Speaker
Description
Disc structures around black holes are of great importance in astrophysics. The usual simplification of most accreting models is neglecting the disc's self-gravitation. However, in many situations, numerous disc properties may be highly sensitive to the gravitational field. We present a full metric describing the field of a thin disc and a Schwarzschild black hole. The disc density profiles are astrophysically realistic, stretching from the horizon to radial infinity, yet falling off quickly at both these locations. The main advantages of the solution are that (i) the discs have no edges, so their fields are everywhere regular (outside the horizon), and that (ii) both non-trivial metric functions are provided analytically and in closed forms. We examine and illustrate the basic properties of the black-hole—disc space-times.
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