10-12 January 2018
Centre for Particle Theory, Durham
Europe/London timezone

Scalar hairy black holes in four dimensions are unstable

11 Jan 2018, 16:30
20m
Centre for Particle Theory, Durham

Centre for Particle Theory, Durham

IPPP & Dept. Mathematical Sciences Durham University South Road Durham DH1 3LE

Speaker

Mr Bogdan Ganchev (University of Cambridge)

Description

We present a numerical analysis of the stability properties of the black holes with scalar hair constructed by Herdeiro and Radu. We prove the existence of a novel gauge where the scalar field perturbations decouple from the metric perturbations, and analyse the resulting quasinormal mode spectrum. We find unstable modes with characteristic growth rates which for uniformly small hair are almost identical to those of a massive scalar field on a fixed Kerr background, whereas for larger amplitudes of the scalar cloud can be up to a few times larger than in Kerr.
What would be the preferred length of your talk? 20 minutes + questions

Primary author

Mr Bogdan Ganchev (University of Cambridge)

Co-author

Dr Jorge E. Santos (University of Cambridge)

Presentation Materials

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