Astrophysical flows near $f(T)$ gravity black holes
  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. 
Ayyesha K. Ahmed, Mustapha Azreg-A\"inou (C. Author), Sebastian   Bahamonde, Salvatore Capozziello, and Mubasher Jamil
gr-qc astro-ph.GA