Cross-listings

gr-qc/0512154 [abs, ps, pdf, other] :: Title: Lower Neutrino Mass Bound from SN1987A Data and Quantum Geometry
Authors: G. Lambiase, G. Papini, R. Punzi, G. Scarpetta
Comments: 22 pages, 3 figures

A lower bound on the light neutrino mass $m_\nu$ is derived in the framework of a geometrical interpretation of quantum mechanics. Using this model and the time of flight delay data for neutrinos coming from SN1987A, we find that the neutrino masses are bounded from below by $m_\nu\gtrsim 10^{-4}-10^{-3}$eV, in agreement with the upper bound $m_\nu\lesssim$ $({\cal O}(0.1) - {\cal O} (1))$ eV currently available. When the model is applied to photons with effective mass, we obtain a lower limit on the electron density in intergalactic space that is compatible with recent baryon density measurements.
gr-qc/0512157 [abs, ps, pdf, other] :: Title: Light propagation and gravitational lensing on the Weyl-like spacetime in scalar-tensor theories of gravity
Authors: S.Tsuneishi, K.Watanabe, T.Tsuchida
Comments: 38 pages, 23 figures and 1 table, submitted to Prog. Theor. Phys

We study light propagation and gravitational lensing in scalar-tensor theories of gravity by using a static, axisymmetric exterior solution. The solution has asymptotic flatness properties and is reduced to Voorhees's one in the case of a constant scalar field. Our studies are done by using a technique of the conformal transformation such that their results are independent of details of scalar-tensor theories. For some specific cases, we analytically obtain a deflection angle of the light path and find that it can become negative. The appearance of a negative deflection angle indicates ``reflection'' of a light path, and we investigate under which conditions the light reflection occurs. As for the optical scalars, the Weyl source-term shows significantly different properties compared with that in the Schwarzschild spacetime. We therefore classify a space of the model parameters into four distinct regions on the basis of the qualitative properties of the Weyl source-term and find a close relationship between this classification and the occurrence of the light reflection. We finally solve the null geodesic equations and the optical scalar equations numerically. We find that a picture of the thin lens is applicable and give a simple analytic model for the optical scalars. As for the properties of gravitational lensing, the deflection angle and the image distortion rate are obtained as functions of the impact parameter. Again, we find a close relationship between their qualitative properties and the classification above.
hep-ph/0512350 [abs, ps, pdf, other] :: Title: Baryogenesis via Leptogenesis in presence of cosmic strings
Authors: Narendra Sahu, Pijushpani Bhattacharjee, Urjit A Yajnik
Comments: 17 pages, 5 figures

We study the effect on leptogenesis due to $B-L$ cosmic strings of a $U(1)_{B-L}$ extension of the Standard Model. The disappearance of closed loops of $B-L$ cosmic strings can produce right handed neutrinos, $N_R$'s, whose CP-asymmetric decay in out-of-thermal equilibrium condition can give rise to a net lepton ($L$) asymmetry. This is studied by using the relevant Boltzmann equations and including the effects of both thermal and string generated $N_R$'s. We explore the parameter region spanned by the relevant light- and heavy neutrino mass parameters $\tilde{m}_1$ and $M_1$, and constrain the scale of $B-L$ symmetry breaking, $\eta_{B-L}$, as well as the Majorana Yukawa coupling $h_1$ of the lightest right handed neutrino. For the values $\eta_{B-L}>10^{11}$GeV, where they can be effective, cosmic strings make a more dominant contribution than thermal leptogenesis. This provides an upper bound on the CP violating phase giving rise to the $L$-asymmetry.
nucl-th/0512093 [abs, ps, pdf, other] :: Title: Isovector Channel Role of Relativistic Mean Field Models in the Neutrino Mean Free Path
Authors: A. Sulaksono, P.T.P. Hutauruk, T. Mart
Comments: 20 pages, 8 figures
Journal-ref: Physical Review C 72, 065801 (2005)

An improvement in the treatment of the isovector channel of relativistic mean field (RMF) models based on effective field theory (E-RMF) is suggested, by adding an isovector scalar (delta) meson and using a similar procedure to the one used by Horowitz and Piekarewicz to adjust the isovector-vector channel in order to achieve a softer density dependent symmetry energy of the nuclear matter at high density. Their effects on the equation of state (EOS) at high density and on the neutrino mean free path (NMFP) in neutron stars are discussed.
nucl-th/0512095 [abs, ps, pdf, other] :: Title: Relativistic Mean Field Models at High Densities
Authors: A. Sulaksono, P.T.P. Hutauruk, C.K. Williams, T. Mart
Comments: 4 pages, 2 figures, talk given at the Third Asia-Pacific Conference on Few-Body Problems in Physics, Nakhon Ratchasima, Thailand, 26-30 July, 2005

The effects of vector-isovector terms predicted by relativistic mean field models based on effective field theory on the equation of state and the neutrino mean free path in neutron stars have been studied. Using a procedure similar to Ref. [1] in treating the isovector sector, a parameter set (G2*) that predicts a much smaller proton fraction than the standard one (G2) can be obtained. We found that the G2* has a softer equation of state compared to the G2 at higher densities and the disappearance of the anomalous behavior of the neutrino mean free path in neutron star does not depend on the proton fraction.
nucl-th/0512098 [abs, ps, pdf, other] :: Title: Neutron star cooling constraints for color superconductivity in hybrid stars
Authors: S. Popov, H. Grigorian, D. Blaschke
Comments: 10 pages, 9 figures, 1 table

We apply the recently developed Log N - Log S test of compact star cooling theories for the first time to hybrid stars with a color superconducting quark matter core. While there is not yet a microscopically founded superconducting quark matter phase which would fulfill constraints from cooling phenomenology, we explore the hypothetical 2SC+X phase and show that the magnitude and density-dependence of the X-gap can be chosen to satisfy a set of tests: temperature - age (T - t), the brightness constraint, Log N - Log S, and the mass spectrum constraint. The latter test appears as a new conjecture from the present investigation.

