New theoretical approaches to black holes

Details New theoretical approaches to black holes New theoretical approaches to black holes

2008-03-20

arxiv.org/abs/0803.2944v2

New Astron.Rev.51:791-798,2008

Astronomy and Astrophysics

Astrophysics

10 pages, 6 figures, to appear in the Proceedings of the Conference "Jean-Pierre Lasota, X-ray binaries, accretion disks and c

Scientific paper

10.1016/j.newar.2008.03.026

Quite recently, some new mathematical approaches to black holes have appeared in the literature. They do not rely on the classical concept of event horizon -- which is very global, but on the local concept of hypersurfaces foliated by trapped surfaces. After a brief introduction to these new horizons, we focus on a viscous fluid analogy that can be developed to describe their dynamics, in a fashion similar to the membrane paradigm introduced for event horizons in the seventies, but with a significant change of sign of the bulk viscosity.

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