Dilaton gravity, charged dust, and (quasi-) black holes

Abstract

We consider Einstein-Maxwell-dilaton gravity with charged dust and interaction of the form $P(\chi )F_{\mu \nu }{F}^{\mu \nu }$, where $P(\chi )$ is an arbitrary function of the dilaton field $\chi$ that can be normal or phantom. For any regular $P(\chi )$, static configurations are possible with arbitrary functions $g_{00}=\exp (2\gamma (x^i))$ ($i=1,2,3$) and $\chi =\chi (\gamma )$, without any assumption of spatial symmetry. The classical Majumdar-Papapetrou system is restored by putting $\chi =$ const. Among possible solutions are black-hole (BH) and quasi-black-hole (QBH) ones. Some general results on BH and QBH properties are deduced and confirmed by examples. It is found, in particular, that asymptotically flat BHs and QBHs can exist with positive energy densities of matter and both scalar and electromagnetic fields.

revtex4, 4 pages, 1 figure of 3 parts. A brief presentation of main results (not all) of arXiv:1312.4891

References in corpus (4)

• Phantom Black Holes in Einstein-Maxwell-Dilaton Theory
• Phantom Black Holes and Sigma Models
• Quasi-black holes: definition and general properties
• Entropy of extremal black holes from entropy of quasiblack holes

Cited by in corpus (3)

• Thermodynamics and Optical Properties of Phantom AdS Black Holes in Massive Gravity
• Topological Mod(A)Max AdS black holes
• Thermodynamics, Phase Transitions, and Geodesic Structure of F(R)-Phantom Banados-Teitelboim-Zanelli (BTZ) Black Holes