http://prd.aps.org/ Recently published articles in Phys. Rev. D in the Table of Content section "Astrophysics & Cosmology" en-us Copyright (c) 2008 The American Physical Society 2008-05-07T08:05:34-04:00 assocpub@aps.org rss@aps.org hourly 4 2008-05-07T08:05:34-04:00 rss@aps.org http://link.aps.org/doi/10.1103/PhysRevD.77.103504 Author(s): Brandon Bozek, Augusta Abrahamse, Andreas Albrecht, and Michael Barnard<br/>We present an analysis of a scalar field model of dark energy with an exponential potential using the Dark Energy Task Force (DETF) simulated data models. Using Markov Chain Monte Carlo sampling techniques we examine the ability of each simulated data set to constrain the parameter space of the exp...<br/>[Phys. Rev. D 77, 103504] Published Mon May 05, 2008 Brandon Bozek, Augusta Abrahamse, Andreas Albrecht, and Michael Barnard 2008-05-05T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.103504 Phys. Rev. D 77, 103504 text/html article Physical Review D 77 10 2008-05-05T00:00:00-04:00 103504 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.103503 Author(s): Augusta Abrahamse, Andreas Albrecht, Michael Barnard, and Brandon Bozek<br/>We analyze the constraining power of future dark energy experiments for pseudo-Nambu-Goldstone-boson (PNGB) quintessence. Following the Dark Energy Task Force (DETF) methodology, we forecast data for three experimental stages: Stage 2 represents in-progress projects relevant to dark energy; Stage 3 ...<br/>[Phys. Rev. D 77, 103503] Published Mon May 05, 2008 Augusta Abrahamse, Andreas Albrecht, Michael Barnard, and Brandon Bozek 2008-05-05T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.103503 Phys. Rev. D 77, 103503 text/html article Physical Review D 77 10 2008-05-05T00:00:00-04:00 103503 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.103502 Author(s): Michael Barnard, Augusta Abrahamse, Andreas Albrecht, Brandon Bozek, and Mark Yashar<br/>We consider the effect of future dark energy experiments on “Albrecht-Skordis” (AS) models of scalar field dark energy using the Monte Carlo Markov chain method. We deal with the issues of parametrization of these models, and have included spatial curvature as a parameter, finding it to be impo...<br/>[Phys. Rev. D 77, 103502] Published Mon May 05, 2008 Michael Barnard, Augusta Abrahamse, Andreas Albrecht, Brandon Bozek, and Mark Yashar 2008-05-05T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.103502 Phys. Rev. D 77, 103502 text/html article Physical Review D 77 10 2008-05-05T00:00:00-04:00 103502 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.101301 Author(s): Roberta Camerini, Ruth Durrer, Alessandro Melchiorri, and Antonio Riotto<br/>A primordial gravitational wave background with positive (blue) spectral index is expected in several nonstandard inflationary cosmologies where the stress-energy tensor violates the null energy condition. Here we show that a sizable amount of blue gravitational waves is compatible with current cosm...<br/><img src="http://prola.aps.org/graphics/rapid30x30.gif" width="30" height="30" alt="Rapid Communication"/><br/>[Phys. Rev. D 77, 101301] Published Mon May 05, 2008 Roberta Camerini, Ruth Durrer, Alessandro Melchiorri, and Antonio Riotto 2008-05-05T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.101301 Phys. Rev. D 77, 101301 text/html article Physical Review D 77 10 2008-05-05T00:00:00-04:00 101301 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.103501 Author(s): H. Mohseni Sadjadi<br/>We study the modified theory of gravity in the Friedmann-Robertson-Walker universe composed of several perfect fluids. We consider the power law inflation and determine the equation of state parameters in terms of the parameters of modified gravity’s Lagrangian in the early universe. We also brief...<br/>[Phys. Rev. D 77, 103501] Published Fri May 02, 2008 H. Mohseni Sadjadi 2008-05-02T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.103501 Phys. Rev. D 77, 103501 text/html article Physical Review D 77 10 2008-05-02T00:00:00-04:00 103501 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083008 Author(s): Eric R. Switzer and Christopher M. Hirata<br/>Upcoming precision measurements of the temperature anisotropy of the cosmic microwave background at high multipoles will need to be complemented by a more complete understanding of recombination, which determines the damping of anisotropies on these scales. This is the third in a series of papers de...