1209.0251 (F. H. Vincent et al.)

Constraining the nature of the Galactic center black hole Sgr A* with
present and future observations    [PDF]

F. H. Vincent, E. Gourgoulhon, O. Straub, M. Abramowicz, J. Novak, T. Paumard, G. Perrin

The Galactic center is an ideal laboratory to study strong-field general relativistic phenomena, as the supermassive black hole Sgr A* has the biggest angular Schwarzschild radius among all black holes. This article presents three different ways of using the immediate surroundings of Sgr A* as a probe in order to either constrain its spin, or even test the very nature of this compact object.

View original: http://arxiv.org/abs/1209.0251