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

Abstract

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.

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 SEP 18 2018. Web of Science Citations: 5.