MG13 - Talk detail |
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Participant |
Doneva, Daniela | |||||||
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Institution |
University of Tübingen - Auf der Morgenstelle 10 - Tübingen - - Germany | |||||||
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Session |
BH3 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
A connection between quasinormal modes and nonuniqueness of charged scalar-tensor black holes | |||||
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Abstract |
We study the scalar sector of the quasinormal modes of charged general relativistic, static and spherically symmetric black holes coupled to nonlinear electrodynamics and embedded in a class of scalar-tensor theories. It turns out that for certain values of the parameters unstable modes are present. This implies the existence of scalar-tensor black holes with primary hair that bifurcate from the embedded general relativistic black-hole solutions at critical values of the parameters corresponding to the static zero-modes. We prove that such scalar-tensor black holes really exist by solving the full system of scalar-tensor field equations for the static, spherically symmetric case. The obtained branches of hairy black holes are in one to one correspondence with the bounded states of the potential governing the linear perturbations of the scalar field. The stability of the new hairy black holes is also examined. (ref. D. Doneva, S. Yazadjiev, K. Kokkotas, I. Stefanov, Phys. Rev. D82, 064030 (2010)) |
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