early-type galaxies with ionized gas. III. Analysis of line-strength indices with new stellar population models
Authors: F. Annibali, A. Bressan, R. Rampazzo, W. W. Zeilinger, L. Danese
Comments: Final version as it will appear in A&A. Typos in the Abstract and Conclusions have been corrected
Note: replaced with revised version Mon, 19 Feb 2007 18:54:36 GMT (422kb)
astro-ph/0610829 [abs, ps, pdf, other] :: Title: Search for Gravitational Waves in the CMB After WMAP3: Foreground Confusion and The Optimal Frequency Coverage for Foreground Minimization
Authors: Alexandre Amblard, Asantha Cooray, Manoj Kaplinghat
Comments: 13 pages, 8 figures, replaced to match the accepted version in PRD
Note: replaced with revised version Fri, 16 Feb 2007 23:02:10 GMT (566kb)
astro-ph/0611070 [abs, ps, pdf, other] :: Title: High-resolution spectroscopy of RGB stars in the Sagittarius Streams. I. Radial velocities and chemical abundances
Authors: L. Monaco (ESO), M. Bellazzini (INAF - OA Bologna), P. Bonifacio (Observatoire de Paris; INAF - OA Trieste), A. Buzzoni (INAF - OA Bologna), F.R. Ferraro (Bologna Univ.), G.Marconi (ESO), L. Sbordone (INAF - OA Trieste; INAF - OA Roma), S. Zaggia (INAF - OA Padova)
Comments: 18 pages, 9 figures, 7 tables. Accepted for publication in A&A. Matching published version
Note: replaced with revised version Mon, 19 Feb 2007 05:35:13 GMT (884kb)
astro-ph/0611121 [abs, ps, pdf, other] :: Title: A contribution to the selection of emission-line galaxies using narrow-band filters in the optical airglow windows
Authors: Sergio Pascual, Jesus Gallego, Jaime Zamorano
Comments: Accepted for publication in PASP 48 pages, 10 figures Corrected typos, fixed references. Updated reference to TF
Note: replaced with revised version Mon, 19 Feb 2007 19:11:42 GMT (155kb)
astro-ph/0611765 [abs, ps, pdf, other] :: Title: Internal shocks in relativistic outflows: collisions of magnetized shells
Authors: Petar Mimica (1), Miguel-Angel Aloy (1, 2), Ewald Mueller (2) ((1) Departamento de Astronomia y Astrofisica, Universidad de Valencia, (2) MPA Garching)
Comments: 17 pages, 18 figures. 2 new references have been added. Accepted for publication in Astronomy and Astrophysics
Note: replaced with revised version Mon, 19 Feb 2007 15:22:17 GMT (875kb)
astro-ph/0612204 [abs, ps, pdf, other] :: Title: Electron Injection at High Mach Number Quasi-Perpendicular Shocks : Surfing and Drift Acceleration
Authors: T.Amano, M.Hoshino
Comments: 35 pages, 9 figures, accepted by ApJ
Note: replaced with revised version Mon, 19 Feb 2007 02:52:53 GMT (1044kb)
astro-ph/0612306 [abs, ps, pdf, other] :: Title: COSMOS : Hubble Space Telescope Observations
Authors: N. Scoville, A. Benson, A. W. Blain, D. Calzetti, A. Comastri, P. Capak, C. Carilli, J. E. Carlstrom, C. M. Carollo, J. Colbert, E. Daddi, R. S. Ellis, M. Elvis, S. P. Ewald, M. Fall, A. Franceschini, M. Giavalisco, W. Green, R. E. Griffiths, L. Guzzo, G. Hasinger, C. Impey, J-P. Kneib, J. Koda, A. Koekemoer, O. Lefevre, S. Lilly, C. T. Liu, H. J. McCracken, R. Massey, Y. Mellier, S. Miyazaki, B. Mobasher, J. Mould, C. Norman, A. Refregier, A. Renzini, J. Rhodes, M. Rich, D. B. Sanders, D. Schiminovich, E. Schinnerer, M. Scodeggio, K. Sheth, P. L. Shopbell, Y. Taniguchi, N. Tyson, C. M. Urry, L. Van Waerbeke, P. Vettolani, S. D. M. White, L. Yan, G Zamorani
Comments: 21 pages, 6 figures -- to appear in COSMOS ApJ Suppl. special issue
Note: replaced with revised version Mon, 19 Feb 2007 03:41:30 GMT (245kb)
astro-ph/0702350 [abs, ps, pdf, other] :: Title: Antimatter in the Milky Way
Authors: C. Bambi, A.D. Dolgov
Comments: 13 pages, no figures, references added
Note: replaced with revised version Mon, 19 Feb 2007 12:16:40 GMT (15kb)
gr-qc/0611101 [abs, ps, pdf, other] :: Title: Inaccessible Singularities in Toral Cosmology
Authors: Brett McInnes
Comments: 10 pages, version to appear in Classical and Quantum Gravity
Note: replaced with revised version Mon, 19 Feb 2007 02:56:17 GMT (22kb)
gr-qc/0702087 [abs, ps, pdf, other] :: Title: Renormalization-group running cosmologies and the generalized second law
Authors: R. Horvat
Comments: 8 pages, a few misprints in formulae corrected
Note: replaced with revised version Mon, 19 Feb 2007 16:07:24 GMT (7kb)

