http://prd.aps.org/ Recently published articles in Phys. Rev. D in the Table of Content section "Astrophysics & Cosmology" en-us Copyright (c) 2009 The American Physical Society 2009-11-05T23:46:01-05:00 assocpub@aps.org rss@aps.org hourly 4 2009-11-05T23:46:01-05:00 rss@aps.org http://link.aps.org/doi/10.1103/PhysRevD.80.103505 Author(s): Sergey V. Sushkov<br/>We consider a gravitational theory of a scalar field ϕ with nonminimal derivative coupling to curvature. The coupling terms have the form κ_{1} Rϕ_{,μ} ϕ^{,μ} and κ_{2} R_{μν} ϕ^{,μ} ϕ^{,ν} , where κ_{1} and κ_{2} are coupling parameters with dimensions of length squared. In general, ...<br/>[Phys. Rev. D 80, 103505] Published Thu Nov 05, 2009 Sergey V. Sushkov 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.103505 Phys. Rev. D 80, 103505 text/html article Physical Review D 80 10 2009-11-05T00:00:00-05:00 103505 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.103504 Author(s): Kazunori Kohri, Anupam Mazumdar, and Narendra Sahu<br/>It is quite possible that the reheat temperature of the Universe is extremely low close to the scale of big bang nucleosynthesis, i.e. T_{R} ∼1–10  MeV. At such low reheat temperatures generating matter, antimatter asymmetry and synthesizing dark matter particles are challenging issues which...<br/>[Phys. Rev. D 80, 103504] Published Thu Nov 05, 2009 Kazunori Kohri, Anupam Mazumdar, and Narendra Sahu 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.103504 Phys. Rev. D 80, 103504 text/html article Physical Review D 80 10 2009-11-05T00:00:00-05:00 103504 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.103503 Author(s): Timothy Clifton and Pedro G. Ferreira<br/>We consider a model of the Universe in which the matter content is in the form of discrete islands, rather than a continuous fluid. In the appropriate limits the resulting large-scale dynamics approach those of a Friedmann-Robertson-Walker (FRW) universe. The optical properties of such a space-time,...<br/>[Phys. Rev. D 80, 103503] Published Thu Nov 05, 2009 Timothy Clifton and Pedro G. Ferreira 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.103503 Phys. Rev. D 80, 103503 text/html article Physical Review D 80 10 2009-11-05T00:00:00-05:00 103503 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.103003 Author(s): Feryal Özel and Dimitrios Psaltis<br/>The properties of matter at ultrahigh densities, low temperatures, and with a significant asymmetry between protons and neutrons can be studied exclusively through astrophysical observations of neutron stars. We show that measurements of the masses and radii of neutron stars can lead to tight constr...<br/>[Phys. Rev. D 80, 103003] Published Thu Nov 05, 2009 Feryal Özel and Dimitrios Psaltis 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.103003 Phys. Rev. D 80, 103003 text/html article Physical Review D 80 10 2009-11-05T00:00:00-05:00 103003 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.103002 Author(s): Frank Grave, Michael Buser, Thomas Müller, Günter Wunner, and Wolfgang P. Schleich<br/>In this work we derive the analytical solution of the geodesic equations of Gödel’s universe for both particles and light in a special set of coordinates, which reveals the physical properties of this spacetime in a very transparent way. We also recapitulate the equations of isometric transport f...<br/>[Phys. Rev. D 80, 103002] Published Thu Nov 05, 2009 Frank Grave, Michael Buser, Thomas Müller, Günter Wunner, and Wolfgang P. Schleich 2009-11-05T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.103002 Phys. Rev. D 80, 103002 text/html article Physical Review D 80 10 2009-11-05T00:00:00-05:00 103002 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.103502 Author(s): Xiao-Jun Bi, Robert Brandenberger, Paolo Gondolo, Tianjun Li, Qiang Yuan, and Xinmin Zhang<br/>In this paper we propose a dark matter model and study aspects of its phenomenology. Our model is based on a new dark matter sector with a U(1)^{′} gauge symmetry plus a discrete symmetry added to the standard model of particle physics. The new fields of the dark matter sector have no hadronic cha...