Asymptotic decay and quasinormal frequencies of scalar and Dirac fields around dilaton-de Sitter black holes

Autor:	Alexey Dubinsky, Antonina Zinhailo
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Zdroj:	European Physical Journal C: Particles and Fields, Vol 84, Iss 8, Pp 1-11 (2024)
Druh dokumentu:	article
ISSN:	1434-6052
DOI:	10.1140/epjc/s10052-024-13206-6
Popis:	Abstract We study the decay of Dirac and massive scalar fields at asymptotically late times in the background of the charged asymptotically de Sitter dilatonic black holes. It is shown that the asymptotic decay is exponential and oscillatory for large and intermediate mass of the field, while for zero and small mass it is pure exponential without oscillations. This reflects the dominance of quasinormal modes of the empty de Sitter spacetime at asymptotically late times. We also show that the earlier WKB calculation of the massive scalar field spectrum does not allow one to find the fundamental mode with reasonable accuracy.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/76b0f14cd4914499b9817daaccaf8189 Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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