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Cross-listings

gr-qc/0702099 [abs, ps, pdf, other] :: Title: Gravitational Waves from Nonlinear Couplings of Radial and Polar Nonradial Modes in Relativistic Stars
Authors: Andrea Passamonti, Nikolaos Stergioulas, Alessandro Nagar
Comments: 12 pages, 7 figures, ReVTeX 4.0, submitted to Phys. Rev. D

The post-bounce oscillations of newly-born relativistic stars are expected to lead to gravitational-wave emission through the excitation of nonradial oscillation modes. At the same time, the star is oscillating in its radial modes, with a central density variation that can reach several percent. Nonlinear couplings between radial oscillations and polar nonradial modes lead to the appearance of combination frequencies (sums and differences of the linear mode frequencies). We study such combination frequencies using a gauge-invariant perturbative formalism, which includes bilinear coupling terms between different oscillation modes. For typical values of the energy stored in each mode we find that gravitational waves emitted at combination frequencies could become detectable in galactic core-collapse supernovae with advanced interferometric or wide-band resonant detectors.
gr-qc/0702104 [abs, ps, pdf, other] :: Title: Response to ``Comment on `Primordial magnetic seed field amplification by gravitational waves' "
Authors: G. Betschart, C. Zunkel, P.K.S. Dunsby, M. Marklund
Comments: 4 pages, 2 figures, to appear in Physical Review D

Here we respond to the comment by Tsagas (gr-qc/0503042) on our paper gr-qc/0503006. We show that the results in that comment are flawed and cannot be used for drawing conclusion about the nature of magnetic field amplification by gravitational waves, and give further support that the results of gr-qc/0503006 are correct.
hep-ph/0702176 [abs, ps, pdf, other] :: Title: U-boson production in e+e- annihilations, psi and Upsilon decays, and Light Dark Matter
Authors: Pierre Fayet
Comments: 18 pages, 8 figures

We recall how a new light gauge boson emerged in Supersymmetric extensions of the Standard Model with an extra singlet superfield, and how it could behave very much as a light pseudoscalar, with the corresponding symmetry broken at a scale higher than electroweak.
Such a new gauge boson U, light and very weakly coupled, allows for Light Dark Matter particles, which could be at the origin of the 511 keV line from the galactic bulge. Could it be found directly in e+e- annihilations ? Not so easily, due to various constraints on its couplings, especially axial ones, leading to an axionlike behavior or extra parity-violation effects. Searches for the decay Upsilon -> gamma + invisible U may be used to constrain severely its axial coupling to the electron, f_eA = f_bA, to be less than about 10^-6 m_U(MeV).
The vector coupling to the electron may in principle be larger. We find from g_mu-2, under reasonable assumptions, that this coupling can be at most as large as ~ 1.3 10^-3, for m_U < m_mu. Such a coupling of the order of 10^-3 could also be responsible for the somewhat large value of g_mu-2, compared to Standard Model expectations.
The U couplings to electrons are otherwise likely to be smaller, e.g. \lsim 3 10^-6 m_U(MeV), if the couplings to neutrinos and electrons are similar. This restricts significantly the possibility of detecting a light U boson in e+e- -> gamma U. Despite that, U exchanges can provide annihilation cross sections of LDM particles of the appropriate size, even if this may require that light dark matter be relatively strongly self-interacting.
hep-th/0602114 [abs, ps, pdf, other] :: Title: Thermodynamics of Exotic Black Holes, Negative Temperature, and Bekenstein-Hawking Entropy
Authors: Mu-In Park
Comments: Explicit discussuin of the remanining open questions added, enlarged references accordingly, accepted in Phys. Lett. B

Recently, exotic black holes whose masses and angular momenta are interchanged have been found, and it is known that their entropies depend only on the $inner$ horizon areas. But a basic problem of these entropies is that the second law of thermodynamics is not guaranteed, in contrast to the Bekenstein-Hawking entropy. Here, I find that there is another entropy formula which recovers the usual Bekenstein-Hawking form, but the characteristic angular velocity and temperature are identified with those of the inner horizon, in order to satisfy the first law of black hole thermodynamics. The temperature has a $negative$ value, due to an upper bound of mass as in spin systems, and the angular velocity has a $lower$ bound. I show that one can obtain the same entropy formula from a conformal field theory computation, based on classical Virasoro algebras. I also describe several unanswered problems and some proposals for how these might be addressed.
hep-th/0702087 [abs, ps, pdf, other] :: Title: Gravitational collapse of a macroscopic string by a Newtonian description including the effect of gravitational radiation
Authors: Roberto Iengo
Comments: 14 pages, 6 figures, typos corrected, some comments added

