The effect of accretion environment at large radius on hot accretion flows
文献类型：期刊论文
| 作者 | Yang, Xiao-Hong2; Bu, De-Fu1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000429276700075 |
| 出版者 | OXFORD UNIV PRESS |
| 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. |
入库方式： OAI收割
来源：上海天文台
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