Spherical accretion of matter by charged black holes on f ( T ) $f(T)$ Gravity

Abstract

We studied the spherical accretion of matter by charged black holes on f (T ) Gravity. Considering the accretion model of a isentropic perfect fluid we obtain the general form of the Hamiltonian and the dynamic system for the fluid. We have analysed the movements of an isothermal fluid model with p = ωe and where p is the pressure and e the total energy density. The analysis of the cases shows the possibility of spherical accretion of fluid by black holes, revealing new phenomena as cyclical movement inside the event horizon.

Deflection angle and lensing signature of covariant f(T) gravity

“…However, one can alternatively start from the equivalent formulation of gravity in terms of torsion, namely the Teleparallel Equivalent of General Relativity (TEGR) [6][7][8], and extend the corresponding Lagrangian, namely the torsion scalar T , in various ways, resulting in f (T ) gravity [9][10][11], in f (T, T G ) gravity [12,13], f (T, B) gravity [14][15][16], scalartorsion theories [17][18][19], etc. Torsional gravity, and in particular f (T ) theory, has been shown to lead to interesting behavior, both in cosmological applications , as well as in the case of spherically symmetric solutions [46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64].…”