We make an attempt to dynamically study, in four space-time dimensions, the classical gravitational collapse of a macroscopic circular fundamental string, by a truncation of the Einstein equations that suppresses retarded features but keeps the main self-gravity peculiarities of the relativistic string dynamics, and allows the investigation of a possible infinite red-shift. The numerical solution of the string evolution in the self-induced metric shows an infinite red shift at a macroscopic size of the string, when the string reaches the velocity of light. We further include the back-reaction of the radiation of gravitons which induces energy dissipation: now the velocity of light is not reached, the infinite red-shift does not form and the string simply shrinks with damped oscillations.
hep-th/0702121 [abs, ps, pdf, other] :: Title: Dark energy, the cosmic coincidence, and entanglement
Authors: Hyeong-Chan Kim, Jae-Weon Lee, Jungjai Lee
Comments: 5 pages, 3 figures, revtex, typos corrected, references added

We show that an inflation with the number of e-folds $N\simeq 65$ solves the cosmic coincidence problem in a natural manner in the context of holographic dark energy. Assuming the inflation and a power-law acceleration phase we obtain an analytical formula for the size of an event horizon of the universe as a function of time. A simple numerical study exploiting the formula well reproduces the observed evolution of the universe from the inflation to the present without fine tuning or ad hoc assumptions. This nontrivial coincidence between the theory and the observational data enhances the validity of holographic dark energy models including the entanglement dark energy model recently proposed.

