Quasars with highly accreting black holes: their X-ray properties and modified prescription of single-epoch mass
文献类型：期刊论文
| 作者 | Maithil, Jaya; Brotherton, Michael; Shemmer, Ohad; Du, Pu ; Wang, Jian-Min; Luo, Bin; Gallagher, Sarah; Chen, Hu; Li, Yan-Rong; Myers, Adam
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| 刊名 | American Astronomical Society Meeting Abstracts
 |
| 出版日期 | 2022 |
| 卷号 | 54期号:6页码:316.02D |
| 文献子类 | Article |
| 英文摘要 | The mass and accretion rate is essential to quantify the growth of the black holes, their evolution, and their impact on the host galaxies. Recent reverberation-mapped active galactic nuclei (AGNs) show that the highest accretion rate objects have a systematic smaller broad-line region (BLR) radius, 3-8 times smaller than predicted by traditional radius-luminosity (R-L) relationships. I examined the X-ray and optical-UV (OUV) properties of a dozen super-Eddington accreting black holes (SEAMBHs) that show extreme deviation from the canonical R-L relationship. Their X-ray properties may be diagnostic of structural changes in their accretion disks that may explain such behavior. I will present new Chandra X-ray and follow-up OUV observations of these SEAMBHs. They indeed have a steep hard X-ray photon index, Γ, and demonstrate a steeper power-law slope, αox, and these properties correlate with accretion rate. As highly accreting AGNs have a smaller BLR radius than previously realized, they need modified prescriptions for single-epoch virial black hole mass estimates. A new R-L relationship by Du & Wang (2019) corrects for accretion rate biases by incorporating the flux ratio of optical Fe II to Hβ. I will present the result of using this R-L relationship to estimate the black hole mass and accretion rate parameters of quasars in a wide range of redshifts. Failure to use a Fe-corrected R-L relationship results in the virial mass overestimated by a factor of two, on average, and up to an order of magnitude for highly accreting black holes. |
| 语种 | 英语 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299161]  |
| 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 | Maithil, Jaya,Brotherton, Michael,Shemmer, Ohad,et al. Quasars with highly accreting black holes: their X-ray properties and modified prescription of single-epoch mass[J]. American Astronomical Society Meeting Abstracts,2022,54(6):316.02D. |
| APA | Maithil, Jaya.,Brotherton, Michael.,Shemmer, Ohad.,Du, Pu.,Wang, Jian-Min.,...&Matthews, Brandon.(2022).Quasars with highly accreting black holes: their X-ray properties and modified prescription of single-epoch mass.American Astronomical Society Meeting Abstracts,54(6),316.02D. |
| MLA | Maithil, Jaya,et al."Quasars with highly accreting black holes: their X-ray properties and modified prescription of single-epoch mass".American Astronomical Society Meeting Abstracts 54.6(2022):316.02D. |
入库方式： OAI收割
来源：高能物理研究所
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