Massive spin-2 fields of geometric origin in curved spacetimes
V. P. Nair, S. Randjbar-Daemi, and V. Rubakov
We study the consistency of a model which includes torsion as well as the metric as dynamical fields and has massive spin-2 particle in its spectrum. It is known that this model is tachyon free and ghost free in Minkowski background. We show that this property remains valid and no other pathologies ... [Phys. Rev. D 80, 104031 (2009)] published Mon Nov 23, 2009.
Wormholes in Einstein-Born-Infeld theory
Martin G. Richarte and Claudio Simeone
Spherically symmetric thin-shell wormholes are studied within the framework of Einstein-Born-Infeld theory. We analyze the exotic matter content, and find that for certain values of the Born-Infeld parameter the amount of exotic matter on the shell can be reduced in relation to the Maxwell case. We ... [Phys. Rev. D 80, 104033 (2009)] published Mon Nov 23, 2009.
Scalar-tensor theories with pseudoscalar couplings
Victor Flambaum, Simon Lambert, and Maxim Pospelov
We consider scalar-tensor theories of gravity extended by pseudoscalar couplings to matter and gauge fields and derive constraints on the CP-odd combinations of scalar and pseudoscalar couplings from laboratory spin precession experiments and from the evolution of photon polarization over cosmologic ... [Phys. Rev. D 80, 105021 (2009)] published Mon Nov 23, 2009.
Non-Gaussianity at tree and one-loop levels from vector field perturbations
Cesar A. Valenzuela-Toledo, Yeinzon Rodriguez, and David H. Lyth
We study the spectrum [script P] and bispectrum B of the primordial curvature perturbation zeta when the latter is generated by scalar and vector field perturbations. The tree-level and one-loop contributions from vector field perturbations are worked out considering the possibility that the one-loo ... [Phys. Rev. D 80, 103519 (2009)] published Mon Nov 23, 2009.
Black hole solutions in string theory with Gauss-Bonnet curvature correction
Kei-ichi Maeda, Nobuyoshi Ohta, and Yukinori Sasagawa
We present the black hole solutions and analyze their properties in the superstring effective field theory with the Gauss-Bonnet curvature correction terms. We find qualitative differences in our results from those obtained in the truncated model in the Einstein frame. The main difference in our mod ... [Phys. Rev. D 80, 104032 (2009)] published Mon Nov 23, 2009.
[script N]=8 supergravity on the light cone
Renata Kallosh
We construct the generating functional for the light-cone superfield amplitudes in a chiral momentum superspace. It generates the n-point particle amplitudes which on shell are equivalent to the covariant ones. Based on the action depending on the unconstrained light-cone chiral scalar superfield, t ... [Phys. Rev. D 80, 105022 (2009)] published Mon Nov 23, 2009.
Noether symmetry approach in phantom quintessence cosmology
S. Capozziello, E. Piedipalumbo, C. Rubano, and P. Scudellaro
In the framework of phantom quintessence cosmology, we use the Noether Symmetry Approach to obtain general exact solutions for the cosmological equations. This result is achieved by the quintessential (phantom) potential determined by the existence of the symmetry itself. A comparison between the th ... [Phys. Rev. D 80, 104030 (2009)] published Fri Nov 20, 2009.
Lifshitz black hole in three dimensions
Eloy Ayon-Beato, Alan Garbarz, Gaston Giribet, and Mokhtar Hassaine
We show that three-dimensional massive gravity admits Lifshitz metrics with generic values of the dynamical exponent z as exact solutions. At the point z=3, exact black hole solutions that are asymptotically Lifshitz arise. These spacetimes are three-dimensional analogues of those that were recently ... [Phys. Rev. D 80, 104029 (2009)] published Fri Nov 20, 2009.
Cosmology with unparticles
Bohdan Grzadkowski and Jose Wudka
We discuss cosmological consequences of the existence of physics beyond the standard model that exhibits Banks-Zaks and unparticle behavior in the UV and IR, respectively. We first derive the equation of state for unparticles and use it to obtain the temperature dependence of the corresponding energ ... [Phys. Rev. D 80, 103518 (2009)] published Fri Nov 20, 2009.
Spin-spin interaction in the spin-precession equations
Janos Majar
One of the most active field of research in general relativity is the description of the spin properties of astrophysical objects. The main tool in the description of the gravitational waves emitted by compact binary systems in the inspiral era is the post-Newtonian (PN) approximation, where spin ef ... [Phys. Rev. D 80, 104028 (2009)] published Thu Nov 19, 2009.
CMB lensing constraints on dark energy and modified gravity scenarios
Erminia Calabrese, Asantha Cooray, Matteo Martinelli, Alessandro Melchiorri, Luca Pagano et al.
Weak gravitational lensing leaves a characteristic imprint on the cosmic microwave background temperature and polarization angular power spectra. Here, we investigate the possible constraints on the integrated lensing potential from future cosmic microwave background angular spectra measurements exp ... [Phys. Rev. D 80, 103516 (2009)] published Thu Nov 19, 2009.
Quantization of higher spin fields
J. W. Wagenaar and T. A. Rijken
In this article we quantize (massive) higher spin (1<=j<=2) fields by means of Dirac's constrained Hamilton procedure both in the situation were they are totally free and were they are coupled to (an) auxiliary field(s). A full constraint analysis and quantization is presented by determining and dis ... [Phys. Rev. D 80, 104027 (2009)] published Wed Nov 18, 2009.
