Astrophysical flows near $f(T)$ gravity black holes

TL;DR

This paper investigates the behavior of astrophysical fluid flows near black holes within $f(T)$ gravity, analyzing sonic points and accretion processes for various fluids, and comparing results with $f(R)$ gravity.

Contribution

It introduces a dynamical analysis of accretion flows near $f(T)$ gravity black holes, highlighting differences from $f(R)$ gravity and classifying flows by equation of state.

Findings

Identification of sonic points via Hamiltonian system analysis

Classification of accretion flows based on fluid equation of state

Comparison of $f(T)$ and $f(R)$ gravity effects on accretion processes

Abstract

In this paper, we study the accretion process for fluids flowing near a black hole in the context of $f(T)$ teleparallel gravity. Specifically, by performing a dynamical analysis by a Hamiltonian system, we are able to find the sonic points. After that, we consider different isothermal test fluids in order to study the accretion process when they are falling onto the black hole. We found that these flows can be classified according to the equation of state and the black hole features. Results are compared in $f(T)$ and $f(R)$ gravity.