Impact of a plasma on the relaxation of black holes

Autor:	Cannizzaro, Enrico, Spieksma, Thomas F. M., Cardoso, Vitor, Ikeda, Taishi
Rok vydání:	2024
Předmět:	General Relativity and Quantum Cosmology Astrophysics - High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	Our universe is permeated with interstellar plasma, which prevents propagation of low-frequency electromagnetic waves. Here, we show that two dramatic consequences arise out of such suppression; (i) if plasma permeates the light ring of a black hole, electromagnetic modes are screened entirely from the gravitational-wave signal, changing the black hole spectroscopy paradigm; (ii) if a near vacuum cavity is formed close to a charged black hole, as expected for near equal-mass mergers, ringdown "echoes" are excited. The amplitude of such echoes decays slowly and could thus serve as a silver bullet for plasmas near charged black holes. Comment: 11 pages, 5 figures, version to appear in Physical Review D Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2405.05315 Zobrazit plný text záznamu View this record from Arxiv