Replacements

astro-ph/0404407 [abs, ps, pdf, other] :: Title: Stellar Dynamics at the Galactic Center with an Extremely Large Telescope
Authors: Nevin N. Weinberg (1), Milos Milosavljevic (1), Andrea M. Ghez (2) ((1) Caltech, (2) UCLA)
Comments: 14 pages, 5 figures; discussion no longer aperture-specific (TMT -> ELT), matches ApJ version
Journal-ref: Astrophys.J. 622 (2005) 878-891
Note: replaced with revised version Thu, 29 Dec 2005 05:47:07 GMT (204kb)
astro-ph/0505584 [abs, ps, pdf, other] :: Title: Seismic Search for Strange Quark Nuggets
Authors: Eugene T. Herrin, Doris C. Rosenbaum, Vigdor L. Teplitz
Comments: 7 pages and 4 tables, plus 3 attached figures. Revised version responds to helpful comments of Phys. Rev. referee by adding 3 figures, subtracting two tables and taking into account information from QCD
Note: replaced with revised version Fri, 30 Dec 2005 00:58:14 GMT (38kb)
astro-ph/0509731 [abs, ps, pdf, other] :: Title: SN 2005bf: A Possible Transition Event Between Type Ib/c Supernovae and Gamma Ray Bursts
Authors: Gaston Folatelli, Carlos Contreras, M. M. Phillips, S. E. Woosley, Sergei Blinnikov, Nidia Morrell, Nicholas B. Suntzeff, Brian L. Lee, Mario Hamuy, Sergio Gonzalez, Wojtek Krzeminski, Miguel Roth, Weidong Li, Alexei V. Filippenko, Ryan J. Foley, W. L. Freedman, Barry F. Madore, S. E. Persson, David Murphy, Samuel Boissier, Gaspar Galaz, Luis Gonzalez, P. J. McCarthy, Andrew McWilliam, Wojtek Pych
Comments: Accepted ApJ on 15 December 2005, 37 pages, 11 figures; minor changes after refereeing process
Note: replaced with revised version Wed, 28 Dec 2005 21:11:51 GMT (596kb)
astro-ph/0511630 [abs, ps, pdf, other] :: Title: Production and Evolution of Perturbations of Sterile Neutrino Dark Matter
Authors: Kevork Abazajian (LANL)
Comments: submitted to Phys. Rev. D; v3: important correction in comparison with astro-ph/0501562, updated lower and upper mass limits
Note: replaced with revised version Thu, 29 Dec 2005 20:56:28 GMT (62kb)
astro-ph/0511642 [abs, ps, pdf, other] :: Title: Big Bang Nucleosynthesis with an Evolving Radion in the Brane World Scenario
Authors: B. Li, M. -C. Chu
Comments: 10 pages, 5 figures; Comments and references added; Version accepted for publication in Physical Review D
Note: replaced with revised version Thu, 29 Dec 2005 03:51:02 GMT (211kb)
astro-ph/0512188 [abs, ps, pdf, other] :: Title: Ultra High Energy Cosmic Rays from Sequestered X Bursts
Authors: Peter L. Biermann, Paul H. Frampton
Comments: 12 pages LaTeX
Note: replaced with revised version Wed, 28 Dec 2005 21:03:36 GMT (14kb)
astro-ph/0512600 [abs, ps, pdf, other] :: Title: Chandra and XMM-Newton Observations of a Sample of Low-Redshift FRI and FRII Radio-Galaxy Nuclei
Authors: D. A. Evans (1,2), D. M. Worrall (1), M. J. Hardcastle (3), R. P. Kraft (2), M. Birkinshaw (1) ((1) University of Bristol, (2) Harvard-Smithsonian Center for Astrophysics, (3) University of Hertfordshire)
Comments: 44 pages, 5 figures. Minor typographical issues and reference in Section 4.4 updated. Accepted for publication in ApJ
Note: replaced with revised version Fri, 30 Dec 2005 11:24:49 GMT (203kb)
astro-ph/0512618 [abs, ps, pdf, other] :: Title: Mid-infrared properties of X-ray sources in the Extended Groth Strip
Authors: P. Barmby, A. Alonso-Herrero, J.L. Donley, E. Egami, G.G. Fazio, A. Georgakakis, J.-S. Huang, E.S. Laird, S. Miyazaki, K. Nandra, S.Q. Park, P.G. Perez-Gonzlaez, G.H. Rieke, J.R. Rigby, S.P. Willner
Comments: Replaced to correct minor error in Figure 3 axis label. ApJ, in press; 40 pages, 12 figures
Note: replaced with revised version Fri, 30 Dec 2005 15:32:07 GMT (308kb)
astro-ph/0512621 [abs, ps, pdf, other] :: Title: Astrometric Monitoring of Stellar Orbits at the Galactic Center with a Next Generation Large Telescope
Authors: Nevin N. Weinberg (1, 2), Milos Milosavljevic (1), Andrea M. Ghez (3) ((1) Caltech, (2) KITP, (3) UCLA)
Comments: 8 pages, 3 figures. ASP Conf. Series "Astrometry in the Age of the Next Generation of Large Telescopes", 2005, v.338, eds. P. Kenneth Seidelmann and Alice K. B. Monet; references added/updated
Journal-ref: ASP Conf. Proc. 338 (2005) 252
Note: replaced with revised version Fri, 30 Dec 2005 05:59:37 GMT (91kb)
astro-ph/0512628 [abs, ps, pdf, other] :: Title: Multiwavelength Observations of the Blazar Mrk 421 in December 2002 and January 2003
Authors: P. Rebillot, for the VERITAS Collaboration, M. Aller, H. Aller, P. Boltwood, I. Jung, D. Kranich, A. Sillanpaa, A. Sadun
Comments: Accepted for publication in the Astrophysical Journal
Note: replaced with revised version Thu, 29 Dec 2005 20:43:24 GMT (185kb)
gr-qc/0509124 [abs, ps, pdf, other] :: Title: On globally static and stationary cosmologies with or without a cosmological constant and the Dark Energy problem
Authors: Thomas Buchert
Comments: 33 pages, matches published version in Class. Quant. Grav
Note: replaced with revised version Thu, 29 Dec 2005 16:50:08 GMT (37kb)
hep-ph/0509062 [abs, ps, pdf, other] :: Title: Primordial black holes from cosmic necklaces
Authors: Tomohiro Matsuda
Comments: 21 pages, Latex2e, 2 figures
Note: replaced with revised version Thu, 29 Dec 2005 03:38:23 GMT (277kb)
hep-ph/0509064 [abs, ps, pdf, other] :: Title: Dark matter production from cosmic necklaces
Authors: Tomohiro Matsuda
Comments: 20 pages, 2 figures, Latex2e
Note: replaced with revised version Thu, 29 Dec 2005 03:42:52 GMT (43kb)

