# Kerr-Newman-dS/AdS solution and anti-evaporation in higher-order torsion scalar gravity theories

## Document Type

Article

## Publication Date

3-1-2016

## Abstract

© 2016, Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg. We derive a null tetrad from axially-symmetric vierbein field. The (Formula presented.) -Maxwell field equations with cosmological constant, where T is the scalar torsion, are applied to the null tetrad. An exact non-vacuum solution having three constants of integration is derived which is a solution to the f (T) -Maxwell field equations provided that (Formula presented.) and (Formula presented.) , where (Formula presented.) is a constant. The scalar torsion related to this solution is constant, i.e., (Formula presented.) , and differs from the classical general relativity when (Formula presented.). We study the singularities of this solution using curvature and torsion invariants. We consider a slow rotation and show that the derived solution behaves asymptotically as de Sitter spacetime and display the existence of Nariai spacetime as a background solution. We assume a perturbation of Nariai spacetime till the first order and investigate the behavior of the black hole horizon. Finally, we explain that the anti-evaporation occurs on the classical level in the f (T) gravitational theories.

## Recommended Citation

Nashed, Gamal G.L., "Kerr-Newman-dS/AdS solution and anti-evaporation in higher-order torsion scalar gravity theories" (2016). *Centre for Theoretical Physics*. 80.

https://buescholar.bue.edu.eg/centre_theoretical_physics/80