Dilaton minimally coupled to 2 + 1 Einstein Maxwell fields; stationary cyclic symmetric black holes

TL;DR

This paper derives and analyzes a family of stationary cyclic symmetric black hole solutions in 2+1 Einstein-Maxwell-dilaton gravity, exploring their properties and conserved quantities.

Contribution

It provides the first explicit derivation of charged dilaton black hole solutions in 2+1 dimensions with a detailed characterization of their physical properties.

Findings

Solutions depend on five parameters including charge and mass.

Solutions do not exhibit de Sitter or Anti-de Sitter behavior at infinity.

Explicit algebraic structures of fields and tensors are provided.

Abstract

Using the Schwarzschild coordinate frame for a static cyclic symmetric metric in 2 + 1 Einstein gravity coupled to a electric Maxwell field and a dilaton logarithmically depending on the radial coordinate in the presence of an exponential potential the general solution of the Einstein Maxwell dilaton equations is derived and it is identified with the Chan Mann charged dilaton solution. Via a general SL(2;R) transformation, applied on the obtained charged dilaton metric, a family of stationary dilaton solutions has been generated; these solutions possess five parameters: dilaton and cosmological constants , charge, momentum, and mass for some values of them. All the exhibited solutions have been characterized by their quasi-local energy, mass, and momentum through their series expansions at spatial infinity. The structural functions determining these solutions increase as the radial coordinate does, hence they do not exhibit an dS AdS behavior at infinity Moreover, the algebraic structure of the Maxwell field, energy-momentum, and Cotton tensors is given explicitly.