<br/>[Phys. Rev. D 77, 083008] Published Wed Apr 30, 2008 Eric R. Switzer and Christopher M. Hirata 2008-04-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083008 Phys. Rev. D 77, 083008 text/html article Physical Review D 77 8 2008-04-30T00:00:00-04:00 083008 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083007 Author(s): Christopher M. Hirata and Eric R. Switzer<br/>Interpretation of precision measurements of the cosmic microwave background (CMB) will require a detailed understanding of the recombination era, which determines such quantities as the acoustic oscillation scale and the Silk damping scale. This paper is the second in a series devoted to the subject...<br/>[Phys. Rev. D 77, 083007] Published Wed Apr 30, 2008 Christopher M. Hirata and Eric R. Switzer 2008-04-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083007 Phys. Rev. D 77, 083007 text/html article Physical Review D 77 8 2008-04-30T00:00:00-04:00 083007 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083006 Author(s): Eric R. Switzer and Christopher M. Hirata<br/>Precision measurements of the cosmic microwave background temperature anisotropy on scales ℓ>500 will be available in the near future. Successful interpretation of these data is dependent on a detailed understanding of the damping tail and cosmological recombination of both hydrogen and helium. Thi...<br/>[Phys. Rev. D 77, 083006] Published Wed Apr 30, 2008 Eric R. Switzer and Christopher M. Hirata 2008-04-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083006 Phys. Rev. D 77, 083006 text/html article Physical Review D 77 8 2008-04-30T00:00:00-04:00 083006 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083005 Author(s): J.-M. Frère, F.-S. Ling, and G. Vertongen<br/>High precision planet orbital data extracted from direct observation, spacecraft explorations, and laser ranging techniques enable to constrain the maximal dark matter density of a spherical halo centered around the Sun. If we assume a halo profile with a power-law dependence in the heliocentric dis...<br/>[Phys. Rev. D 77, 083005] Published Wed Apr 30, 2008 J.-M. Frère, F.-S. Ling, and G. Vertongen 2008-04-30T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083005 Phys. Rev. D 77, 083005 text/html article Physical Review D 77 8 2008-04-30T00:00:00-04:00 083005 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083518 Author(s): M. P. Lima, S. Vitenti, and M. J. Rebouças<br/>The energy conditions play an important role in the understanding of several properties of the Universe, including the current accelerating expansion phase and the possible existence of the so-called phantom fields. We show that the integrated bounds provided by the energy conditions on cosmological...<br/>[Phys. Rev. D 77, 083518] Published Tue Apr 29, 2008 M. P. Lima, S. Vitenti, and M. J. Rebouças 2008-04-29T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083518 Phys. Rev. D 77, 083518 text/html article Physical Review D 77 8 2008-04-29T00:00:00-04:00 083518 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083519 Author(s): Veniamin Berezinsky, Vyacheslav Dokuchaev, and Yury Eroshenko<br/>What happened to the central cores of tidally destructed dark matter clumps in the Galactic halo? We calculate the probability of surviving of the remnants of dark matter clumps in the Galaxy by modelling the tidal destruction of the small-scale clumps. It is demonstrated that a substantial fraction...<br/>[Phys. Rev. D 77, 083519] Published Mon Apr 28, 2008 Veniamin Berezinsky, Vyacheslav Dokuchaev, and Yury Eroshenko 2008-04-28T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083519 Phys. Rev. D 77, 083519 text/html article Physical Review D 77 8 2008-04-28T00:00:00-04:00 083519 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083517 Author(s): Frederico Arroja and Kazuya Koyama<br/>We compute the fourth order action in perturbation theory for scalar and second order tensor perturbations for a minimally coupled single field inflationary model, where the inflaton’s Lagrangian is a general function of the field’s value and its kinetic energy. We obtain the fourth order intera...