<br/>[Phys. Rev. D 80, 103502] Published Wed Nov 04, 2009 Xiao-Jun Bi, Robert Brandenberger, Paolo Gondolo, Tianjun Li, Qiang Yuan, and Xinmin Zhang 2009-11-04T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.103502 Phys. Rev. D 80, 103502 text/html article Physical Review D 80 10 2009-11-04T00:00:00-05:00 103502 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.103501 Author(s): Motohiko Kusakabe, Toshitaka Kajino, Takashi Yoshida, and Grant J. Mathews<br/>It has been suggested that relic long-lived strongly interacting massive particles (SIMPs, or X particles) existed in the early universe. We study effects of such long-lived unstable SIMPs on big bang nucleosynthesis (BBN) assuming that such particles existed during the BBN epoch, but then decayed l...<br/>[Phys. Rev. D 80, 103501] Published Mon Nov 02, 2009 Motohiko Kusakabe, Toshitaka Kajino, Takashi Yoshida, and Grant J. Mathews 2009-11-02T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.103501 Phys. Rev. D 80, 103501 text/html article Physical Review D 80 10 2009-11-02T00:00:00-05:00 103501 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.103001 Author(s): Naoki Seto<br/>Gravitational waves (GWs) from cosmological double neutron star binaries (NS+NS) can be significantly demagnified by the strong gravitational lensing effect, and the proposed future missions such as the Big Bang Observer or Deci-hertz Interferometer Gravitational Wave Observatory might miss some of ...<br/>[Phys. Rev. D 80, 103001] Published Mon Nov 02, 2009 Naoki Seto 2009-11-02T00:00:00-05:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.103001 Phys. Rev. D 80, 103001 text/html article Physical Review D 80 10 2009-11-02T00:00:00-05:00 103001 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083534 Author(s): G. Bregar and N. S. Mankoč Borštnik<br/>We investigate the possibility that the dark matter consists of clusters of the heavy family quarks and leptons with zero Yukawa couplings to the lower families. Such a family is predicted by the approach unifying spin and charges as the fifth family. We make a rough estimation of properties of bary...<br/>[Phys. Rev. D 80, 083534] Published Fri Oct 30, 2009 G. Bregar and N. S. Mankoč Borštnik 2009-10-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083534 Phys. Rev. D 80, 083534 text/html article Physical Review D 80 8 2009-10-30T00:00:00-04:00 083534 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083533 Author(s): Martin Kunz, Andrew R. Liddle, David Parkinson, and Changjun Gao<br/>Cosmological observations are normally fit under the assumption that the dark sector can be decomposed into dark matter and dark energy components. However, as long as the probes remain purely gravitational, there is no unique decomposition and observations can only constrain a single dark fluid; th...<br/>[Phys. Rev. D 80, 083533] Published Fri Oct 30, 2009 Martin Kunz, Andrew R. Liddle, David Parkinson, and Changjun Gao 2009-10-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083533 Phys. Rev. D 80, 083533 text/html article Physical Review D 80 8 2009-10-30T00:00:00-04:00 083533 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083011 Author(s): Trevor Stevens and Mikkel B. Johnson<br/>Building on earlier work, we develop an equation-of-motion method for calculating magnetic seed fields generated from currents arising from charged W^{±} fields in bubble collisions during a first-order primordial electroweak phase transition allowed in some proposed extensions of the standard mode...<br/>[Phys. Rev. D 80, 083011] Published Fri Oct 30, 2009 Trevor Stevens and Mikkel B. Johnson 2009-10-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083011 Phys. Rev. D 80, 083011 text/html article Physical Review D 80 8 2009-10-30T00:00:00-04:00 083011 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083532 Author(s): I. Ya. Aref’eva, N. V. Bulatov, L. V. Joukovskaya, and S. Yu. Vernov<br/>The stability of isotropic cosmological solutions in the Bianchi I model is considered. We prove that the stability of isotropic solutions in the Bianchi I metric for a positive Hubble parameter follows from their stability in the Friedmann-Robertson-Walker metric. This result is applied to models...