Replacements

astro-ph/0606579 [abs, ps, pdf, other] :: Title: Interloper treatment in dynamical modelling of galaxy clusters
Authors: Radoslaw Wojtak, Ewa L. Lokas, Gary A. Mamon, Stefan Gottloeber, Francisco Prada, Mariano Moles
Comments: 15 pages, 14 figures, final version accepted for publication in A&A
Note: replaced with revised version Tue, 20 Feb 2007 14:01:20 GMT (158kb)
astro-ph/0609507 [abs, ps, pdf, other] :: Title: Importance of Supernovae at z<0.1 for Probing Dark Energy
Authors: Eric V. Linder
Comments: 8 pages, 6 figures; added references, minor changes; corrected typo in eq. 8
Journal-ref: Phys.Rev. D74 (2006) 103518
Note: replaced with revised version Tue, 20 Feb 2007 16:54:45 GMT (30kb)
astro-ph/0610920 [abs, ps, pdf, other] :: Title: Gravitational wave stochastic background from cosmic (super)strings
Authors: Xavier Siemens, Vuk Mandic, Jolien Creighton
Comments: Replaced with version accepted for publication in Physical Review Letters. 4 pages, 2 figures
Note: replaced with revised version Tue, 20 Feb 2007 18:10:16 GMT (42kb)
astro-ph/0611237 [abs, ps, pdf, other] :: Title: The Low-Mass X-ray Binary and Globular Cluster Connection in Virgo Cluster Early-type Galaxies: Optical Properties
Authors: Gregory R. Sivakoff (1,2), Andrés Jordán (3), Craig L. Sarazin (1), John P. Blakeslee (4), Patrick C{\^ o}t{\' e} (5), Laura Ferrarese (5), Adrienne M. Juett (1), Simona Mei (6,7), Eric W. Peng (5) ((1) University of Virginia, (2) The Ohio State University, (3) European Southern Observatory, (4) Washington State University, (5) Herzberg Institute of Astrophysics, (6) Observatoire de Paris, (7) Johns Hopkins University)
Comments: Accepted by Astrophysical Journal after minor changes, (this version also fixes improper display of Figure 3), 19 pages, 5 Color Figures (degraded), 6 B & W Figures: Full resolution paper available at this http URL
Note: replaced with revised version Tue, 20 Feb 2007 16:35:15 GMT (372kb)
astro-ph/0612150 [abs, ps, pdf, other] :: Title: Present bounds on the relativistic energy density in the Universe from cosmological observables
Authors: Gianpiero Mangano, Alessandro Melchiorri, Olga Mena, Gennaro Miele, Anze Slosar
Note: replaced with revised version Tue, 20 Feb 2007 13:51:49 GMT (61kb)
astro-ph/0612384 [abs, ps, pdf, other] :: Title: Large Structures and Galaxy Evolution in COSMOS at z < 1.1
Authors: N. Scoville, H. Aussel, A. Benson, A. Blain, D. Calzetti, P. Capak, R. S. Ellis, A. El-Zant, A. Finoguenov, M. Giavalisco, L. Guzzo, G. Hasinger, J. Koda, O. Lefevre, R. Massey, H. J. McCracken, B. Mobasher, A. Renzini, J. Rhodes, M. Salvato, D. B. Sanders, S. S. Sasaki, E. Schinnerer, K. Sheth, P. L. Shopbell, Y. Taniguchi, J. E. Taylor, D. J. Thompson
Comments: 72 pages with 29 pages of figures, for cosmos apj suppl special issue
Note: replaced with revised version Tue, 20 Feb 2007 13:53:22 GMT (2032kb)
astro-ph/0701113 [abs, ps, pdf, other] :: Title: Information criteria for astrophysical model selection
Authors: Andrew R Liddle
Comments: 5 pages, no figures. Update to match version accepted by MNRAS Letters. Extra references, minor changes to discussion, no change to conclusions
Note: replaced with revised version Tue, 20 Feb 2007 06:32:19 GMT (13kb)
astro-ph/0701738 [abs, ps, pdf, other] :: Title: The White Dwarf Cooling Sequence of NGC6397
Authors: Brad M. S. Hansen, Jay Anderson, James Brewer, Aaron Dotter, Greg. G. Fahlman, Jarrod Hurley, Jason Kalirai, Ivan King, David Reitzel, Harvey B. Richer, R.Michael Rich, Michael M. Shara, Peter B. Stetson
Comments: 56 pages, 30 figures
Note: replaced with revised version Tue, 20 Feb 2007 19:52:09 GMT (1077kb)
astro-ph/0702459 [abs, ps, pdf, other] :: Title: A new Neptune-mass planet orbiting HD 219828
Authors: C. Melo, N. C. Santos, W. Gieren, G. Pietrzynski, M. T. Ruiz, S. G. Sousa, F. Bouchy, C. Lovis, M. Mayor, F. Pepe, D. Queloz, R. da Silva, S. Udry
Comments: Accepted for publication in A&A. In a few occasions in the text, HD219828 was mistyped as HD219218. This has been now corrected
Note: replaced with revised version Tue, 20 Feb 2007 12:40:50 GMT (57kb)
astro-ph/0702461 [abs, ps, pdf, other] :: Title: Variations of the ultraviolet resonance lines of the Be IV-V star zeta Cassiopeiae
Authors: Myron A. Smith, David A. Bohlender
Comments: 9 pages, 4 figures, accepted by Astronomy & Astrophysics; 2nd version includes new A&A aa.cls file
Note: replaced with revised version Tue, 20 Feb 2007 19:54:22 GMT (130kb)
hep-th/0702098 [abs, ps, pdf, other] :: Title: Casimir effect in rugby-ball type flux compactifications
Authors: Emilio Elizalde, Masato Minamitsuji, Wade Naylor
Comments: 13 pages, 6 figures, minor corrections
Note: replaced with revised version Tue, 20 Feb 2007 19:22:49 GMT (30kb)

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gr-qc/0702110 [abs, ps, pdf, other] :: Title: Holographic dark energy in Brans-Dicke theory
Authors: Narayan Banerjee, Diego Pavon
Comments: 12 pages, no figures, to be published in Physics Letters B

In this Letter it is shown that when the holographic dark energy is combined with the Brans-Dicke field equations the transition from decelerated to accelerated expansion of the Universe can be more easily accounted for than when resort to the Einstein field equations is made. Likewise, the coincidence problem of late cosmic acceleration gets more readily softened.
hep-ph/0702184 [abs, ps, pdf, other] :: Title: Gravitino Dark Matter in R-Parity Breaking Vacua
Authors: Wilfried Buchmuller, Laura Covi, Koichi Hamaguchi, Alejandro Ibarra, Tsutomu Yanagida
Comments: 18 pages

We show that in the case of small R-parity and lepton number breaking couplings, primordial nucleosynthesis, thermal leptogenesis and gravitino dark matter are naturally consistent for gravitino masses m_{3/2} \gsim 5 GeV. We present a model where R-parity breaking is tied to B-L breaking, which predicts the needed small couplings. The metastable next-to-lightest superparticle has a decay length that is typically larger than a few centimeters, with characteristic signatures at the LHC. The photon flux produced by relic gravitino decays may be part of the apparent excess in the extragalactic diffuse gamma-ray flux obtained from the EGRET data for a gravitino mass m_{3/2} \sim 10 GeV. In this case, a clear signal can be expected from GLAST in the near future.
hep-th/0702143 [abs, ps, pdf, other] :: Title: Trans-Planckian wimpzillas
Authors: E. W. Kolb, A. A. Starobinsky, I. I. Tkachev
Comments: 6 pages

