Regular phantom black holes

Details Regular phantom black holes Regular phantom black holes

2005-11-18

arxiv.org/abs/gr-qc/0511109v1

Phys.Rev.Lett. 96 (2006) 251101

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

revtex4, 4 pages, no figures

Scientific paper

10.1103/PhysRevLett.96.251101

For self-gravitating, static, spherically symmetric, minimally coupled scalar fields with arbitrary potentials and negative kinetic energy (favored by the cosmological observations), we give a classification of possible regular solutions to the field equations with flat, de Sitter and AdS asymptotic behavior. Among the 16 presented classes of regular rsolutions are traversable wormholes, Kantowski-Sachs (KS) cosmologies beginning and ending with de Sitter stages, and asymptotically flat black holes (BHs). The Penrose diagram of a regular BH is Schwarzschild-like, but the singularity at $r=0$ is replaced by a de Sitter infinity, which gives a hypothetic BH explorer a chance to survive. Such solutions also lead to the idea that our Universe could be created from a phantom-dominated collapse in another universe, with KS expansion and isotropization after crossing the horizon. Explicit examples of regular solutions are built and discussed. Possible generalizations include $k$-essence type scalar fields (with a potential) and scalar-tensor theories of gravity.

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