ON THE BLACK HOLE MASS-X-RAY EXCESS VARIANCE SCALING RELATION FOR ACTIVE GALACTIC NUCLEI IN THE LOW-MASS REGIME
文献类型：期刊论文
| 作者 | Pan, Hai-Wu1,2; Yuan, Weimin1 ; Zhou, Xin-Lin1; Dong, Xiao-Bo3; Liu, Bifang1
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2015-08-01 |
| 卷号 | 808期号:2 |
| 关键词 | galaxies: active galaxies: nuclei X-rays: galaxies |
| 英文摘要 | Recent studies of active galactic nuclei (AGNs) found a statistically inverse linear scaling between the X-ray normalized excess variance sigma(2)(rms) (variability amplitude) and the black hole (BH) mass spanning over M-BH = 10(6)-10(9) M-circle dot. Suggested as having a small scatter, this scaling relation may provide a novel method to estimate the BH mass of AGNs. However, a question arises as to whether this relation can be extended to the low-mass regime below similar to 10(6) M-circle dot. If confirmed, it would provide an efficient tool to search for AGNs with low-mass BHs using X-ray variability. This paper presents a study of the X-ray excess variances for a sample of AGNs with BH masses in the range of 10(5)-10(6)M(circle dot) observed with XMM-Newton and ROSAT, including data both from the archives and from newly preformed observations. It is found that the relation is no longer a simple extrapolation of the linear scaling; instead, the relation starts to flatten at similar to 10(6) M-circle dot toward lower masses. Our result is consistent with the recent finding of Ludlam et al. Such a flattening of the M-BH-sigma(2)(rms) relation is actually expected from the shape of the power spectrum density of AGNs, for which the break frequency is inversely scaled with the mass of BHs. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000371002400058 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5446]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, 20A Datun Rd, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Yunnan Observ, Kunming, Yunnan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pan, Hai-Wu,Yuan, Weimin,Zhou, Xin-Lin,et al. ON THE BLACK HOLE MASS-X-RAY EXCESS VARIANCE SCALING RELATION FOR ACTIVE GALACTIC NUCLEI IN THE LOW-MASS REGIME[J]. ASTROPHYSICAL JOURNAL,2015,808(2). |
| APA | Pan, Hai-Wu,Yuan, Weimin,Zhou, Xin-Lin,Dong, Xiao-Bo,&Liu, Bifang.(2015).ON THE BLACK HOLE MASS-X-RAY EXCESS VARIANCE SCALING RELATION FOR ACTIVE GALACTIC NUCLEI IN THE LOW-MASS REGIME.ASTROPHYSICAL JOURNAL,808(2). |
| MLA | Pan, Hai-Wu,et al."ON THE BLACK HOLE MASS-X-RAY EXCESS VARIANCE SCALING RELATION FOR ACTIVE GALACTIC NUCLEI IN THE LOW-MASS REGIME".ASTROPHYSICAL JOURNAL 808.2(2015). |
入库方式： OAI收割
来源：国家天文台
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