Differential Interferometric Signatures of Close Binaries of Supermassive Black Holes in Active Galactic Nuclei
文献类型：期刊论文
| 作者 | Songsheng, Yu-Yang1,2; Wang, Jian-Min1,2,3; Li, Yan-Rong1,2; Du, Pu1,2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-08-20 |
| 卷号 | 881期号:2页码:12 |
| ISSN号 | 0004-637X |
| 关键词 | supermassive black holes binary black holes optical interferometry |
| DOI | 10.3847/1538-4357/ab2e00 |
| 英文摘要 | In the present paper, we explore opportunities of applying the GRAVITY at the Very Large Telescope Interferometer with unprecedented spatial resolution to identify close binaries of supermassive black holes (CB-SMBHs) in active galactic nuclei (AGNs). Each supermassive black hole is assumed to be separately surrounded by its own broad-line regions (BLRs) composed of clouds with virialized motion. Composition of the binary orbital motion and the virial motion of clouds in each BLR determines the projected velocity fields and hence differential phase curves, which are obviously different from that of a single BLR. We calculate emission line profiles and differential phase curves of CB-SMBHs for the GRAVITY. For the simplest case, in which angular momenta of two BLRs and orbital motion are parallel, a phase plateau generally appears in the phase curves. For other combinations of the angular momentum, the plateau is replaced by new peaks and valleys variously depending on the situation. Given a combination, phase curves are also sensitive to changes of parameters of CB-SMBHs. All these features are easily distinguished from the well-known S-shaped phase curves of a single BLR, so that the GRAVITY is expected to reveal signals of CB-SMBH from candidates of AGNs. With joint analysis of observations of reverberation-mapping campaigns, we can reliably identify CB-SMBHs, and measure their orbital parameters in the meanwhile. This independent measurement of the orbital parameters also has implications to analysis of pulsar timing array observations for properties of low-frequency gravitational waves in future. |
| WOS关键词 | ACCRETION DISKS ; EMISSION ; VARIABILITY ; QUASARS ; LINES |
| 资助项目 | National Key R&D Program of China[2016YFA0400701] ; National Key R&D Program of China[2016YFA0400702] ; NSFC[NSFC-1187 3048] ; NSFC[NSFC-11833008] ; NSFC[NSFC-11573026] ; NSFC[NSFC-11473002] ; NSFC[NSFC-11721303] ; NSFC[NSFC-1177 3029] ; NSFC[NSFC-11690024] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-SLH007] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB23010400] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000482527100023 |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key R&D Program of China ; National Key R&D Program of China ; NSFC ; NSFC ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/27408]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Wang, Jian-Min |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ China, 20A Datun Rd, Beijing 100020, Peoples R China |
| 推荐引用方式 GB/T 7714 | Songsheng, Yu-Yang,Wang, Jian-Min,Li, Yan-Rong,et al. Differential Interferometric Signatures of Close Binaries of Supermassive Black Holes in Active Galactic Nuclei[J]. ASTROPHYSICAL JOURNAL,2019,881(2):12. |
| APA | Songsheng, Yu-Yang,Wang, Jian-Min,Li, Yan-Rong,&Du, Pu.(2019).Differential Interferometric Signatures of Close Binaries of Supermassive Black Holes in Active Galactic Nuclei.ASTROPHYSICAL JOURNAL,881(2),12. |
| MLA | Songsheng, Yu-Yang,et al."Differential Interferometric Signatures of Close Binaries of Supermassive Black Holes in Active Galactic Nuclei".ASTROPHYSICAL JOURNAL 881.2(2019):12. |
入库方式： OAI收割
来源：国家天文台
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