Regular black hole solution in PFDM environment to explain the radiative efficiency of black hole candidates

Abstract

This work is the continuation of our preceding work where we have shown that regular Bardeen black hole surrounded by perfect fluid dark matter (PFDM) can be an alternative solution to explain the radiative efficiency of the astronomical source A0620-00. Here we expand the number of X-ray sources containing black hole candidates with GROJ1655-40, XTEJ1550-564, H1743-322, and GRS1124-683. The black hole solution explored contains in addition to the total mass M two spacetime parameters as the magnetic charge of a black hole and parameter that describes the properties of dark matter around a black hole. It is observed that combination of these two additional spacetime parameters can be very efficient to interpret the observational radiative efficiency of most astronomical sources studied.