<br/>[Phys. Rev. D 80, 083532] Published Thu Oct 29, 2009 I. Ya. Aref’eva, N. V. Bulatov, L. V. Joukovskaya, and S. Yu. Vernov 2009-10-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083532 Phys. Rev. D 80, 083532 text/html article Physical Review D 80 8 2009-10-29T00:00:00-04:00 083532 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083531 Author(s): Yasuhiro Sekino and Leonard Susskind<br/>In this paper a holographic description of eternal inflation is developed. We focus on the description of an open Friedmann-Robertson-Walker (FRW) universe that results from a tunneling event in which a false vacuum with positive vacuum energy decays to a supersymmetric vacuum with vanishing cosmolo...<br/>[Phys. Rev. D 80, 083531] Published Wed Oct 28, 2009 Yasuhiro Sekino and Leonard Susskind 2009-10-28T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083531 Phys. Rev. D 80, 083531 text/html article Physical Review D 80 8 2009-10-28T00:00:00-04:00 083531 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083530 Author(s): Michael Kesden<br/>The unique dynamics of the tidal disruption of satellite galaxies is an extremely sensitive probe of long-range interactions between dark-matter particles. Dark-matter forces that are several percent the strength of gravity will lead to order unity changes in the ratio of the number of stars in the ...<br/>[Phys. Rev. D 80, 083530] Published Wed Oct 28, 2009 Michael Kesden 2009-10-28T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083530 Phys. Rev. D 80, 083530 text/html article Physical Review D 80 8 2009-10-28T00:00:00-04:00 083530 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083520 Author(s): Scott F. Daniel<br/>Cosmological departures from general relativity offer a possible explanation for the cosmic acceleration. To linear order, these departures (quantified by the model-independent parameter ϖ, referred to as a “gravitational slip”) amplify or suppress the growth of structure in the universe relati...<br/>[Phys. Rev. D 80, 083520] Published Wed Oct 28, 2009 Scott F. Daniel 2009-10-28T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083520 Phys. Rev. D 80, 083520 text/html article Physical Review D 80 8 2009-10-28T00:00:00-04:00 083520 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083529 Author(s): Bobby Samir Acharya, Gordon Kane, Scott Watson, and Piyush Kumar<br/>Light scalar fields with only gravitational strength couplings are typically present in UV complete theories of physics beyond the standard model. In the early universe it is natural for these fields to dominate the energy density, and their subsequent decay—if prior to big bang nucleosynthesis—...<br/>[Phys. Rev. D 80, 083529] Published Mon Oct 26, 2009 Bobby Samir Acharya, Gordon Kane, Scott Watson, and Piyush Kumar 2009-10-26T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083529 Phys. Rev. D 80, 083529 text/html article Physical Review D 80 8 2009-10-26T00:00:00-04:00 083529 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083528 Author(s): Shun Saito, Masahiro Takada, and Atsushi Taruya<br/>Future or ongoing galaxy redshift surveys can put stringent constraints on neutrinos masses via the high-precision measurements of galaxy power spectrum, when combined with CMB information. In this paper we develop a method to model galaxy power spectrum in the weakly nonlinear regime for a mixed da...<br/>[Phys. Rev. D 80, 083528] Published Mon Oct 26, 2009 Shun Saito, Masahiro Takada, and Atsushi Taruya 2009-10-26T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083528 Phys. Rev. D 80, 083528 text/html article Physical Review D 80 8 2009-10-26T00:00:00-04:00 083528 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083527 Author(s): C. J. A. P. Martins<br/>We apply a recently developed analytic model for the evolution of monopole networks to the case of monopoles attached to one string, usually known as hybrid networks. We discuss scaling solutions for both local and global hybrid networks, and also find an interesting application for the case of vort...