Supermassive black holes with high accretion rates in active galactic nuclei. iv. h beta time lags and implications for super-eddington accretion
文献类型：期刊论文
| 作者 | Du, Pu1; Hu, Chen1; Lu, Kai-Xing1,2; Huang, Ying-Ke1; Cheng, Cheng3; Qiu, Jie1; Li, Yan-Rong1; Zhang, Yang-Wei4; Fan, Xu-Liang4; Bai, Jin-Ming4 |
| 刊名 | Astrophysical journal
 |
| 出版日期 | 2015-06-10 |
| 卷号 | 806期号:1页码:25 |
| 关键词 | Accretion, accretion disks Black hole physics Galaxies: active Quasars: supermassive black holes |
| ISSN号 | 0004-637X |
| DOI | 10.1088/0004-637x/806/1/22 |
| 英文摘要 | We have completed two years of photometric and spectroscopic monitoring of a large number of active galactic nuclei (agns) with very high accretion rates. in this paper, we report on the result of the second phase of the campaign, during 2013-2014, and the measurements of five new h beta time lags out of eight monitored agns. all five objects were identified as super-eddington accreting massive black holes (seambhs). the highest measured accretion rates for the objects in this campaign are (m) over dot(center dot) greater than or similar to 200, (m) over dot(center dot) = m over dot(center dot)/l(edd)c(-2), (m) over dot(center dot) is the mass accretion rates, l-edd is the eddington luminosity and c is the speed of light. we find that the h beta time lags in seambhs are significantly shorter than those measured in sub-eddington agns, and the deviations increase with increasing accretion rates. thus, the relationship between broad-line region size (r-h beta) and optical luminosity at 5100 angstrom, r-h beta-l-5100, requires accretion rate as an additional parameter. we propose that much of the effect may be due to the strong anisotropy of the emitted slim-disk radiation. scaling r-h beta by the gravitational radius of the black hole (bh), we define a new radius-mass parameter (y) and show that it saturates at a critical accretion rate of (m) over dot(c) = 6 similar to 30, indicating a transition from thin to slim accretion disk and a saturated luminosity of the slim disks. the parameter y is a very useful probe for understanding the various types of accretion onto massive bhs. we briefly comment on implications to the general population of super-eddington agns in the universe and applications to cosmology. |
| 语种 | 英语 |
| WOS记录号 | WOS:000356810300022 |
| 出版者 | IOP PUBLISHING LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/1639618 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Wang, Jian-Min |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ China, Beijing 100020, Peoples R China 4.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China 5.Nanjing Normal Univ, Dept Phys, Nanjing 210097, Jiangsu, Peoples R China 6.Univ Sci & Technol China, Dept Astron, Hefei 230026, Peoples R China 7.Tel Aviv Univ, Sch Phys & Astron, Wise Observ, IL-69978 Tel Aviv, Israel 8.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 9.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du, Pu,Hu, Chen,Lu, Kai-Xing,et al. Supermassive black holes with high accretion rates in active galactic nuclei. iv. h beta time lags and implications for super-eddington accretion[J]. Astrophysical journal,2015,806(1):25. |
| APA | Du, Pu.,Hu, Chen.,Lu, Kai-Xing.,Huang, Ying-Ke.,Cheng, Cheng.,...&Wang, Jian-Min.(2015).Supermassive black holes with high accretion rates in active galactic nuclei. iv. h beta time lags and implications for super-eddington accretion.Astrophysical journal,806(1),25. |
| MLA | Du, Pu,et al."Supermassive black holes with high accretion rates in active galactic nuclei. iv. h beta time lags and implications for super-eddington accretion".Astrophysical journal 806.1(2015):25. |
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