Two previously proposed conjectures--gravitational trans-Planckian particle creation in the expanding universe, and the existence of ultra-heavy stable particles with masses up to the Planck scale (wimpzillas)--are combined in a proposal for trans-Planckian particle creation of wimpzillas. It is shown that the trans-Planckian particle creation parameter should be rather small to avoid overproduction of such particles. This ensures that wimpzillas are mainly created at the end of primordial inflation. Conditions under which trans-Planckian wimpzillas can constitute the present dark matter are determined.
hep-th/0702153 [abs, ps, pdf, other] :: Title: Generating Ekpyrotic Curvature Perturbations Before the Big Bang
Authors: Jean-Luc Lehners, Paul McFadden, Neil Turok, Paul J. Steinhardt
Comments: 21 pages, no figures

We analyze a general mechanism for producing a nearly scale-invariant spectrum of cosmological curvature perturbations during a contracting phase preceding a big bang, that can be entirely described using 4d effective field theory. The mechanism, based on first producing entropic perturbations and then converting them to curvature perturbations, can be naturally incorporated in cyclic and ekpyrotic models in which the big bang is modelled as a brane collision, as well as other types of cosmological models with a pre-big bang phase. We show that the correct perturbation amplitude can be obtained and that the scalar spectral tilt n tends to range from slightly blue to red, with 0.97 < n < 1.02 for the simplest models, a range compatible with current observations but shifted by a few per cent towards the blue compared to the prediction of the simplest, large-field inflationary models.
hep-th/0702159 [abs, ps, pdf, other] :: Title: Deformed Special Relativity in a Canonical Framework
Authors: Subir Ghosh (Indian Statistical Institute, India), Probir Pal (Uluberia College, India)
Comments: 17 pages, LaTex

In this paper we have studied the nature of kinematical and dynamical laws in $\kappa $-Minkowski spacetime from a new perspective: the canonical phase space approach. We have introduced a new form of $\kappa$-Minkowski phase space algebra from which we recover the $\kappa$-extended finite Lorentz transformations derived in \cite{kim}. This is a particular form of a Deformed Special Relativity model that admits a modified energy-momentum dispersion law as well as noncommutative $\kappa$-Minkowski phase space. We show that this system can be completely mapped to a set of phase space variables that obey canonical (and {\it{not}} $\kappa$-Minkowski) phase space algebra and Special Relativity Lorentz transformation (and {\it{not}} $\kappa$-extended Lorentz transformation). We demonstrate the usefulness and simplicity of this approach through a number of applications both in classical and quantum mechanics. We also construct a Lagrangian for the $\kappa$-particle.
hep-th/0702165 [abs, ps, pdf, other] :: Title: A smooth bouncing cosmology with scale invariant spectrum
Authors: Paolo Creminelli (ICTP, Trieste), Leonardo Senatore (Harvard U.)
Comments: 20 pages, 1 fig

We present a bouncing cosmology which evolves from the contracting to the expanding phase in a smooth way, without developing instabilities or pathologies and remaining in the regime of validity of 4d effective field theory. A nearly scale invariant spectrum of perturbations is generated during the contracting phase by an isocurvature scalar with a negative exponential potential and then converted to adiabatic. The model predicts a slightly blue spectrum, n_S >~ 1, no observable gravitational waves and a high (but model dependent) level of non-Gaussianities with local shape. The model represents an explicit and predictive alternative to inflation, although, at present, it is clearly less compelling.
hep-th/0702166 [abs, ps, pdf, other] :: Title: Dilaton cosmology and phenomenology
Authors: M. Gasperini
Comments: 60 pages, 10 figures, to appear in "String theory and fundamental interactions: celebrating Gabriele Veneziano on his 65th birthday" (Lecture Notes in Physics, Springer-Verlag, Berlin/Heidelberg, 2007)

This paper is dedicated to Gabriele Veneziano on his 65th birthday. Most of the results reported here are known results, due to Gabriele, or obtained in collaboration with him, or inspired by our joint work on string cosmology. A few new results are also presented concerning the duality invariance of a non-local dilaton coupling to the matter sources, and its possible cosmological applications in the context of the dark-energy scenario.