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Cross-listings

gr-qc/0007007 [abs, ps, pdf, other] :: Title: Numerical Data-Processing Simulations of Microarcsecond Classical and Relativistic Effects in Space Astrometry
Authors: Sergei M. Kopeikin (University of Missouri-Columbia, USA), N.V. Shuygina, M.V. Vasilyev, E.I. Yagudina (Institute of Applied Astronomy, Russia), L.I. Yagudin (Pulkovo Observatory, Russia)
Comments: 5 pages, the talk given at the IAU Coll. 180 "Towards Models and Constants for Sub-Microarcsecond Astrometry", Washington DC, March 26 - April 2, 2000

The accuracy of astrometric observations conducted via a space-borne optical interferometer orbiting the Earth is expected to approach a few microarcseconds. Data processing of such extremely high-precision measurements requires access to a rigorous relativistic model of light ray propagation developed in the framework of General Relativity. The data-processing of the space interferometric observations must rely upon the theory of general-relativistic transformations between the spacecraft, geocentric, and solar barycentric reference systems allowing unique and unambiguous interpretation of the stellar aberration and parallax effects. On the other hand, the algorithm must also include physically adequate treatment of the relativistic effect of light deflection caused by the spherically-symmetric (monopole-dependent) part of the gravitational field of the Sun and planets as well as the quadrupole- and spin-dependent counterparts of it. In some particular cases the gravitomagnetic field induced by the translational motion of the Sun and planets should be also taken into account for unambigious prediction of the light-ray deflection angle. In the present paper we describe the corresponding software program for taking into account all classical (proper motion, parallax, etc.) and relativistic (aberration, deflection of light) effects up to the microarcsecond threshold and demonstrate, using numerical simulations, how observations of stars and/or quasars conducted on board a space optical interferometer orbiting the Earth can be processed and disentangled.
gr-qc/0011031 [abs, ps, pdf, other] :: Title: Theory of Relativistic Reference Frames for High-Precision Astrometric Space Missions
Authors: Sergei M. Kopeikin (University of Missouri-Columbia, USA)
Comments: Plenary talk submitted to the Proceedings of the Spanish Relativity Meeting, ERE2000; 12 pages

Recent modern space missions deliver invaluable information about origin of our universe, physical processes in the vicinity of black holes and other exotic astrophysical objects, stellar dynamics of our galaxy, etc. On the other hand, space astrometric missions make it possible to determine with unparalleled precision distances to stars and cosmological objects as well as their physical characteristics and positions on the celestial sphere. Permanently growing accuracy of space astronomical observations and the urgent need for adequate data processing algorithms require corresponding development of an adequate theory of reference frames along with unambiguous description of propagation of light rays from a source of light to observer. Such a theory must be based on the Einstein's general relativity and account for numerous relativistic effects both in the solar system and outside of its boundary. The main features of the relativistic theory of reference frames are presented in this work. A hierarchy of the frames is described starting from the perturbed cosmological Friedmann-Robertson-Walker metric and going to the observer's frame through the intermediate barycentric and geocentric frames in the solar system. Microarcsecond astrometry and effects of propagation of light rays in time-dependent gravitational fields are discussed as well.
gr-qc/0110101 [abs, ps, pdf, other] :: Title: Gravitomagnetic Effects in the Propagation of Electromagnetic Waves in Variable Gravitational Fields of Arbitrary-Moving and Spinning Bodies
Authors: Sergei Kopeikin, Bahram Mashhoon (Department of Physics and Astronomy, University of Missouri-Columbia)
Comments: 36 pages, 1 figure, submitted to Phys. Rev. D
Journal-ref: Phys.Rev. D65 (2002) 064025

Propagation of light in the gravitational field of self-gravitating spinning bodies moving with arbitrary velocities is discussed. The gravitational field is assumed to be "weak" everywhere. Equations of motion of a light ray are solved in the first post-Minkowskian approximation that is linear with respect to the universal gravitational constant $G$. We do not restrict ourselves with the approximation of gravitational lens so that the solution of light geodesics is applicable for arbitrary locations of source of light and observer. This formalism is applied for studying corrections to the Shapiro time delay in binary pulsars caused by the rotation of pulsar and its companion. We also derive the correction to the light deflection angle caused by rotation of gravitating bodies in the solar system (Sun, planets) or a gravitational lens. The gravitational shift of frequency due to the combined translational and rotational motions of light-ray-deflecting bodies is analyzed as well. We give a general derivation of the formula describing the relativistic rotation of the plane of polarization of electromagnetic waves (Skrotskii effect). This formula is valid for arbitrary translational and rotational motion of gravitating bodies and greatly extends the results of previous researchers. Finally, we discuss the Skrotskii effect for gravitational waves emitted by localized sources such as a binary system. The theoretical results of this paper can be applied for studying various relativistic effects in microarcsecond space astrometry and developing corresponding algorithms for data processing in space astrometric missions such as FAME, SIM, and GAIA.
gr-qc/0510077 [abs, ps, pdf, other] :: Title: Gravitomagnetism and the Lorentz Invariance of Gravity in the Gravitational Light-Ray Deflection Experiments
Authors: Sergei M. Kopeikin (University of Missouri-Columbia, USA), Edward B. Fomalont (National Radio Astronomy Observatory, USA)
Comments: 25 pages including text, 3 figures and 1 table

