IAR 05382
INSTITUTO ARGENTINO DE RADIOASTRONOMIA
Unidad Ejecutora - UE
artículos
Título:
Gravitational entropy of Kerr black holes
Autor/es:
PÉREZ, D.; ROMERO. G. E.
Revista:
GENERAL RELATIVITY AND GRAVITATION
Editorial:
SPRINGER/PLENUM PUBLISHERS
Referencias:
Lugar: New York; Año: 2014 vol. 46
ISSN:
0001-7701
Resumen:
Classical invariants of General Relativity can be used to approximate the entropy of the gravitational field. In this work, we study two proposed estimators based on scalars constructed out from the Weyl tensor, in Kerr spacetime. In order to evaluate Clifton, Ellis and Tavakol´s proposal, we calculate the gravitational energy density, gravitational temperature, and gravitational entropy of the Kerr spacetime. We find that in the frame we consider, Clifton et al.´s estimator does not reproduce the Bekenstein-Hawking entropy of a Kerr black hole. The results are compared with previous estimates obtained by the authors using the Rudjord-Gr arnothingn-Hervik approach. We conclude that the latter represents better the expected behaviour of the gravitational entropy of black holes.
