A parametrization to test black hole candidates with the spectrum of thin disks

作者：Lin, Nan^*; Tsukamoto, Naoki; Ghasemi-Nodehi, M.; Bambi, Cosimo

来源：European Physical Journal C, 2015, 75(12): 599.

DOI：10.1140/epjc/s10052-015-3837-3

• ACCRETION DISKS
• GEOMETRY
• MASS
• CONSTRAINTS
• SPACETIMES
• EMISSION
• SCALAR
• MODEL
• SPIN
• X-1

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.

• 出版日期2015-12-17
• 单位复旦大学