Replacements

astro-ph/0603251 [abs, ps, pdf, other] :: Title: Steps for Solving the Transfer Equation for Arbitrary Flows in Stationary Spacetimes
Authors: B. Chen, R. Kantowski, E. Baron, S. Knop, P. H. Hauschildt
Comments: 9 pages, 2 figures, MNRAS, in press. Numerous changes made in response to referees comments
Note: replaced with revised version Wed, 21 Feb 2007 16:15:27 GMT (48kb)
astro-ph/0610356 [abs, ps, pdf, other] :: Title: Physical Properties of Wolf-Rayet Stars
Authors: Paul A Crowther
Comments: 76 pages, 8 figures. Minor revision to "Annual Review of Astronomy & Astrophysics" review article Volume 45 (2007) following editors comments. Version with full resolution figures is available from this ftp URL
Note: replaced with revised version Wed, 21 Feb 2007 12:48:47 GMT (419kb)
astro-ph/0612711 [abs, ps, pdf, other] :: Title: SN 2006jc: A Wolf-Rayet Star Exploding in a Dense He-Rich Circumstellar Medium
Authors: Ryan J. Foley, Nathan Smith, Mohan Ganeshalingam, Weidong Li, Ryan Chornock, Alexei V. Filippenko
Comments: 4 pages, 3 figures. Accepted by ApJL 2007 Jan 25
Note: replaced with revised version Wed, 21 Feb 2007 15:12:22 GMT (137kb)
astro-ph/0701357 [abs, ps, pdf, other] :: Title: Imprints of a Primordial Preferred Direction on the Microwave Background
Authors: Lotty Ackerman, Sean M. Carroll, Mark B. Wise
Comments: 7 pages, no figures; v3: references added, accepted for publication in Phys. Rev. D
Note: replaced with revised version Wed, 21 Feb 2007 20:21:56 GMT (15kb)
astro-ph/0701518 [abs, ps, pdf, other] :: Title: Tip of the Red Giant Branch Distances. II. Zero-Point Calibration
Authors: Luca Rizzi, R. Brent Tully, Dmitry Makarov, Lidia Makarova, Andrew E. Dolphin, Shoko Sakai, Edward J. Shaya
Comments: accepted for publication into ApJ
Note: replaced with revised version Wed, 21 Feb 2007 00:16:09 GMT (290kb)
astro-ph/0702267 [abs, ps, pdf, other] :: Title: Conference summary: Mass loss from stellar clusters
Authors: M. Gieles (Utrecht University/ESO Santiago)
Comments: 6 pages, To appear in "Mass loss from stars and the evolution of stellar clusters". Proc. of a workshop held in honour of H.J.G.L.M. Lamers, Lunteren, The Netherlands. Eds. A. de Koter, L. Smith and R. Waters (San Francisco: ASP)
Note: replaced with revised version Wed, 21 Feb 2007 18:34:51 GMT (24kb)
astro-ph/0702461 [abs, ps, pdf, other] :: Title: Variations of the ultraviolet resonance lines of the Be IV-V star zeta Cassiopeiae
Authors: Myron A. Smith, David A. Bohlender
Comments: 9 pages, 4 figures, accepted by Astronomy & Astrophysics; new version includes old A&A aa.cls file
Note: replaced with revised version Wed, 21 Feb 2007 14:00:55 GMT (142kb)
hep-th/0605263 [abs, ps, pdf, other] :: Title: Holographic probabilities in eternal inflation
Authors: Raphael Bousso
Comments: 5 pages, 3 figures. v4: published version, misprints corrected (mu -> eta)
Journal-ref: Phys.Rev.Lett. 97 (2006) 191302
Note: replaced with revised version Wed, 21 Feb 2007 20:21:48 GMT (17kb)

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hep-ph/0702183 [abs, ps, pdf, other] :: Title: Constraints on the size of the extra dimension from KK gravitinos decay
Authors: David Gherson (IPNL)
Comments: 21 pages, 21 figures

We study the consequences of the gravitino decay into dark matter. We suppose that the lightest neutralino is the main component of dark matter. In our framework gravitino is heavy enough to decay before Big Bang Nucleosynthesis starts. We consider a model coming from a five dimensional supergravity compactified on $S^1/Z_2$ with gravity in the bulk and matter localized on tensionless branes at the orbifold fixed points. We require that the dark matter, which is produced thermally and in the decay of Kaluza-Klein modes of gravitino, has an abundance compatible with observation. We deduce from our model that there are curves of constraints between the size of the extra-dimension and the reheating temperature of the universe after inflation.
hep-th/0702129 [abs, ps, pdf, other] :: Title: Electromagnetic Properties of Kerr-Anti-de Sitter Black Holes
Authors: A. N. Aliev
Comments: 31 pages, REVTeX