<br/>[Phys. Rev. D 77, 083517] Published Mon Apr 28, 2008 Frederico Arroja and Kazuya Koyama 2008-04-28T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083517 Phys. Rev. D 77, 083517 text/html article Physical Review D 77 8 2008-04-28T00:00:00-04:00 083517 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083516 Author(s): F. E. Costa, J. S. Alcaniz, and J. M. Maia<br/>We discuss observational consequences of a class of cosmological models characterized by the dilution of pressureless matter attenuated with respect to the usual a^{-3} scaling due to the decay of vacuum energy. We carry out a joint statistical analysis of observational data from the new gold sample...<br/>[Phys. Rev. D 77, 083516] Published Fri Apr 25, 2008 F. E. Costa, J. S. Alcaniz, and J. M. Maia 2008-04-25T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083516 Phys. Rev. D 77, 083516 text/html article Physical Review D 77 8 2008-04-25T00:00:00-04:00 083516 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083515 Author(s): Robert J. Scherrer and A. A. Sen<br/>The thawing quintessence model with a nearly flat potential provides a natural mechanism to produce an equation of state parameter, w, close to -1 today. We examine the behavior of such models for the case in which the potential satisfies the slow-roll conditions: [(1/V)(dV/dϕ)]^{2} ≪1 and (1/V)(...<br/>[Phys. Rev. D 77, 083515] Published Fri Apr 25, 2008 Robert J. Scherrer and A. A. Sen 2008-04-25T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083515 Phys. Rev. D 77, 083515 text/html article Physical Review D 77 8 2008-04-25T00:00:00-04:00 083515 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083514 Author(s): Jonathan D. Evans, Lisa M. Hall, and Philippe Caillol<br/>Using techniques from singular perturbation theory, we explicitly calculate the cosmological evolution in a class of modified gravity models. By considering both the CDTT and modified CDTT (mCDTT) models, which aims to explain the current acceleration of the universe with a modification of gravity, ...<br/>[Phys. Rev. D 77, 083514] Published Thu Apr 24, 2008 Jonathan D. Evans, Lisa M. Hall, and Philippe Caillol 2008-04-24T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083514 Phys. Rev. D 77, 083514 text/html article Physical Review D 77 8 2008-04-24T00:00:00-04:00 083514 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083004 Author(s): Suman Bhattacharya and Arthur Kosowsky<br/>Future multifrequency microwave background experiments with arcminute resolution and micro-Kelvin temperature sensitivity will be able to detect the kinetic Sunyaev-Zeldovich effect, providing a way to measure radial peculiar velocities of massive galaxy clusters. We show that cluster peculiar veloc...<br/>[Phys. Rev. D 77, 083004] Published Thu Apr 24, 2008 Suman Bhattacharya and Arthur Kosowsky 2008-04-24T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083004 Phys. Rev. D 77, 083004 text/html article Physical Review D 77 8 2008-04-24T00:00:00-04:00 083004 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083513 Author(s): F. T. Falciano, Marc Lilley, and Patrick Peter<br/>We perform a detailed investigation of the simplest possible cosmological model in which a bounce can occur, namely, that where the dynamics is led by a simple massive scalar field in a general self-interacting potential and a background spacetime with positively curved spatial sections. By means of...<br/>[Phys. Rev. D 77, 083513] Published Mon Apr 21, 2008 F. T. Falciano, Marc Lilley, and Patrick Peter 2008-04-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083513 Phys. Rev. D 77, 083513 text/html article Physical Review D 77 8 2008-04-21T00:00:00-04:00 083513 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083512 Author(s): Antonio Cardoso, Kazuya Koyama, Sanjeev S. Seahra, and Fabio P. Silva<br/>We solve for the behavior of cosmological perturbations in the Dvali-Gabadadze-Porrati (DGP) braneworld model using a new numerical method. Unlike some other approaches in the literature, our method uses no approximations other than linear theory and is valid on large scales. We examine the behavior...