Thin accretion disks around a black hole in Einstein-Aether-scalar theory

Autor:	Tong-Yu He, Ziqiang Cai, Rong-Jia Yang
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Zdroj:	European Physical Journal C: Particles and Fields, Vol 82, Iss 11, Pp 1-7 (2022)
Druh dokumentu:	article
ISSN:	1434-6052
DOI:	10.1140/epjc/s10052-022-11037-x
Popis:	Abstract We consider the accretion process in the thin disk around a supermassive black hole in Einstein-aether-scalar theory. We probe the effects of the model parameter on the physical properties of the disk. The results show that with increasing value of the parameter, the energy flux, the radiation temperature, the spectra cut-off frequency, the spectra luminosity, and the conversion efficiency of the disk decrease. The disk is hotter and more luminous than that in general relativity for negative parameter, while it is cooler and less luminous for positive parameter. We also find some values of the parameter allowed by the theory are excluded by the physical properties of the disk.
Databáze:	Directory of Open Access Journals
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