Experimental verification of the existence of gravitomagnetic fields generated by currents of matter is important for a complete understanding and formulation of gravitational physics. Although the rotational (intrinsic) gravitomagnetic field has been extensively studied and is now being measured by the Gravity Probe B, the extrinsic gravitomagnetic field generated by the translational current of matter is less well studied. The present paper introduces a fundamental speed of gravity parameter and uses the parametrized Einstein and light geodesics equations to show that the extrinsic gravitomagnetic field generated by the translational current of matter can be measured by observing the relativistic time delay caused by the moving object. We prove that the extrinsic gravitomagnetic field is measured by the relativistic effect of the aberration of the gravity force caused by the Lorentz transformation of the metric tensor and the Levi-Civita connection. We applied these concepts to the 2002 deflection experiment of a quasar by Jupiter where the aberration of gravity from its orbital motion was measured with accuracy 20%. We describe a 2005 experiment to measure the gravitational deflection of radio waves from a quasar by the sun, as viewed in the geocentric frame, to improve the measurement accuracy of the aberration of gravity - hence the fundamental speed of gravity - to a few percent.
gr-qc/0510084 [abs, ps, pdf, other] :: Title: General Relativistic Theory of Light Propagation in the Field of Radiative Gravitational Multipoles
Authors: Sergei Kopeikin, Pavel Korobkov (University of Missouri-Columbia, USA)
Comments: 61 pages, 4 figures

The extremely high precision of current observations demands a much better theoretical treatment of relativistic effects in the propagation of electromagnetic signals through variable gravitational fields of isolated astronomical systems emitted gravitational waves. A consistent approach giving a complete and exhaustive solution to this problem in the first post-Minkowskian approximation of General Relativity is presented in this paper.

