7,983 research outputs found
Black holes and fundamental physics
We give a review of classical, thermodynamic and quantum properties of black
holes relevant to fundamental physics.Comment: Invited talk at the Fifth International Workshop on New Worlds in
Astroparticle Physics, University of the Algarve, Faro, Portugal, January
8-10, 2005, published in the Proceedings of the Fifth International Workshop
on New Worlds in Astroparticle Physics, World Scientific (2006), eds. Ana M.
Mour\~ao et al., p. 71-9
General relativity, differential geometry, and unitary theories in the work of Mira Fernandes
An analysis of the work of Mira Fernandes on unitary theories is presented.Comment: 3 page
Thermodynamics of toroidal black holes
The thermodynamical properties of toroidal black holes in the grand canonical
ensemble are investigated using York's formalism. The black hole is enclosed in
a cavity with finite radius where the temperature and electrostatic potential
are fixed. The boundary conditions allow one to compute the relevant
thermodynamical quantities, e.g. thermal energy, entropy and specific heat.
This black hole is thermodynamically stable and dominates the grand partition
function. This means that there is no phase transition, as the one encountered
for spherical black holes.Comment: 11 pages, 2 eps figures, revte
Stationary Black Holes in a Generalized Three-Dimensional Theory of Gravity
We consider a generalized three-dimensional theory of gravity which is
specified by two fields, the graviton and the dilaton, and one parameter. This
theory contains, as particular cases, three-dimensional General Relativity and
three-dimensional String Theory. Stationary black hole solutions are generated
from the static ones using a simple coordinate transformation. The stationary
black holes solutions thus obtained are locally equivalent to the corresponding
static ones, but globally distinct. The mass and angular momentum of the
stationary black hole solutions are computed using an extension of the Regge
and Teitelboim formalism. The causal structure of the black holes is described.Comment: 12 pages, Late
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