منابع مشابه
Nonsingular Black Holes in f (R) Theories
We study the structure of a family of static, spherically symmetric space-times generated by an anisotropic fluid and governed by a particular type of f(R) theory. We find that for a range of parameters with physical interest, such solutions represent black holes with the central singularity replaced by a finite size wormhole. We show that time-like geodesics and null geodesics with nonzero ang...
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In this paper we revisit non-spherical perturbations of the Schwarzschild black hole in the context of f(R) gravity. Previous studies were able to demonstrate the stability of the f(R) Schwarzschild black hole against gravitational perturbations in both the even and odd parity sectors. In particular, it was seen that the Regge-Wheeler and Zerilli equations in f(R) gravity obey the same equation...
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We show that some or all of the inventory of r-process nucleosynthesis can be produced in interactions of primordial black holes (PBHs) with neutron stars (NSs) if PBHs with masses 10^{-14} M_{⊙}<M_{PBH}<10^{-8} M_{⊙} make up a few percent or more of dark matter. A PBH captured by a NS sinks to the center of the NS and consumes it from the inside. When this occurs in a rotating millisecond-pe...
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We construct electrically charged AdS5 black hole solutions whose charge, mass and boost-parameters vary slowly with the space-time coordinates. From the perspective of the dual theory, these are equivalent to hydrodynamic configurations with varying chemical potential, temperature and velocity fields. We compute the boundary theory transport coefficients associated with a derivative expansion ...
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We consider hydrodynamics of N = 4 supersymmetric SU(Nc) Yang-Mills plasma at a nonzero density of R-charge. In the regime of large Nc and large ’t Hooft coupling the gravity dual description involves an asymptotically Antide Sitter fivedimensional charged black hole solution of Behrnd, Cvetič and Sabra. We compute the shear viscosity as a function of chemical potentials conjugated to the three...
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ژورنال
عنوان ژورنال: General Relativity and Gravitation
سال: 2011
ISSN: 0001-7701,1572-9532
DOI: 10.1007/s10714-011-1225-3