A limit relation between black hole mass and H beta width: Testing super-Eddington accretion in active galactic nuclei
文献类型：期刊论文
| 作者 | Wang JM(王建民) ; Wang, JM
|
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2003 |
| 卷号 | 125期号:6页码:2859-2864 |
| 关键词 | cosmology : miscellaneous galaxies : active |
| 通讯作者 | Univ Tubingen, Inst Astron & Astrophys, Abt Astron, D-72076 Tubingen, Germany ; Chinese Acad Sci, Inst High Energy Phys, High Energy Astrophys Lab, Beijing 100039, Peoples R China |
| 英文摘要 | We show that there is a limit relation between the black hole mass (M-BH) and the width at half-maximum (v(FWHM)) of Hbeta for active galactic nuclei (AGNs) with super-Eddington accretion rates. When a black hole has a super-Eddington accretion rate, the empirical relation derived from reverberation mapping can be applied in two possible ways. First, it reduces to a relation between the black hole mass and the size of the broad-line region because of photon-trapping effects inside the accretion disk. For the empirical reverberation relation of Kaspi et al., we obtain the limit relation M-BH=(2.9-12.6)x10(6) [v(FWHM)/(10(3) km s(-1))](6.67) M-circle dot, called the Eddington limit. Second, the Eddington limit luminosity will be relaxed if the trapped photons can escape from the magnetized super-Eddington accretion disk via the photon bubble instability, and the size of the broad-line region will be enlarged according to the empirical reverberation relation, leading to a relatively narrow Hbeta width. We call this the Begelman limit. Using this limit relation, we searched 164 AGNs for super-Eddington accretion. We find that most of them are well confined by the Eddington limit relation that is, most have sub-Eddington accretion rates-but there are a handful of objects located between the Eddington and Begelman limit lines; they may be candidate super-Eddington accretors in a hybrid structure of photon trapping and photon bubble instability. The maximum Hbeta width is in the range (3.0-3.8)x10(3) km s(-1) for the most massive black holes with super-Eddington accretion rates among AGNs. We suggest that the FWHM(Hbeta)-M-BH relation is a reliable and convenient method to test whether a source is super-Eddington and useful to probe the structure of the super-Eddington accretion process. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000183234100007 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/239832]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang JM,Wang, JM. A limit relation between black hole mass and H beta width: Testing super-Eddington accretion in active galactic nuclei[J]. ASTRONOMICAL JOURNAL,2003,125(6):2859-2864. |
| APA | 王建民,&Wang, JM.(2003).A limit relation between black hole mass and H beta width: Testing super-Eddington accretion in active galactic nuclei.ASTRONOMICAL JOURNAL,125(6),2859-2864. |
| MLA | 王建民,et al."A limit relation between black hole mass and H beta width: Testing super-Eddington accretion in active galactic nuclei".ASTRONOMICAL JOURNAL 125.6(2003):2859-2864. |
入库方式： OAI收割
来源：高能物理研究所
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