http://arxiv.org/abs/2111.05873
From time to time, different observations suggest that Einstein’s theory of general relativity (GR) may not be the ultimate theory of gravity. Various researchers have suggested that the $f(R)$ theory of gravity is the best alternative to replace GR. Using $f(R)$ gravity, one can elucidate the various unexplained physics of compact objects, such as black holes, neutron stars, and white dwarfs. Researchers have already put effort into finding the vacuum solution around a black hole in $f(R)$ gravity. However, for a long time, they could not find an asymptotically flat vacuum solution. In this article, we show that the asymptotically flat vacuum solution of $f(R)$ gravity is possible and thereby use it to explain the spherical accretion flow around the black hole.
S. Kalita and B. Mukhopadhyay
Mon, 22 Nov 21
47/53
Comments: 6 pages including 2 figures and 1 table; based on the talk given in the parallel session “Black Holes in alternative theories of gravity” in the Sixteenth Marcel Grossmann Meeting held online during July 5-10, 2021; to appear in the proceedings of Sixteenth Marcel Grossmann Meeting