<br/>[Phys. Rev. D 80, 083527] Published Mon Oct 26, 2009 C. J. A. P. Martins 2009-10-26T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083527 Phys. Rev. D 80, 083527 text/html article Physical Review D 80 8 2009-10-26T00:00:00-04:00 083527 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083526 Author(s): Juan Racker, Pablo Sisterna, and Hector Vucetich<br/>The perfect fluid in the context of a covariant variable speed of light theory proposed by J. Magueijo is studied. On the one hand the modified first law of thermodynamics together with a recipe to obtain equations of state are obtained. On the other hand the Newtonian limit is performed to obtain t...<br/>[Phys. Rev. D 80, 083526] Published Mon Oct 26, 2009 Juan Racker, Pablo Sisterna, and Hector Vucetich 2009-10-26T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083526 Phys. Rev. D 80, 083526 text/html article Physical Review D 80 8 2009-10-26T00:00:00-04:00 083526 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.087302 Author(s): Eloisa Menegoni, Silvia Galli, James G. Bartlett, C. J. A. P. Martins, and Alessandro Melchiorri<br/>We demonstrate that recent measurements of cosmic microwave background temperature and polarization anisotropy made by the ACBAR, QUAD, and BICEP experiments substantially improve the cosmological constraints on possible variations of the fine structure constant in the early universe. This data, com...<br/>[Phys. Rev. D 80, 087302] Published Fri Oct 23, 2009 Eloisa Menegoni, Silvia Galli, James G. Bartlett, C. J. A. P. Martins, and Alessandro Melchiorri 2009-10-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.087302 Phys. Rev. D 80, 087302 text/html article Physical Review D 80 8 2009-10-23T00:00:00-04:00 087302 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083525 Author(s): Chris Clarkson, Kishore Ananda, and Julien Larena<br/>We investigate the effect that the average backreaction of structure formation has on the dynamics of the cosmological expansion, within the concordance model. Our approach in the Poisson gauge is fully consistent up to second order in a perturbative expansion about a flat Friedmann background, incl...<br/>[Phys. Rev. D 80, 083525] Published Fri Oct 23, 2009 Chris Clarkson, Kishore Ananda, and Julien Larena 2009-10-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083525 Phys. Rev. D 80, 083525 text/html article Physical Review D 80 8 2009-10-23T00:00:00-04:00 083525 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083010 Author(s): Gonzalo A. Palma and Subodh P. Patil<br/>It is well understood that spatial noncommutativity, if indeed realized in nature, is a phenomenon whose effects are not just felt at energy scales comparable to the noncommutativity scale. Loop effects can transmit signatures of any underlying noncommutativity to macroscopic scales (a manifestation...<br/>[Phys. Rev. D 80, 083010] Published Fri Oct 23, 2009 Gonzalo A. Palma and Subodh P. Patil 2009-10-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083010 Phys. Rev. D 80, 083010 text/html article Physical Review D 80 8 2009-10-23T00:00:00-04:00 083010 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.081302 Author(s): Francis-Yan Cyr-Racine, Stefano Profumo, and Kris Sigurdson<br/>It has recently been argued that the PAMELA, ATIC, and PPB-BETS data showing an anomalous excess of high-energy cosmic ray positrons and electrons might be explained by dark matter annihilating in the Galactic halo with a cross section resonantly enhanced compared to its value in the primeval plasma...<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. D 80, 081302] Published Fri Oct 23, 2009 Francis-Yan Cyr-Racine, Stefano Profumo, and Kris Sigurdson 2009-10-23T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.081302 Phys. Rev. D 80, 081302 text/html article Physical Review D 80 8 2009-10-23T00:00:00-04:00 081302 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083524 Author(s): Marina Cortês and Andrew R. Liddle<br/>We investigate the parameter space of two-field inflation models where inflation terminates via a first-order phase transition causing nucleation of bubbles. Such models experience a tension from the need to ensure nearly scale-invariant density perturbations, while avoiding a near scale-invariant b...