The Impact of Elliptical Broad-line Regions on Reverberation-based Black Hole Mass Estimates
文献类型：期刊论文
| 作者 | Wu, Jiancheng1; Feng HC(封海成)2; Wu, Qingwen3; Cao, Xinwu1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2026-06-01 |
| 卷号 | 1003期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae64f4 |
| 产权排序 | 第2完成单位 |
| 文献子类 | Article |
| 英文摘要 | The virial factor f is critical for accurate supermassive black hole (SMBH) mass measurements using reverberation mapping (RM) and the radius-luminosity (R-L) relation, yet its value remains highly uncertain. While traditional models assume axisymmetric broad-line region (BLR) geometries, growing evidence suggests that BLRs may possess more complex, asymmetric structures. We systematically investigate the impact of elliptical-disk BLR geometries on SMBH mass determinations through comprehensive numerical simulations. By computing emission-line profiles, emissivity-weighted time lags, and the corresponding virial factor f over a wide range of eccentricities, orientations, and inclinations, we find that even in purely virialized systems, geometric effects alone can cause f to vary by more than 1 order of magnitude and can mimic observational signatures typically attributed to radiation pressure. Additionally, local broadening introduces further systematic uncertainties in velocity width measurements, biasing f by up to a factor of similar to 3. Asymmetric BLR configurations also induce a scatter of similar to 0.18 dex in the R-L relation due to projection effects, comparable to the intrinsic scatter observed in RM studies. These results challenge the conventional attribution of RM uncertainties to nonvirial motions or radiation pressure, and instead highlight the fundamental role of BLR geometry in SMBH mass measurements. |
| 学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | ACTIVE GALACTIC NUCLEI ; AGN MONITORING PROJECT ; PEAKED EMISSION-LINES ; REDSHIFTED H-BETA ; MAPPING PROJECT ; ACCRETION DISK ; VIRIAL FACTOR ; NGC 4151 ; QUASARS ; PROFILE |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)[12533005] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001769178300001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Natural Science Foundation of China (NSFC)[12533005] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/29230]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 通讯作者 | Feng HC(封海成) |
| 作者单位 | 1.Institute for Astronomy, School of Physics, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People’s Republic of China; xwcao@zju.edu.cn; 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650216, People’s Republic of China; hcfeng@ynao.ac.cn; 3.Department of Astronomy, School of Physics, Huazhong University of Science and Technology, Luoyu Road, Wuhan 1037, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Wu, Jiancheng,Feng HC,Wu, Qingwen,et al. The Impact of Elliptical Broad-line Regions on Reverberation-based Black Hole Mass Estimates[J]. ASTROPHYSICAL JOURNAL,2026,1003(2). |
| APA | Wu, Jiancheng,封海成,Wu, Qingwen,&Cao, Xinwu.(2026).The Impact of Elliptical Broad-line Regions on Reverberation-based Black Hole Mass Estimates.ASTROPHYSICAL JOURNAL,1003(2). |
| MLA | Wu, Jiancheng,et al."The Impact of Elliptical Broad-line Regions on Reverberation-based Black Hole Mass Estimates".ASTROPHYSICAL JOURNAL 1003.2(2026). |
入库方式： OAI收割
来源：云南天文台
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