Replacements

astro-ph/0401126 [abs, ps, pdf, other] :: Title: The elliptical colour-magnitude relation as a discriminant between the monolithic and merger paradigms: the importance of progenitor bias
Authors: Sugata Kaviraj, Julien E. G. Devriendt, Ignacio Ferreras, Sukyoung K. Yi
Comments: replaced with accepted version
Journal-ref: Mon.Not.Roy.Astron.Soc. 360 (2005) 60-68
Note: replaced with revised version Sun, 1 Jan 2006 12:26:59 GMT (268kb)
astro-ph/0402079 [abs, ps, pdf, other] :: Title: On the globular cluster formation history of NGC 5128
Authors: S. Kaviraj, I. Ferreras, S. -J. Yoon, S. K. Yi
Comments: replaced with accepted version
Journal-ref: Astronomy and Astrophysics, Volume 439, Issue 3, September I 2005, pp.913-919
Note: replaced with revised version Sun, 1 Jan 2006 12:40:35 GMT (66kb)
astro-ph/0501091 [abs, ps, pdf, other] :: Title: Hypervirial Models of Stellar Systems
Authors: N. W. Evans, J. An (IoA, Cambridge)
Comments: essentially identical to the published version with an additional appendix
Journal-ref: Mon.Not.Roy.Astron.Soc. 360 (2005) 492-498
Note: replaced with revised version Fri, 30 Dec 2005 22:19:23 GMT (37kb)
astro-ph/0501092 [abs, ps, pdf, other] :: Title: Galaxy Models with Tangentially Anisotropic Velocity Distributions
Authors: J. H. an (1,2), N. W. Evans (1) ((1) Ioa Cambridge, (2) Mki-Mit)
Comments: to appear in AJ, extended appendix, typo corrected from the 2nd version (completely rewritten from the 1st version, see also astro-ph/0508419 for some materials split from the 1st version)
Note: replaced with revised version Fri, 30 Dec 2005 22:25:41 GMT (59kb)
astro-ph/0504367 [abs, ps, pdf, other] :: Title: Can Minor Planets be Used to Assess Gravity in the Outer Solar System?
Authors: Gary L. Page, David S. Dixon, John F. Wallin
Comments: Accepted for publication in The Astrophysical Journal
Note: replaced with revised version Mon, 2 Jan 2006 16:12:03 GMT (36kb)
astro-ph/0505507 [abs, ps, pdf, other] :: Title: Mass-Varying Neutrinos from a Variable Cosmological Constant
Authors: R. Horvat
Comments: 8 pages, minor corrections, two references added, to apear in JCAP
Note: replaced with revised version Mon, 2 Jan 2006 11:55:19 GMT (8kb)
astro-ph/0505630 [abs, pdf] :: Title: A short gamma-ray burst apparently asssociated with an elliptical galaxy at redshift z=0.225
Authors: N. Gehrels, et al
Comments: 16 pages, 3 figures updated figures
Journal-ref: Nature 437 (2005) 851-854
Note: replaced with revised version Mon, 2 Jan 2006 19:21:01 GMT (533kb)
astro-ph/0507250 [abs, ps, pdf, other] :: Title: Scaling Dark Energy in a Five-Dimensional Bouncing Cosmological Model
Authors: Lixin Xu, Hongya Liu
Comments: 13 pages, 1 table, 3 figures, published version, references added
Journal-ref: Int.J.Mod.Phys. D14 (2005) 1947-1958
Note: replaced with revised version Sat, 31 Dec 2005 02:36:21 GMT (111kb)
astro-ph/0508046 [abs, ps, pdf, other] :: Title: The many lives of AGN: cooling flows, black holes and the luminosities and colours of galaxies
Authors: Darren J. Croton, Volker Springel, Simon D. M. White, G. De Lucia, C. S. Frenk, L. Gao, A. Jenkins, G. Kauffmann, J. F. Navarro, N. Yoshida
Comments: 21 pages, 12 figures, replaced with accepted MNRAS version, Millennium Run semi-analytic galaxy catalogues are available for download at this http URL (~9 million galaxies brighter than -17.4 in r), mini Millennium Run catalogues also available for testing purposes
Journal-ref: Croton D. J., et al., 2006, MNRAS, 365, 11
Note: replaced with revised version Sat, 31 Dec 2005 06:39:49 GMT (791kb)
astro-ph/0508593 [abs, ps, pdf, other] :: Title: Identification of 8 INTEGRAL hard X-ray sources with Chandra
Authors: S. Sazonov (1,2), E. Churazov (1,2), M. Revnivtsev (1,2), A. Vikhlinin (3,2), R. Sunyaev (1,2) (1-MPA, 2-IKI, 3-CfA)
Comments: 4 pages, 2 figures, corrected Fig. 2
Journal-ref: Astronomy & Astrophysics 444, L37 (2005)
Note: replaced with revised version Mon, 2 Jan 2006 16:52:00 GMT (107kb)
astro-ph/0510634 [abs, ps, pdf, other] :: Title: Spectral distortions to the Cosmic Microwave Background from the recombination of hydrogen and helium
Authors: Wan Yan Wong, Sara Seager, Douglas Scott
Comments: 12 pages, 12 figures, accepted for publication in MNRAS
Note: replaced with revised version Fri, 30 Dec 2005 21:36:44 GMT (192kb)
astro-ph/0512065 [abs, ps, pdf, other] :: Title: Explosions of O-Ne-Mg Cores, the Crab Supernova, and Subluminous Type II-P Supernovae
Authors: F.S. Kitaura, H.-Th. Janka, W. Hillebrandt (MPI for Astrophysics, Garching)
Comments: 6 pages, 5 figures; referee's comments included; Astronomy & Astrophysics, accepted
Note: replaced with revised version Mon, 2 Jan 2006 14:05:46 GMT (141kb)
astro-ph/0512578 [abs, ps, pdf, other] :: Title: The Optical Gravitational Lensing Experiment. Miras and Semiregular Variables in the Large Magellanic Cloud
Authors: I. Soszynski, A. Udalski, M. Kubiak, M.K. Szymanski, G. Pietrzynski, K. Zebrun, O. Szewczyk, L. Wyrzykowski, K. Ulaczyk
Comments: 18 pages, 6 figures, LaTeX. Photometric data presented in the paper are available from the OGLE Internet archive: this http URL or its US mirror: this http URL
Journal-ref: Acta Astron. 55 (2005) 331
Note: replaced with revised version Sat, 31 Dec 2005 05:38:48 GMT (1000kb)
astro-ph/0512646 [abs, ps, pdf, other] :: Title: Magnetized Supramassive Neutron Star Collapse: A New Model For X-Ray Flares In Early GRB Afterglows
Authors: W. H. Gao
Comments: 6 pages. submitted to ApJLetter
Note: replaced with revised version Mon, 2 Jan 2006 06:25:04 GMT (6kb)
gr-qc/0508121 [abs, ps, pdf, other] :: Title: Probing spacetime foam with extragalactic sources
Authors: W.A. Christiansen, Y. Jack Ng, H. van Dam (University of North Carolina)
Comments: LaTeX, 11 pages, 1 figure; version submitted to PRL; several references added; very useful comments and suggestions by Eric Perlman incorporated
Note: replaced with revised version Fri, 30 Dec 2005 21:39:08 GMT (19kb)
hep-th/0507068 [abs, ps, pdf, other] :: Title: The conformal status of $\omega=-3/2$ Brans-Dicke cosmology
Authors: Mariusz P. Dabrowski, Tomasz Denkiewicz, David Blaschke
Comments: REVTEX4, 19 pages, 8 figures, major revisions, title changed
Note: replaced with revised version Mon, 2 Jan 2006 19:00:20 GMT (290kb)

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gr-qc/0512005 [abs, ps, pdf, other] :: Title: Quasinormal modes of black holes and dissipative open systems
Authors: Sang Pyo Kim (Kunsan Nat'l Univ.)
Comments: RevTex 9 pages, one figure; Talks at Black Hole V, Canada, 2005 and 9th Italian-Korean Symposium, Korea, 2005; note and references added in proof

After explaining the physical origin of the quasinormal modes of perturbations in the background geometry of a black hole, I critically review the recent proposal for the quantization of the black-hole area based on the real part of quasinormal modes. As instantons due to the barriers of black-hole potentials lie at the root of a discrete set of complex quasinormal modes frequencies, it is likely that the physics of quasinormal modes can be learned from quantum theory. I propose a connection of a system of quasinormal modes of black holes with a dissipative open system, in particular, the Feshbach-Tikochinsky oscillator. This argument is supported in part by the fact that these two systems have the same group structure SU(1,1) and the same group representation of Hamiltonians; thereby, their quantum states exhibit the same behavior.
hep-th/0601008 [abs, ps, pdf, other] :: Title: Dark energy in modified Gauss-Bonnet gravity: late-time acceleration and the hierarchy problem
Authors: Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov, Sergio Zerbini

Dark energy cosmology is considered in a modified Gauss-Bonnet (GB) model of gravity where an arbitrary function of the GB invariant, $f(G)$, is added to the General Relativity action. We show that such theory is endowed with a quite rich cosmological structure: it may naturally lead to an effective cosmological constant, quintessence or phantom cosmic acceleration, with a possible transition from deceleration to acceleration. It is demonstrated in the paper that this theory is perfectly viable, since it is compliant with Solar System constraints. Specific properties of $f(G)$ gravity in a de Sitter universe, such as dS and SdS solutions, their entropy and its explicit one-loop quantization are studied. The issue of a possible solution of the hierarchy problem in modified gravities is addressed too.
nucl-th/0601002 [abs, ps, pdf, other] :: Title: Neutrino Electromagnetic Form Factors Effect on the Neutrino Cross Section in Dense Matter
Authors: A. Sulaksono, C.K. Williams, P.T.P. Hutauruk, T. Mart
Comments: 24 pages, 10 figures, submitted to Physical Review C

