Massive charged scalar field in the Kerr-Newman background: Quasinormal modes, late-time tails and stability

R. A. Konoplya and A. Zhidenko
Phys. Rev. D 88, 024054 – Published 31 July 2013

Abstract

So far analysis of the quasinormal spectrum of a massive charged scalar field in the black hole background has been limited by the regime of small μM and qQ, where μ, q (M,Q) are mass and charge of the field (black hole). Here we shall present a comprehensive picture of quasinormal modes, late-time tails and stability of a massive charged scalar field around Kerr-Newman black holes for any physically meaningful values of the parameters. We shall show that despite the presence of the two mechanisms of superradiance (owing to black hole’s rotation and charge) and the massive term creating growing bound states, there is no indication of instability under the quasinormal modes’ boundary conditions. We have shown that for some moderate values of qQ dominant quasinormal modes may have arbitrarily small real oscillation frequencies Re(ω). An analytic formula for the quasinormal modes has been derived in the regime of large qQ. The larger the field’s charge, the sooner asymptotic tails dominate in a signal, making it difficult to extract quasinormal frequencies from a time-domain profile. Analytic expressions for intermediate and asymptotically late-time tails have been found for the Reissner-Nordström black hole. For the near extremal Kerr-Newman black holes we have obtained a more general picture of the mode branching found recently for massless fields [arXiv:1212.3271] in the Kerr background.

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  • Received 6 July 2013

DOI:https://doi.org/10.1103/PhysRevD.88.024054

© 2013 American Physical Society

Authors & Affiliations

R. A. Konoplya*

  • DAMTP, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, United Kingdom

A. Zhidenko

  • Centro de Matemática, Computação e Cognição, Universidade Federal do ABC (UFABC), Rua Abolição, CEP: 09210-180 Santo André, São Paulo, Brazil

  • *konoplya_roma@yahoo.com
  • olexandr.zhydenko@ufabc.edu.br

See Also

Massive charged scalar field in the Kerr-Newman background: Hawking radiation

R. A. Konoplya and A. Zhidenko
Phys. Rev. D 89, 084015 (2014)

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Vol. 88, Iss. 2 — 15 July 2013

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