Testing the no-hair theorem with the continuum-fitting and the iron line methods: a short review

Abstract

The continuum-fitting and the iron line methods are leading techniques capable of probing the spacetime geometry around astrophysical black hole candidates and testing the no-hair theorem. In the present paper, we review the two approaches, from the astrophysical models and their assumptions, to the constraining power with present and future facilities.

19 pages, 12 figures. Invited review paper for the focus issue "Hairy black holes". v2: refereed version

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