We examine the electromagnetic properties of Kerr-AdS black holes in four and higher spacetime dimensions. Assuming that the black holes may carry a test electric charge we show that the Killing one-form which represents the difference between the timelike generators in the spacetime and in the reference background can be used as a potential one-form for the associated electromagnetic field. In four dimensions the potential one-form and the Kerr-AdS metric with properly re-scaled mass parameter solve the Einstein-Maxwell equations, thereby resulting in the familiar Kerr-Newman-AdS solution. We solve the quartic equation governing the location of the event horizons of the Kerr-Newman-AdS black holes and present closed analytic expressions for the radii of the horizons. We also compute the gyromagnetic ratio for these black holes and show that it corresponds to g=2 just as for ordinary black holes in asymptotically flat spacetime. Next, we compute the gyromagnetic ratio for the Kerr-AdS black holes with a single angular momentum and with a test electric charge in all higher dimensions. The gyromagnetic ratio crucially depends on the dimensionless ratio of the rotation parameter to the curvature radius of the AdS background. At the critical limit, when the boundary Einstein universe is rotating at the speed of light, it tends to g=2 irrespective of the spacetime dimension. Finally, we consider the case of a five dimensional Kerr-AdS black hole with two angular momenta and show that it possesses two distinct gyromagnetic ratios in accordance with its two orthogonal 2-planes of rotation. In the special case of two equal angular momenta, the two gyromagnetic ratios merge into one leading to g=4 at the maximum angular velocities of rotation.
hep-th/0702169 [abs, ps, pdf, other] :: Title: Non-linear interactions in a cosmological background in the DGP braneworld
Authors: Kazuya Koyama, Fabio P Silva
Comments: 11 pages

We study quasi-static perturbations in a cosmological background in the Dvali-Gabadadze-Porrati (DGP) braneworld model. We identify the Vainshtein radius at which the non-linear interactions of the brane bending mode become important in a cosmological background. The Vainshtein radius in the early universe is much smaller than the one in the Minkowski background, but in a self-accelerating universe it is the same as the Minkowski background. Our result shows that the perturbative approach is applicable beyond the Vainshtein radius for weak gravity by taking into account the second order effects of the brane bending mode. The linearised cosmological perturbations are shown to be smoothly matched to the solutions inside the Vainshtein radius. We emphasize the importance of imposing a regularity condition in the bulk by solving the 5D perturbations and we highlight the problem of ad hoc assumptions on the bulk gravity that lead to different conclusions.