<br/>[Phys. Rev. D 77, 083512] Published Mon Apr 21, 2008 Antonio Cardoso, Kazuya Koyama, Sanjeev S. Seahra, and Fabio P. Silva 2008-04-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083512 Phys. Rev. D 77, 083512 text/html article Physical Review D 77 8 2008-04-21T00:00:00-04:00 083512 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083511 Author(s): Shuichiro Yokoyama, Teruaki Suyama, and Takahiro Tanaka<br/>We give a concise formula for the non-Gaussianity of the primordial curvature perturbation generated on superhorizon scales in the multiscalar inflation model without assuming slow-roll conditions. This is an extension of our previous work. Using this formula, we study the generation of non-Gaussian...<br/>[Phys. Rev. D 77, 083511] Published Mon Apr 21, 2008 Shuichiro Yokoyama, Teruaki Suyama, and Takahiro Tanaka 2008-04-21T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083511 Phys. Rev. D 77, 083511 text/html article Physical Review D 77 8 2008-04-21T00:00:00-04:00 083511 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083510 Author(s): Timothy R. Dulaney, Moira I. Gresham, and Mark B. Wise<br/>We study the classical stability of an anisotropic space-time seeded by a spacelike, fixed-norm, dynamical vector field in a vacuum-energy-dominated inflationary era. It serves as a model for breaking isotropy during the inflationary era. We find that, for a range of parameters, the linear different...<br/>[Phys. Rev. D 77, 083510] Published Thu Apr 17, 2008 Timothy R. Dulaney, Moira I. Gresham, and Mark B. Wise 2008-04-17T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083510 Phys. Rev. D 77, 083510 text/html article Physical Review D 77 8 2008-04-17T00:00:00-04:00 083510 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083509 Author(s): Levon Pogosian and Mark Wyman<br/>Detecting the parity-odd, or B-mode, polarization pattern in the cosmic microwave background radiation due to primordial gravity waves is considered to be the final observational key to confirming the inflationary paradigm. The search for viable models of inflation from particle physics and string t...<br/>[Phys. Rev. D 77, 083509] Published Tue Apr 15, 2008 Levon Pogosian and Mark Wyman 2008-04-15T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083509 Phys. Rev. D 77, 083509 text/html article Physical Review D 77 8 2008-04-15T00:00:00-04:00 083509 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083508 Author(s): Cinzia Di Porto and Luca Amendola<br/>Many experiments in the near future will test dark energy through its effects on the linear growth of matter perturbations. It is therefore important to find simple and at the same time general parametrizations of the linear growth rate. We show that a simple fitting formula that generalizes previou...<br/>[Phys. Rev. D 77, 083508] Published Mon Apr 14, 2008 Cinzia Di Porto and Luca Amendola 2008-04-14T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083508 Phys. Rev. D 77, 083508 text/html article Physical Review D 77 8 2008-04-14T00:00:00-04:00 083508 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.087302 Author(s): Dan Hooper and Kathryn M. Zurek<br/>It has previously been proposed that annihilating dark matter particles with MeV-scale masses could be responsible for the flux of 511 keV photons observed from the region of the Galactic Bulge. The conventional wisdom, however, is that it is very challenging to construct a viable particle physics ...<br/>[Phys. Rev. D 77, 087302] Published Fri Apr 11, 2008 Dan Hooper and Kathryn M. Zurek 2008-04-11T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.087302 Phys. Rev. D 77, 087302 text/html article Physical Review D 77 8 2008-04-11T00:00:00-04:00 087302 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083507 Author(s): Steven Gratton, Antony Lewis, and George Efstathiou<br/>In this paper we investigate how well Planck and Lyman-α forest data will be able to constrain the sum of the neutrino masses, and thus, in conjunction with flavor oscillation experiments, be able to determine the absolute masses of the neutrinos. It seems possible that Planck, together with a Lyma...