https://doi.org/10.1140/epjc/s10052-015-3837-3
Regular Article - Theoretical Physics
A parametrization to test black hole candidates with the spectrum of thin disks
1
Department of Physics, Center for Field Theory and Particle Physics, Fudan University, Shanghai, 200433, China
2
Theoretical Astrophysics, Eberhard-Karls Universität Tübingen, 72076, Tübingen, Germany
* e-mail: bambi@fudan.edu.cn
Received:
19
October
2015
Accepted:
6
December
2015
Published online:
17
December
2015
We discuss a parametrization to describe possible deviations from the Kerr metric and test astrophysical black hole candidates with electromagnetic radiation. Our metric is a very simple generalization of the Kerr solution with two main properties: (1) the phenomenology is quite rich and, for example, it can describe black holes with high Novikov–Thorne radiative efficiency or black holes of very small size; (2) it is suitable for the numerical calculations required to study the spectrum of thin disks. The latter point is our principal motivation to study such a kind of parametrization, because in the analysis of real data there are usually several parameters to fit and the problem with current non-Kerr metrics is that the calculation times are too long.
© The Author(s), 2015
