Exact asymptotically flat charged hairy black holes with a dilaton potential
Anabalon
A
author
Astefanesei
D
author
Mann
R
author
2013
English
We find broad classes of exact 4-dimensional asymptotically flat black hole solutions in Einstein-Maxwell theories with a non-minimally coupled dilaton and its non-trivial potential. We consider a few interesting limits, in particular, a regular generalization of the dilatonic Reissner-Nordstrom solution and, also, smooth deformations of supersymmetric black holes. Further examples are provided for more general dilaton potentials. We discuss the thermodynamical properties and show that the first law is satisfied. In the non-extremal case the entropy depends, as expected, on the asymptotic value of the dilaton. In the extremal limit, the entropy is determined purely in terms of charges and is independent of the asymptotic value of the dilaton. The attractor mechanism can be used as a criterion for the existence of the regular solutions. Since there is a 'competition' between the effective potential and dilaton potential, we also obtain regular extremal black hole solutions with just one U(1) gauge field turned on.
Classical Theories of Gravity
Black Holes
WOS:000326296600001
exported from refbase (show.php?record=324), last updated on Mon, 23 Dec 2013 17:20:53 -0300
text
files/314_Anabalon_etal2013.pdf
10.1007/JHEP10(2013)184
Anabalon_etal2013
Journal Of High Energy Physics
J. High Energy Phys.
2013
Springer
continuing
periodical
academic journal
10
22 pp
1029-8479