<br/>[Phys. Rev. D 77, 083507] Published Fri Apr 11, 2008 Steven Gratton, Antony Lewis, and George Efstathiou 2008-04-11T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083507 Phys. Rev. D 77, 083507 text/html article Physical Review D 77 8 2008-04-11T00:00:00-04:00 083507 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083506 Author(s): A. E. Bernardini and O. Bertolami<br/>We suggest a perturbative approach for generic choices for the universe equation of state and introduce a novel framework for studying mass varying neutrinos (MaVaN’s) coupled to the dark sector. For concreteness, we examine the coupling between neutrinos and the underlying scalar field associated...<br/>[Phys. Rev. D 77, 083506] Published Wed Apr 09, 2008 A. E. Bernardini and O. Bertolami 2008-04-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083506 Phys. Rev. D 77, 083506 text/html article Physical Review D 77 8 2008-04-09T00:00:00-04:00 083506 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083505 Author(s): R. C. Santos and J. A. Lima<br/>The influence of dark matter inhomogeneities on the angular size-redshift test is investigated for a large class of flat cosmological models driven by dark energy plus a cold dark matter component (XCDM). The results are presented in two steps. First, the mass inhomogeneities are modeled by a genera...<br/>[Phys. Rev. D 77, 083505] Published Wed Apr 09, 2008 R. C. Santos and J. A. Lima 2008-04-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083505 Phys. Rev. D 77, 083505 text/html article Physical Review D 77 8 2008-04-09T00:00:00-04:00 083505 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083504 Author(s): S. Carneiro, M. A. Dantas, C. Pigozzo, and J. S. Alcaniz<br/>The cosmological constant Λ, i.e., the energy density stored in the true vacuum state of all existing fields in the Universe, is the simplest and the most natural possibility to describe the current cosmic acceleration. However, despite its observational successes, such a possibility exacerbates th...<br/>[Phys. Rev. D 77, 083504] Published Wed Apr 09, 2008 S. Carneiro, M. A. Dantas, C. Pigozzo, and J. S. Alcaniz 2008-04-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083504 Phys. Rev. D 77, 083504 text/html article Physical Review D 77 8 2008-04-09T00:00:00-04:00 083504 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083503 Author(s): A. D. Dolgov and F. R. Urban<br/>A new mechanism of adjustment of vacuum energy down to the observed value from an initially huge one is considered. The mechanism is based on a very strong variation of the gravitational coupling constant in the very early universe. The model predicts that the noncompensated remnant of vacuum energy...<br/>[Phys. Rev. D 77, 083503] Published Wed Apr 09, 2008 A. D. Dolgov and F. R. Urban 2008-04-09T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083503 Phys. Rev. D 77, 083503 text/html article Physical Review D 77 8 2008-04-09T00:00:00-04:00 083503 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.087301 Author(s): B. K. Agrawal, Raj Kumar, and Shashi K. Dhiman<br/>Correlations in the properties of the static compact stars (CSs) and the ones rotating with the highest observed frequency of 1122 Hz are studied using a large set of equations of state (EOSs). These EOSs span various approaches and their chemical composition varies from the nucleons to hyperons an...<br/>[Phys. Rev. D 77, 087301] Published Tue Apr 08, 2008 B. K. Agrawal, Raj Kumar, and Shashi K. Dhiman 2008-04-08T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.087301 Phys. Rev. D 77, 087301 text/html article Physical Review D 77 8 2008-04-08T00:00:00-04:00 087301 D15 D15 http://link.aps.org/doi/10.1103/PhysRevD.77.083502 Author(s): Robert Brandenberger, Hassan Firouzjahi, and Johanna Karouby<br/>The metric around straight arbitrarily oriented cosmic strings forming a stationary junction is obtained at the linearized level. It is shown that the geometry is flat. The sum rules for lensing by this configuration and the anisotropies of the cosmic microwave background are obtained.<br/>[Phys. Rev. D 77, 083502] Published Mon Apr 07, 2008 Robert Brandenberger, Hassan Firouzjahi, and Johanna Karouby 2008-04-07T00:00:00-04:00 Personal use only, all commercial or other reuse prohibited 10.1103/PhysRevD.77.083502 Phys. Rev. D 77, 083502 text/html article Physical Review D 77 8 2008-04-07T00:00:00-04:00 083502 D15 D15