Effect of Accreting Tidally Disrupted Stars on the Spin Evolution of similar to 10(6) M-circle dot Black Holes
文献类型：期刊论文
| 作者 | Zhang, Xiaoxia1,2,3; Lu, Youjun1,2,4; Liu, Zhu1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-06-01 |
| 卷号 | 877期号:2页码:13 |
| 关键词 | accretion, accretion disks black hole physics galaxies: active galaxies: nuclei relativistic processes |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab1d48 |
| 英文摘要 | Accretion of tidally disrupted stars (TDSs) is expected to contribute significantly to the growth of massive black holes (MBHs) with mass similar to 10(6) M-circle dot in galactic centers. In this paper, we quantitatively investigate the effect of the TDS accretion on the spin evolution of these relatively small MBHs, by also considering the accretion of gas clouds with (many) chaotic episodes. We find that the accretion of TDSs can play an important role or even a dominant role in shaping the spin distribution of similar to 10(6) M-circle dot MBHs, depending on the contribution fraction (f(TDE)) of the TDS accretion to the MBH growth. If f(TDE) is as large as greater than or similar to 0.9, most similar to 10(6) M-circle dot MBHs have low spins (vertical bar a vertical bar less than or similar to 0.3); if f(TDE) is as small as less than or similar to 0.1, most similar to 10(6) M-circle dot MBHs have high spins (vertical bar a vertical bar greater than or similar to 0.7). We also find that (1) the fraction of highly spinning similar to 10(6) M-circle dot MBHs in the TDS accretion states is smaller than that in the gas-cloud (active galactic nucleus [AGN]) accretion states, which is a consequence of more rapid spin decrease during the period of consecutive TDS accretion than the spin increase during the AGN periods when the spin is large; and (2) the fraction of retrograde-spin accretion in the TDS accretion states is almost the same as that of prograde-spin accretion, while it is negligible in the gas-cloud (AGN) accretion states. The current scarce sample of AGNs (similar to 10(6) M-circle dot) with spin measurements hints at an insignificant contribution from TDS accretion to MBH growth. Future measurements on spins of similar to 10(6) M-circle dot MBHs may provide stronger constraints on the importance of both AGN and TDS accretion states in their growth history. |
| WOS关键词 | ACTIVE GALACTIC NUCLEI ; LUMINOSITY FUNCTION ; ANGULAR-MOMENTUM ; MASS ; DISK ; LINE ; CONSTRAINTS ; RATES ; REVERBERATION ; PRECESSION |
| 资助项目 | National Key Program for Science and Technology Research and Development[2016YFA0400704] ; National Natural Science Foundation of China[11873056] ; National Natural Science Foundation of China[11690024] ; National Natural Science Foundation of China[11390372] ; Strategic Priority Program of the Chinese Academy of Sciences[XDB 23040100] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000470807700004 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Program of the Chinese Academy of Sciences ; Strategic Priority Program of the Chinese Academy of Sciences ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Program of the Chinese Academy of Sciences ; Strategic Priority Program of the Chinese Academy of Sciences ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Program of the Chinese Academy of Sciences ; Strategic Priority Program of the Chinese Academy of Sciences ; National Key Program for Science and Technology Research and Development ; National Key Program for Science and Technology Research and Development ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Program of the Chinese Academy of Sciences ; Strategic Priority Program of the Chinese Academy of Sciences |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/26424]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Lu, Youjun |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ China, CAS Key Lab Computat Astrophys, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xiaoxia,Lu, Youjun,Liu, Zhu. Effect of Accreting Tidally Disrupted Stars on the Spin Evolution of similar to 10(6) M-circle dot Black Holes[J]. ASTROPHYSICAL JOURNAL,2019,877(2):13. |
| APA | Zhang, Xiaoxia,Lu, Youjun,&Liu, Zhu.(2019).Effect of Accreting Tidally Disrupted Stars on the Spin Evolution of similar to 10(6) M-circle dot Black Holes.ASTROPHYSICAL JOURNAL,877(2),13. |
| MLA | Zhang, Xiaoxia,et al."Effect of Accreting Tidally Disrupted Stars on the Spin Evolution of similar to 10(6) M-circle dot Black Holes".ASTROPHYSICAL JOURNAL 877.2(2019):13. |
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来源：国家天文台
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