Talk detail

Participant	Macedo, Caio
Institution	CENTRA - Instituto Superior Técnico - Av. Rovisco Pais, 1 - Lisboa - Lisboa - Portugal

Session	AT3	Accepted	Yes	Order	11	Time	17:50 - 18:10	15' + 5'
Talk	Oral abstract	Title	Slowly rotating black holes in alternative theories of gravity
Co-authors	Paolo Pani, Vitor Cardoso, Luís C. B. Crispino
Abstract	We present, in closed analytic form, a general stationary, slowly rotating black hole, which is a solution to a large class of alternative theories of gravity in four dimensions. In these theories, the Einstein-Hilbert action is supplemented by all possible quadratic, algebraic curvature invariants coupled to a scalar field. The solution is found as a deformation of the Schwarzschild metric in general relativity. We explicitly derive the changes to the orbital frequency at the innermost stable circular orbit and at the light ring in closed form. These results could be useful when comparing general relativity against alternative theories by (say) measurements of x-ray emission in accretion disks, or by stellar motion around supermassive black holes.