The sensitivity of the differential cross section of the interaction between neutrino-electron with dense matter to the possibly nonzero neutrino electromagnetic properties has been investigated. Here, the relativistic mean field model inspired by effective field theory has been used to describe non strange dense matter, both with and without the neutrino trapping. We have found that the cross section becomes more sensitive to the constituent distribution of the matter, once electromagnetic properties of the neutrino are taken into account. The effects of electromagnetic properties of neutrino on the cross section become more significant for the neutrino magnetic moment mu_nu > 10^{-10} mu_B and for the neutrino charge radius R > 10^{-5} MeV^{-1}.
physics/0512208 [abs, ps, pdf, other] :: Title: General stability criterion of two-dimensional inviscid parallel flow
Authors: Liang Sun
Comments: revtex4, 4 pages,2 figures
Subj-class: Fluid Dynamics; Atmospheric and Oceanic Physics; Geophysics

General stability criterions of two-dimensional inviscid parallel flow are obtained analytically for the first time. First, a criterion for stability is found as $\frac{U''}{U-U_s}>-\mu_1$ everywhere in the flow, where $U_s$ is the velocity at inflection point, $\mu_1$ is eigenvalue of Poincar\'{e}'s problem. Second, we also prove a principle that the flow is stable, if and only if all the disturbances with $c_r=U_s$ are neutrally stable. Finally, following this principle, a criterion for instability is found as $\frac{U''}{U-U_s}<-\mu_1$ everywhere in the flow. These results extend the former theorems obtained by Rayleigh, Tollmien and Fj{\o}rtoft and will lead future works to investigate the mechanism of hydrodynamic instability.

Replacements

astro-ph/0507422 [abs, ps, pdf, other] :: Title: Atmosphere, Interior, and Evolution of the Metal-Rich Transiting Planet HD 149026b
Authors: J. J. Fortney, D. Saumon, M. S. Marley, K. Lodders, R. S. Freedman
Comments: Accepted to the Astrophysical Journal. 18 pages, including 10 figures. New section on the atmosphere of planet HD 189733b. Enhanced discussion of atmospheric Ti chemistry and core mass for HD 149026b
Note: replaced with revised version Tue, 3 Jan 2006 19:32:19 GMT (224kb)
astro-ph/0510367 [abs, ps, pdf, other] :: Title: Local Ignition in Carbon/Oxygen White Dwarfs -- I: One-zone Ignition and Spherical Shock Ignition of Detonations
Authors: L. Jonathan Dursi, F. X. Timmes
Comments: 29 pages; accepted to ApJ. Comments welcome at this http URL . Updated version addressing referee comments
Note: replaced with revised version Mon, 2 Jan 2006 22:02:54 GMT (236kb)
astro-ph/0511531 [abs, ps, pdf, other] :: Title: Calibration of the Rossi X-ray Timing Explorer Proportional Counter Array
Authors: K. Jahoda (1), C. B. Markwardt (1,2), Y. Radeva (2,3), A. Rots (4), M. J. Stark (5), J. H. Swank (1), T. E. Strohmayer (1), W. Zhang (1) ((1) GSFC, (2) U. MD., (3) Connecticut College, (4) Harvard-Smithsonian CfA, (5) Lafayette College)
Comments: 77 pages, 34 figures. accepted by Ap J Supplement for April 2006 issue. This paper and additional calibration information are available from this http URL pcapage.html. Revised version contains minor changes to match accepted version
Note: replaced with revised version Tue, 3 Jan 2006 15:04:47 GMT (732kb)
astro-ph/0512501 [abs, ps, pdf, other] :: Title: The Origin of Magnetic Fields in Galaxies: Observational Tests with the Square Kilometre Array
Authors: Rainer Beck (MPI fuer Radioastronomie, Bonn, Germany)
Comments: 4 pages, 3 figures. Conference Proceedings to be published in "The Origin and Evolution of Cosmic Magnetism", eds. R. Beck, G. Brunetti, L. Feretti, and B. Gaensler (Astronomische Nachrichten); Typos corrected 03/01/2006
Note: replaced with revised version Tue, 3 Jan 2006 16:25:15 GMT (285kb)
astro-ph/0512618 [abs, ps, pdf, other] :: Title: Mid-infrared properties of X-ray sources in the Extended Groth Strip
Authors: P. Barmby, A. Alonso-Herrero, J.L. Donley, E. Egami, G.G. Fazio, A. Georgakakis, J.-S. Huang, E.S. Laird, S. Miyazaki, K. Nandra, S.Q. Park, P.G. Perez-Gonzalez, G.H. Rieke, J.R. Rigby, S.P. Willner
Comments: Replaced to correct minor error in Figure 3 axis label and typo in author list. ApJ, in press; 40 pages, 12 figures
Note: replaced with revised version Tue, 3 Jan 2006 13:40:45 GMT (308kb)
astro-ph/0512655 [abs, ps, pdf, other] :: Title: Pulsar kicks and asymmetric neutrino propagation in proto-neutron stars
Authors: J. Berdermann, D. Blaschke, H. Grigorian, D. N. Voskresensky
Comments: 8 pages, 6 figures, Prepared for the proceedings of the International School of Nuclear Physics: Neutrinos in Cosmology, in Astro, Particle and Nuclear Physics, Erice, Italy, Sept. 16-24, 2005
Note: replaced with revised version Tue, 3 Jan 2006 06:50:22 GMT (231kb)
astro-ph/0601003 [abs, ps, pdf, other] :: Title: Cosmic evolution of the galaxy mass and luminosity functions by morphological type from multi-wavelength data in the CDF-South
Authors: A. Franceschini, G. Rodighiero, P. Cassata, S. Berta, M. Vaccari, M. Nonino, E. Vanzella, E. Hatziminaoglou, J. Antichi, S. Cristiani
Comments: paper submitted to A&A, version revised accounting for all referee comments
Note: replaced with revised version Tue, 3 Jan 2006 10:50:56 GMT (616kb)
gr-qc/0503060 [abs, ps, pdf, other] :: Title: On three quantization methods for particle on hyperboloid
Authors: Jean-Pierre Gazeau, Marc Lachieze-Rey, Wlodzimierz Piechocki
Comments: 22 pages, no figures, revtex
Note: replaced with revised version Tue, 3 Jan 2006 14:26:24 GMT (23kb)

