The effect of accretion environment at large radius on hot accretion flows

doi:10.1093/mnras/sty052

CORC > 上海天文台 > 中国科学院上海天文台

	The effect of accretion environment at large radius on hot accretion flows
	Yang, Xiao-Hong 2; Bu, De-Fu 1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2018-05-01
卷号	476 期号:1 页码:954-960
关键词	Accretion, Accretion Discs Black Hole Physics Hydrodynamics
ISSN号	0035-8711
DOI	10.1093/mnras/sty052
英文摘要	We study the effects of accretion environment (gas density, temperature, and angular momentum) at large radii (similar to 10 pc) on luminosity of hot accretion flows. The radiative feedback effects from the accretion flow on the accretion environment are also self-consistently taken into account. We find that the slowly rotating flows at large radii can significantly deviate from Bondi accretion when radiation heating and cooling are considered. We further find that when the temperature of environment gas is low (e.g. T = 2 x 10(7) K), the luminosity of hot accretion flows is high. When the temperature of gas is high (e.g. T >= 4 x 10(7) K), the luminosity of hot accretion flow significantly deceases. The environment gas density can also significantly influence the luminosity of accretion flows. When density is higher than similar to 4 x 10(-22) g cm(-3) and temperature is lower than 2 x 10(7) K, hot accretion flow with luminosity lower than 2 per cent L-Edd is not present. Therefore, the parsec-scale environment density and temperature are two important parameters to determine the luminosity. The results are also useful for the subgrid models adopted by the cosmological simulations.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000429276700075
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32497]
专题	中国科学院上海天文台
通讯作者	Yang, Xiao-Hong
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China
推荐引用方式 GB/T 7714	Yang, Xiao-Hong,Bu, De-Fu. The effect of accretion environment at large radius on hot accretion flows[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,476(1):954-960.
APA	Yang, Xiao-Hong,&Bu, De-Fu.(2018).The effect of accretion environment at large radius on hot accretion flows.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,476(1),954-960.
MLA	Yang, Xiao-Hong,et al."The effect of accretion environment at large radius on hot accretion flows".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 476.1(2018):954-960.