Well-posedness of Einstein's equation with redshift data
Christopher J. Winfield
We study the solvability of a system of ordinary differential equations derived from null geodesics of the LemaitreTolmanBondi metric with data given in terms of a so-called redshift parameter. Data are introduced along these geodesics by the luminosity distance function. We check our results with l ... [J. Math. Phys. 50, 113515 (2009)] published Tue Nov 17, 2009.
Holes in the static Einstein universe and a model of the cosmological voids
Andrzej Odrzywolek
A spherically symmetric, static model of the cosmological voids is constructed in the framework of the Tolman-Oppenheimer-Volkov equation with the cosmological constant. Extension of the Tooper result (dimensionless form of the TOV equation) is provided for nonzero Lambda. Then, the equation is simp ... [Phys. Rev. D 80, 103515 (2009)] published Tue Nov 17, 2009.
Emergence of scalar matter from spin foam model
Peng Xu and Yongge Ma
A spin foam model of three dimensional gravity nonminimally coupled with a scalar field is studied. By discretization of the scalar field, the model is worked out precisely in a purely combinational way. It is shown that the quantum physics of the scalar matter is totally encoded into the modified d ... [Phys. Rev. D 80, 104024 (2009)] published Tue Nov 17, 2009.
Hamiltonian of a spinning test particle in curved spacetime
Enrico Barausse, Etienne Racine, and Alessandra Buonanno
Using a Legendre transformation, we compute the unconstrained Hamiltonian of a spinning test particle in a curved spacetime at linear order in the particle spin. The equations of motion of this unconstrained Hamiltonian coincide with the Mathisson-Papapetrou-Pirani equations. We then use the formali ... [Phys. Rev. D 80, 104025 (2009)] published Tue Nov 17, 2009.
Bayesian reconstruction of gravitational wave burst signals from simulations of rotating stellar core collapse and bounce
Christian Rover, Marie-Anne Bizouard, Nelson Christensen, Harald Dimmelmeier, Ik Siong Heng et al.
Presented in this paper is a technique that we propose for extracting the physical parameters of a rotating stellar core collapse from the observation of the associated gravitational wave signal from the collapse and core bounce. Data from interferometric gravitational wave detectors can be used to ... [Phys. Rev. D 80, 102004 (2009)] published Tue Nov 17, 2009.
Accretion process onto super-spinning objects
Cosimo Bambi, Katherine Freese, Tomohiro Harada, Rohta Takahashi, and Naoki Yoshida
The accretion process onto spinning objects in Kerr spacetimes is studied with numerical simulations. Our results show that accretion onto compact objects with Kerr parameter (characterizing the spin) |a|
Electromagnetic absorption cross section of Reissner-Nordstrom black holes revisited
Luis C. B. Crispino, Atsushi Higuchi, and Ednilton S. Oliveira
The absorption cross section of Reissner-Nordstrom black holes for the electromagnetic field is computed numerically for arbitrary frequencies, taking into account the coupling of the electromagnetic and gravitational perturbations. We also compute the conversion coefficients of electromagnetic to g ... [Phys. Rev. D 80, 104026 (2009)] published Tue Nov 17, 2009.
Einstein-Maxwell system in 3+1 form and initial data for multiple charged black holes
Miguel Alcubierre, Juan Carlos Degollado, and Marcelo Salgado
We consider the Einstein-Maxwell system as a Cauchy initial value problem taking the electric and magnetic fields as independent variables. Maxwell's equations in curved spacetimes are derived in detail using a 3+1 formalism and their hyperbolic properties are analyzed, showing that the resulting sy ... [Phys. Rev. D 80, 104022 (2009)] published Mon Nov 16, 2009.
Assisted dark energy
Junko Ohashi and Shinji Tsujikawa
Cosmological scaling solutions, which give rise to a scalar-field density proportional to a background fluid density during radiation and matter eras, are attractive to alleviate the energy scale problem of dark energy. In the presence of multiple scalar fields, the scaling solution can exit to the ... [Phys. Rev. D 80, 103513 (2009)] published Mon Nov 16, 2009.
Exotic smoothness in 4 Dimensions and Semiclassical Euclidean Quantum Gravity. (arXiv:0911.4068v1 [gr-qc])
ePrint arXiv http://arXiv.org/
On Chern-Simons corrections to magnetohydrodynamics equations. (arXiv:0911.3967v1 [gr-qc])
ePrint arXiv http://arXiv.org/
On the fate of vacuum bubbles on matter backgrounds. (arXiv:0911.3910v1 [gr-qc])
ePrint arXiv http://arXiv.org/
Universal Ringdown Amplitudes in Extreme Mass Ratio Inspiral. (arXiv:0911.3899v2 [gr-qc])
ePrint arXiv http://arXiv.org/
Dissipative Processes in the Early Universe: Bulk Viscosity. (arXiv:0911.4105v1 [gr-qc])
ePrint arXiv http://arXiv.org/
Cosmological background solutions and cosmological backreactions. (arXiv:0901.4566v2 [astro-ph.CO] UPDATED)
ePrint arXiv http://arXiv.org/
PPN Parameter $\gamma$ and Solar System Constraints of Massive Brans-Dicke Theories. (arXiv:0911.3401v2 [gr-qc] UPDATED)
ePrint arXiv http://arXiv.org/
Fermions tunneling from higher-dimensional Reissner-Nordstr\"{o}m black hole. (arXiv:0903.1983v3 [gr-qc] UPDATED)
ePrint arXiv http://arXiv.org/
Bayesian coherent analysis of in-spiral gravitational wave signals with a detector network. (arXiv:0911.3820v1 [astro-ph.CO] CROSS LISTED)
ePrint arXiv http://arXiv.org/
Localized Matter and Geometry of the Dirac Field. (arXiv:0911.3671v1 [math-ph] CROSS LISTED)
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