Replacements

astro-ph/0507696 [abs, ps, pdf, other] :: Title: On the theory of MHD waves in a shear flow of a magnetized turbulent plasma
Authors: T.M. Mishonov, Y.G. Maneva, T.S. Hristov
Comments: 18 pages, no figures, PACS: 52.35.Bj, 95.30.Qd, 98.62.Mw, 97.10.Gz, 47.20.Ft; minor corrections
Note: replaced with revised version Thu, 22 Feb 2007 19:41:39 GMT (33kb)
astro-ph/0606618 [abs, ps, pdf, other] :: Title: The importance of interloper removal in galaxy clusters: saving more objects for the Jeans analysis
Authors: Radoslaw Wojtak, Ewa L. Lokas
Comments: 13 pages, 7 figures, more clusters analyzed in detail, mass-concentration relation for 22 clusters presented, accepted for publication in MNRAS
Note: replaced with revised version Thu, 22 Feb 2007 08:03:38 GMT (334kb)
astro-ph/0607464 [abs, ps, pdf, other] :: Title: Evolution of linear perturbations through a bouncing world model: Is the near Harrison-Zel'dovich spectrum possible via a bounce?
Authors: Han Seek Kim, Jai-chan Hwang
Comments: 37pages, 23 figures, revised substantially, published version in Physical Review D
Journal-ref: Phys.Rev. D75 (2007) 043501
Note: replaced with revised version Thu, 22 Feb 2007 05:26:21 GMT (524kb)
astro-ph/0608283 [abs, ps, pdf, other] :: Title: Early reionization by decaying particles in the light of three year WMAP data
Authors: Shinta Kasuya, Masahiro Kawasaki
Comments: 9 pages, 11 figures
Journal-ref: JCAP 0702 (2007) 010
Note: replaced with revised version Thu, 22 Feb 2007 02:24:58 GMT (428kb)
astro-ph/0610520 [abs, ps, pdf, other] :: Title: Void Ellipticity Distribution as a Probe of Cosmology
Authors: Daeseong Park, Jounghun Lee (Seoul Nat'l Univ.)
Comments: final version, published in PRL, all typos corrected in Fig.1 and the reference
Journal-ref: Phys.Rev.Lett. 98 (2007) 081301
Note: replaced with revised version Thu, 22 Feb 2007 10:31:39 GMT (287kb)
astro-ph/0611898 [abs, ps, pdf, other] :: Title: Cosmological Parameters from the SDSS DR5 Velocity Dispersion Function of Early-Type Galaxies through Radio-Selected Lens Statistics
Authors: Kyu-Hyun Chae
Comments: ApJL, accepted (results and presentations revised; conclusions unchanged)
Note: replaced with revised version Thu, 22 Feb 2007 08:49:29 GMT (27kb)
astro-ph/0702365 [abs, ps, pdf, other] :: Title: Polarized radio emission from a magnetar
Authors: M.Kramer (1), B.W.Stappers (2), A.Jessner (3), A.G.Lyne (1), C.A.Jordan (1) ((1) University of Manchester, Jodrell Bank Observatory, UK, (2) Stichting ASTRON, The Netherlands, (3) MPI fuer Radioastronomie, Germany)
Comments: accepted for publication in MNRAS, 15 pages, 11 figures. Figure 9 in reduced quality, full resolution preprint at this ftp URL, typos fixed
Note: replaced with revised version Wed, 21 Feb 2007 23:58:35 GMT (1202kb)
astro-ph/0702472 [abs, ps, pdf, other] :: Title: Diversity of the Supernova - Gamma-Ray Burst Connection
Authors: K. Nomoto, N. Tominaga, M. Tanaka, K. Maeda, T. Suzuki, J.S. Deng, P.A. Mazzali
Comments: 16 pages, 12 figures. To be published in the proceedings of the conference "SWIFT and GRBs: Unveiling the Relativistic Universe", Venice, June 5-9, 2006. To appear in "Il Nuovo Cimento"
Note: replaced with revised version Thu, 22 Feb 2007 18:56:20 GMT (1007kb)
astro-ph/0702487 [abs, ps, pdf, other] :: Title: Spin Exchange Rates in Proton-Hydrogen Collisions
Authors: Steven Furlanetto (Yale), Michael Furlanetto (LANL)
Comments: submitted to MNRAS, 5 pages, 2 figures, typos corrected
Note: replaced with revised version Thu, 22 Feb 2007 02:04:14 GMT (38kb)
astro-ph/0702505 [abs, ps, pdf, other] :: Title: Mode selection mechanism and magnetic diffusivity in a non-axisymmetric solar dynamo model
Authors: Jie Jiang, Jingxiu Wang
Comments: 14 pages, 3 figures, 3 tables; Accepted by AdSR
Note: replaced with revised version Thu, 22 Feb 2007 00:34:14 GMT (215kb)
astro-ph/0702556 [abs, ps, pdf, other] :: Title: Resolving the unresolved cosmic X-ray background in the Chandra Deep Fields
Authors: Ryan C. Hickox, Maxim Markevitch (Harvard-Smithsonian Center for Astrophysics)
Comments: 5 emulateapj pages, 4 figures, 1 table, submitted to ApJL (v2: updated typo in Fig. 3)
Note: replaced with revised version Thu, 22 Feb 2007 16:17:16 GMT (202kb)
gr-qc/0609097 [abs, ps, pdf, other] :: Title: A comment on the paper "On the orbit of the LARES satellite", by I. Ciufolini
Authors: Lorenzo Iorio
Comments: LaTex, 7 pages, no figures, 1 table. It refers to gr-qc/0609081 by I. Ciufolini. Quotation from such paper added: in it Ciufolini explicitly claims that his nearly polar LARES would be sufficient, without using LAGEOS and LAGEOS II. Typos corrected. Reference added. Style improved. Clarifications added
Subj-class: General Relativity and Quantum Cosmology; Geophysics; Space Physics
Note: replaced with revised version Thu, 22 Feb 2007 00:35:00 GMT (6kb)
gr-qc/0701164 [abs, ps, pdf, other] :: Title: Large Merger Recoils and Spin Flips From Generic Black-Hole Binaries
Authors: Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower, David Merritt
Comments: 4 pages. Included additional simulation to maximize kick effect
Note: replaced with revised version Thu, 22 Feb 2007 16:35:11 GMT (35kb)
hep-th/0603254 [abs, ps, pdf, other] :: Title: Black holes and dark energy from gravitational collapse on the brane
Authors: László Á. Gergely
Comments: v2: discussion on black hole formation added, many new references, 15 pages, 2 figures v3: more discussion on the transition into dark energy and on the tension, new references, 19 pages, version to appear in JCAP
Note: replaced with revised version Thu, 22 Feb 2007 15:36:13 GMT (56kb)
hep-th/0612217 [abs, ps, pdf, other] :: Title: 1/R multidimensional gravity with form-fields: stabilization of extra dimensions, cosmic acceleration and domain walls
Authors: Tamerlan Saidov, Alexander Zhuk
Comments: 10 pages, revtex, 5 eps figures, footnotes and references added
Note: replaced with revised version Thu, 22 Feb 2007 13:59:25 GMT (435kb)
hep-th/0702031 [abs, ps, pdf, other] :: Title: Multiple Lambda cosmology: dark fluid with time-dependent equation of state as classical analog of cosmological landscape
Authors: Shin'ichi Nojiri, Sergei D. Odintsov
Comments: LaTeX file, 8 pages, no figure, version to appear in PLB
Note: replaced with revised version Thu, 22 Feb 2007 11:38:58 GMT (9kb)

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