<br/>[Phys. Rev. D 80, 083524] Published Thu Oct 22, 2009 Marina Cortês and Andrew R. Liddle 2009-10-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083524 Phys. Rev. D 80, 083524 text/html article Physical Review D 80 8 2009-10-22T00:00:00-04:00 083524 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083523 Author(s): Antonio De Felice and Teruaki Suyama<br/>We study the propagation of the scalar modes around a Friedmann-Lemaître-Robertson-Walker universe for general modifications of gravity in the presence of a real scalar field. In general, there will be two propagating scalar perturbation fields, which will have in total 4 degrees of freedom. Two of...<br/>[Phys. Rev. D 80, 083523] Published Thu Oct 22, 2009 Antonio De Felice and Teruaki Suyama 2009-10-22T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083523 Phys. Rev. D 80, 083523 text/html article Physical Review D 80 8 2009-10-22T00:00:00-04:00 083523 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083522 Author(s): Wojciech A. Hellwing and Roman Juszkiewicz<br/>We explore the possibility of improving the ΛCDM model at megaparsec scales by introducing a scalar interaction that increases the mutual gravitational attraction of dark matter particles. Using N-body simulations, we study the spatial distribution of dark matter particles and halos. We measure the...<br/>[Phys. Rev. D 80, 083522] Published Wed Oct 21, 2009 Wojciech A. Hellwing and Roman Juszkiewicz 2009-10-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083522 Phys. Rev. D 80, 083522 text/html article Physical Review D 80 8 2009-10-21T00:00:00-04:00 083522 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083009 Author(s): Francis Halzen, Alexander Kappes, and Aongus Ó Murchadha<br/>Northern hemisphere TeV gamma-ray observatories such as Milagro and Tibet ASγ have demonstrated the importance of all-sky instruments by discovering previously unidentified sources that may be the PeVatrons producing cosmic rays up to the knee in the cosmic ray spectrum. We evaluate the potential o...<br/>[Phys. Rev. D 80, 083009] Published Wed Oct 21, 2009 Francis Halzen, Alexander Kappes, and Aongus Ó Murchadha 2009-10-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083009 Phys. Rev. D 80, 083009 text/html article Physical Review D 80 8 2009-10-21T00:00:00-04:00 083009 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083008 Author(s): A. Neronov and M. Ribordy<br/>We investigate the IceCube detection potential of very high energy neutrinos from blazars, for different classes of hadronic models, taking into account the limits imposed on the neutrino flux by the recent Fermi telescope observations. Assuming the observed γ-ray emission is produced by the decay ...<br/>[Phys. Rev. D 80, 083008] Published Wed Oct 21, 2009 A. Neronov and M. Ribordy 2009-10-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083008 Phys. Rev. D 80, 083008 text/html article Physical Review D 80 8 2009-10-21T00:00:00-04:00 083008 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083521 Author(s): Peter Adshead, Richard Easther, and Eugene A. Lim<br/>We describe an efficient scheme for evaluating higher order contributions to primordial cosmological perturbations using the “in-in” formalism, which is the basis of modern calculations of non-Gaussian and higher order contributions to the primordial spectrum. We show that diagrams with two or m...<br/>[Phys. Rev. D 80, 083521] Published Tue Oct 20, 2009 Peter Adshead, Richard Easther, and Eugene A. Lim 2009-10-20T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083521 Phys. Rev. D 80, 083521 text/html article Physical Review D 80 8 2009-10-20T00:00:00-04:00 083521 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.80.083519 Author(s): Domenico Sapone and Martin Kunz<br/>Dark energy perturbations are normally either neglected or else included in a purely numerical way, obscuring their dependence on underlying parameters like the equation of state or the sound speed. However, while many different explanations for the dark energy can have the same equation of state, t...<br/>[Phys. Rev. D 80, 083519] Published Fri Oct 16, 2009 Domenico Sapone and Martin Kunz 2009-10-16T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.80.083519 Phys. Rev. D 80, 083519 text/html article Physical Review D 80 8 2009-10-16T00:00:00-04:00 083519 D15 D15