http://arxiv.org/abs/1603.03692
We review some properties of black hole structures appearing in gravity with a massless scalar field, with both minimal and nonminimal coupling. The main properties of the resulting cold black holes are described. The study of black holes in scalar-gravity systems is extended to $k$-essence theories, and some examples are explicitly worked out. In these cases, even while the existence of horizons is possible, the metric regularity requirement on the horizon implies either a cold black type structure or a singular behavior of the scalar field.
K. Bronnikov, J. Fabris and D. Rodrigues
Mon, 14 Mar 16
34/47
Comments: Latex file, 13 pages. To appear in the IJMPD in the special issue dedicated to the “III Amazonian Symposium on Physics”, occurred from 28th september to 2nd october 2015, Bel\’em, Par\’a, Brazil