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

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.

preprint2012arXivOpen access
F. H. VincentE. GourgoulhonO. StraubM. AbramowiczJ. NovakT. PaumardG. Perrin
astro-ph.HEgr-qc
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F. H. VincentE. GourgoulhonO. StraubM. AbramowiczJ. NovakT. PaumardG. Perrin

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