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Cross-listings

gr-qc/0601007 [abs, ps, pdf, other] :: Title: Gravitational Effects of Varying Alpha Strings
Authors: J. Menezes, P. P. Avelino, C. Santos
Comments: 8 pages, 2 figures, to be published in Int. Journ. of Mod. Phys. A

We study spatial variations of the fine-structure constant in the presence of static straight cosmic strings in the weak-field approximation in Einstein gravity. We work in the context of a generic Bekenstein-type model and consider a gauge kinetic function linear in the scalar field. We determine an analytical form for the scalar field and the string metric at large distances from the core. We show that the gravitational effects of $\alpha$-varying strings can be seen as a combination of the gravitational effects of global and local strings. We also verify that at large distances to the core the space-time metric is similar to that of a global string. We study the motion of test particles approaching from infinity and show that photons are scattered to infinity while massive particles are trapped in bounded trajectories. We also calculate an overall limit on the magnitude of the variation of $\alpha$ for a GUT string, by considering suitable cosmological constraints coming from the Equivalence Principle.
hep-ph/0510083 [abs, ps, pdf, other] :: Title: Bounds on Low Scale Gravity from RICE data and Cosmogenic Neutrino Flux Models
Authors: Shahid Hussain, Douglas W. McKay
Comments: Case with heavy-nucleus-based neutrino fluxes added; references added; 9 pages, 3 figs., submitted to Phys. Lett. B

We explore limits on low scale gravity models set by results from the Radio Ice Cherenkov Experiment's (RICE) ongoing search for cosmic ray neutrinos in the cosmogenic, or GZK, energy range. The bound on M_D, the fundamental scale of gravity, depends upon cosmogenic flux model, black hole formation and decay treatments, inclusion of graviton mediated elastic neutrino processes, and the number of large extra dimensions, d. Assuming proton-based cosmogenic flux models that cover a broad range of flux possibilities, we find bounds in the interval 0.9 TeV <M_D< 10 TeV. Heavy nucleus-based models generally lead to smaller fluxes and correspondingly weaker bounds. Values d = 5, 6 and 7, for which laboratory and astrophysical bounds on LSG models are less restrictive, lead to essentially the same limits on M_D.
hep-ph/0601014 [abs, ps, pdf, other] :: Title: PBH and DM from cosmic necklaces
Authors: Tomohiro Matsuda
Comments: 4 pages, 2 figures, Talk given at the conference JGRG held at Tokyo Institute of Technology, Tokyo, Japan, during 28Nov- 02Dec 2005

Cosmic strings in the brane Universe have recently gained a great interest. I think the most interesting story is that future cosmological observations distinguish them from the conventional cosmic strings. If the strings are the higher-dimensional objects that can (at least initially) move along the compactified space, and finally settle down to (quasi-)degenerated vacua in the compactified space, then kinks should appear on the strings, which interpolate between the degenerated vacua. These kinks look like ``beads'' on the strings, which means that the strings turn into necklaces. Moreover, in the case that the compact manifold is not simply connected, the string loop that winds around a non-trivial circle is stable due to the topological reason. Since the existence of degenerated vacua and a non-trivial circle is the common feature of the brane models, it is important to study cosmological constraints on the cosmic necklaces and their stable winding states in the brane Universe.
physics/0601011 [abs, ps, pdf, other] :: Title: A paradigmatic model of Earth's magnetic field reversals
Authors: F. Stefani, G. Gerbeth, U. Guenther
Comments: 7 pages, 6 figures, submitted to Magnetohydrodynamics
Subj-class: Geophysics; Plasma Physics

The irregular polarity reversals of the Earth's magnetic field have attracted much interest during the last decades. Despite the fact that recent numerical simulations of the geodynamo have shown nice polarity transitions, the very reason and the basic mechanism of reversals are far from being understood. Using a paradigmatic mean-field dynamo model with a spherically symmetric helical turbulence parameter alpha we attribute the essential features of reversals to the magnetic field dynamics in the vicinity of an exceptional point of the spectrum of the non-selfadjoint dynamo operator. At such exceptional (branch) points of square root type two real eigenvalues coalesce and continue as a complex conjugated pair of eigenvalues. Special focus is laid on the comparison of numerically computed time series with paleomagnetic observations. It is shown that the considered dynamo model with high supercriticality can explain the observed time scale and the asymmetric shape of reversals with a slow decay and a fast field recovery.
physics/0601012 [abs, ps, pdf, other] :: Title: Development of Ground-testable Phase Fresnel Lenses in Silicon
Authors: John Krizmanic, Brian Morgan, Robert Streitmatter, Neil Gehrels, Keith Gendreau, Zaven Arzoumanian, Reza Ghodssi, Gerry Skinner
Comments: Presented at GammaWave05: "Focusing Telescopes in Nuclear Astrophysics", Bonifacio, Corsica, September 2005, to be published in Experimental Astronomy, 8 pages, 3 figures
Subj-class: Optics

Diffractive/refractive optics, such as Phase Fresnel Lenses (PFL's), offer the potential to achieve excellent imaging performance in the x-ray and gamma-ray photon regimes. In principle, the angular resolution obtained with these devices can be diffraction limited. Furthermore, improvements in signal sensitivity can be achieved as virtually the entire flux incident on a lens can be concentrated onto a small detector area. In order to verify experimentally the imaging performance, we have fabricated PFL's in silicon using gray-scale lithography to produce the required Fresnel profile. These devices are to be evaluated in the recently constructed 600-meter x-ray interferometry testbed at NASA/GSFC. Profile measurements of the Fresnel structures in fabricated PFL's have been performed and have been used to obtain initial characterization of the expected PFL imaging efficiencies.

