Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Kastor, David"'
Autor:
Kastor, David, Traschen, Jennie
We study asymptotically AdS generalizations of Melvin spacetimes, describing gravitationally bound tubes of magnetic flux. We find that narrow fluxtubes, carrying strong magnetic fields but little total flux, are approximately unchanged from the $\La
Externí odkaz:
http://arxiv.org/abs/2009.14771
The interplay of black hole and cosmological horizons introduces distinctive thermodynamic behavior for deSitter black holes, including well-known upper bounds for the mass and entropy. We point to a new such feature, a Schottky peak in the heat capa
Externí odkaz:
http://arxiv.org/abs/1907.00248
The mass of an AdS black hole represents its enthalpy, which in addition to internal energy, generally includes the energy required to assemble the system in its environment. In this paper, we consider black holes immersed in a more complex environme
Externí odkaz:
http://arxiv.org/abs/1807.09801
We present an analytic, perturbative solution to the Einstein equations with a scalar field that describes dynamical black holes in a slow-roll inflationary cosmology. We show that the metric evolves quasi-statically through a sequence of Schwarzschi
Externí odkaz:
http://arxiv.org/abs/1804.03462
We study evolution and thermodynamics of a slow-roll transition between early and late time de Sitter phases, both in the homogeneous case and in the presence of a black hole, in a scalar field model with a generic potential having both a maximum and
Externí odkaz:
http://arxiv.org/abs/1707.06586
We study the problem of finding brane-like solutions to Lovelock gravity, adopting a general approach to establish conditions that a lower dimensional base metric must satisfy in order that a solution to a given Lovelock theory can be constructed in
Externí odkaz:
http://arxiv.org/abs/1706.06684
We show that asymptotically future deSitter (AFdS) spacetimes carry 'genuine' cosmic hair; information that is analogous to the mass and angular momentum of asymptotically flat spacetimes and that characterizes how an AFdS spacetime approaches its as
Externí odkaz:
http://arxiv.org/abs/1608.04641
Autor:
Kastor, David, Traschen, Jennie
Janis-Newman-Winicour (JNW) spacetimes generalize the Schwarzschild solution to include a massless scalar field. Although suffering from naked singularities, they share the `frozen star' features of Schwarzschild black holes. Cosmological versions of
Externí odkaz:
http://arxiv.org/abs/1607.08219
The first law for the holographic entanglement entropy of spheres in a boundary CFT with a bulk Lovelock dual is extended to include variations of the bulk Lovelock coupling constants. Such variations in the bulk correspond to perturbations within a
Externí odkaz:
http://arxiv.org/abs/1604.04468
Autor:
Kastor, David, Traschen, Jennie
We explore a correspondence between Melvin magnetic fluxtubes and anisotropic cosmological solutions, which we call `Melvin cosmologies'. The correspondence via analytic continuation provides useful information in both directions. Solution generating
Externí odkaz:
http://arxiv.org/abs/1507.05534