Note on a new parametrization for testing the Kerr metric

The European Physical Journal C

M. Ghasemi-Nodehi¹  Cosimo Bambi² 

[1] Department of Physics, Center for Field Theory and Particle Physics, Fudan University, 200433, Shanghai, China;Department of Physics, Center for Field Theory and Particle Physics, Fudan University, 200433, Shanghai, China;Theoretical Astrophysics, Eberhard-Karls Universität Tübingen, 72076, Tübingen, Germany;

关键词: Black Hole;    Deformation Parameter;    Very Long Baseline Interferometry;    Spacetime Geometry;    Distant Observer;   

DOI  :  10.1140/epjc/s10052-016-4137-2

来源: Springer

【 摘 要 】

We propose a new parametrization for testing the Kerr nature of astrophysical black hole candidates. The common approaches focus on the attempt to constrain possible deviations from the Kerr solution described by new terms in the metric. Here we adopt a different perspective. The mass and the spin of a black hole make the spacetime curved and we want to check whether they do it with the strength predicted by general relativity. As an example, we apply our parametrization to the black hole shadow, an observation that may be possible in a not too distant future.

【 授权许可】

CC BY