Replacements

astro-ph/0510102 [abs, ps, pdf, other] :: Title: On the Correlations of Massive Black Holes with their Host Galaxies
Authors: Gregory S. Novak, S. M. Faber, Avishai Dekel
Comments: 22 pages, 3 figures. Made editorial changes to correspond to published version
Journal-ref: ApJ 637:96 (2006)
Note: replaced with revised version Wed, 4 Jan 2006 20:25:27 GMT (65kb)
astro-ph/0511001 [abs, ps, pdf, other] :: Title: Halo Structures of Gravitational Lens Galaxies
Authors: Jaiyul Yoo (1), Christopher S. Kochanek (1), Emilio E. Falco (2), Brian A. McLeod (2) ((1)The Ohio State University,(2)Harvard-Smithsonian Center for Astrophysics)
Comments: 10 pages, 5 figures, accepted for publication in The Astrophysical Journal
Note: replaced with revised version Wed, 4 Jan 2006 18:40:39 GMT (182kb)
astro-ph/0511362 [abs, ps, pdf, other] :: Title: Effects of galaxy interactions in different environments
Authors: M. Sol Alonso, Diego G. Lambas, Patricia B. Tissera, Georgina Coldwell
Comments: accepted MNRAS
Note: replaced with revised version Wed, 4 Jan 2006 15:13:26 GMT (100kb)
astro-ph/0511488 [abs, ps, pdf, other] :: Title: Future magnetic fields studies using the Planck Surveyor experiment
Authors: Torsten A. Ensslin, Corina Vogt, Andre Waelkens, Alexander A. Schekochihin
Comments: invited talk at conference on `The Origin and Evolution of Cosmic Magnetism' in Bologna 2005, eds. R. Beck, G. Brunetti, L. Feretti, and B. Gaensler, to appear in Astronomische Nachrichten, 6 pages, 3 figures, typo corrected
Note: replaced with revised version Wed, 4 Jan 2006 11:13:06 GMT (566kb)
astro-ph/0511617 [abs, pdf] :: Title: Underwater Acoustic Detection of Ultra High Energy Neutrinos
Authors: V. Niess, V. Bertin
Comments: 18 pages, 13 figures
Note: replaced with revised version Wed, 4 Jan 2006 11:17:13 GMT (351kb)
astro-ph/0511768 [abs, ps, pdf, other] :: Title: An analytic investigation of the scatter in the integrated X-ray properties of galaxy groups and clusters
Authors: Michael L. Balogh (1), Arif Babul (2), G. Mark Voit (3), Ian G. McCarthy (2,4), Laurence R. Jones, Geraint F. Lewis (5), Harald Ebeling (6) ((1) Waterloo, (2) Victoria, (3) Michigan State, (4) Durham, (5) Sydney, (6) IfA Hawaii)
Comments: MNRAS, accepted. 12 pages, mnras style, with 12 inline figures. Replaced with minor changes to update references and match published version
Note: replaced with revised version Tue, 3 Jan 2006 22:25:11 GMT (118kb)
astro-ph/0601015 [abs, pdf] :: Title: Radioactive 26Al and massive stars in the Galaxy
Authors: Roland Diehl, Hubert Halloin, Karsten Kretschmer, Giselher G. Lichti, Volker Schoenfelder, Andrew W.Strong, Andreas von Kienlin, Wei Wang, Pierre Jean, Juergen Knoedlseder, Jean-Pierre Roques, Georg Weidenspointner, Stephane Schanne, Dieter H. Hartmann, Christoph Winkler, Cornelia Wunderer
Comments: accepted for publication in Nature, 24 pages including Online Supplements, 11 figures, 1 table
Journal-ref: Nature Vol. 439, p45-47 (2006)
Note: replaced with revised version Wed, 4 Jan 2006 09:53:31 GMT (760kb)
astro-ph/0601036 [abs, ps, pdf, other] :: Title: The effect of environment on the UV colour-magnitude relation of early-type galaxies
Authors: K. Schawinski, S. Kaviraj, S. Khochfar, S.-J. Yoon, S. K. Yi, J.-M. Deharveng, A. Boselli, T. Barlow, T. Conrow, K. Forster, P. Friedman, D. C. Martin, P. Morrissey, S. Neff, D. Schiminovich, M. Seibert, T. Small, T.Wyder, L. Bianchi, J. Donas, T. Heckman, Y.-W. Lee, B. Madore, B. Milliard, R. M. Rich, A. Szalay
Comments: Accepted for publication in ApJ, paper with high-resolution figures can be downloaded at: this http URL
Note: replaced with revised version Wed, 4 Jan 2006 14:41:55 GMT (468kb)
hep-ph/0512317 [abs, ps, pdf, other] :: Title: Dark Matter and Gamma-Rays From Draco: MAGIC, GLAST and CACTUS
Authors: Lars Bergstrom, Dan Hooper
Comments: 8 pages, 3 figures, 2 tables
Note: replaced with revised version Tue, 3 Jan 2006 22:37:27 GMT (43kb)

For subscribe options to combined physics archives,
e-mail To: physics@arXiv.org, Subject: subscribe
-----------------------------------------------------------------------------
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For a list of archive mirror sites, see this http URL
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Third-party submissions cause excessive problems.
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E-mail submissions have been discontinued in favor of better support for
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