English

Regular nonminimal magnetic black holes in spacetimes with a cosmological constant

General Relativity and Quantum Cosmology 2016-01-11 v2 High Energy Physics - Theory

Abstract

We consider new regular exact spherically symmetric solutions of a nonminimal Einstein--Yang-Mills theory with a cosmological constant and a gauge field of magnetic Wu-Yang type. The most interesting solutions found are black holes with metric and curvature invariants that are regular everywhere, i.e., regular black holes. We set up a classification of the solutions according to the number and type of horizons. The structure of these regular black holes is characterized by four specific features: a small cavity in the neighborhood of the center, a repulsion barrier off the small cavity, a distant equilibrium point, in which the metric function has a minimum, and a region of Newtonian attraction. Depending on the sign and value of the cosmological constant the solutions are asymptotically de Sitter (dS), asymptotically flat, or asymptotically anti-de Sitter (AdS).

Keywords

Cite

@article{arxiv.1512.02653,
  title  = {Regular nonminimal magnetic black holes in spacetimes with a cosmological constant},
  author = {Alexander B. Balakin and José P. S. Lemos and Alexei E. Zayats},
  journal= {arXiv preprint arXiv:1512.02653},
  year   = {2016}
}

Comments

14 pages, 4 figures