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Black holes: scattering, superradiance and stability

Grant number: 16/00384-1
Support type:Scholarships in Brazil - Master
Effective date (Start): May 01, 2016
Effective date (End): August 31, 2018
Field of knowledge:Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
Principal researcher:Maurício Richartz
Grantee:Thiago Assumpção
Home Institution: Centro de Matemática, Computação e Cognição (CMCC). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
Associated research grant:13/09357-9 - Physics and geometry of spacetime, AP.TEM
Associated scholarship(s):17/10641-4 - Superradiance and stability in non-axisymmetric systems, BE.EP.MS


The black hole uniqueness theorems state that general relativistic black holes are characterized by only three parameters: its mass M, its charge Q and its angular momentum J. Recently, however, Herdeiro and Radu have demonstrated, numerically, the existence of black holes with scalar hair and (possibly) astrophysical relevance if some of the hypothesis of these theorems are relaxed. This work was motivated by the linear analysis of Hod concerning the existence of scalar clouds around Kerr black holes, and is related to phenomenon of superradiance. In view of that, we propose a detailed and systematic study of wave scattering by black holes. In particular, the student will analyse the phenomena of superradiance, scalar clouds and quasinormal modes of black holes. A stability analysis of black holes with scalar hair and the calculation of its quasinormal modes are among the objectives of this project.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ASSUMPCAO, THIAGO; CARDOSO, VITOR; ISHIBASHI, AKIHIRO; RICHARTZ, MAURICIO; ZILHAO, MIGUEL. Black hole binaries: Ergoregions, photon surfaces, wave scattering, and quasinormal modes. Physical Review D, v. 98, n. 6, . (17/10641-4, 13/09357-9, 16/00384-1)

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