MICROLENSING OF SUB-PARSEC MASSIVE BINARY BLACK HOLES IN LENSED QSOs: LIGHT CURVES AND SIZE-WAVELENGTH RELATION
文献类型：期刊论文
| 作者 | Yan, Chang-Shuo1 ; Lu, Youjun1; Yu, Qingjuan2; Mao, Shude1; Wambsganss, Joachim3,4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-04-01 |
| 卷号 | 784期号:2 |
| 关键词 | accretion accretion disks black hole physics galaxies: formation gravitational lensing: micro quasars: general relativistic processes |
| 英文摘要 | Sub-parsec binary massive black holes (BBHs) have long been thought to exist in many QSOs but remain observationally elusive. In this paper, we propose a novel method to probe sub-parsec BBHs through microlensing of lensed QSOs. If a QSO hosts a sub-parsec BBH in its center, it is expected that the BBH is surrounded by a circumbinary disk, each component of the BBH is surrounded by a small accretion disk, and a gap is opened by the secondary component in between the circumbinary disk and the two small disks. Assuming such a BBH structure, we generate mock microlensing light curves for some QSO systems that host BBHs with typical physical parameters. We show that microlensing light curves of a BBH QSO system at the infrared-optical-UV bands can be significantly different from those of corresponding QSO system with a single massive black hole (MBH), mainly because of the existence of the gap and the rotation of the BBH (and its associated small disks) around the center of mass. We estimate the half-light radii of the emission region at different wavelengths from mock light curves and find that the obtained half-light radius versus wavelength relations of BBH QSO systems can be much flatter than those of single MBH QSO systems at a wavelength range determined by the BBH parameters, such as the total mass, mass ratio, separation, accretion rates, etc. The difference is primarily due to the existence of the gap. Such unique features on the light curves and half-light radius-wavelength relations of BBH QSO systems can be used to select and probe sub-parsec BBHs in a large number of lensed QSOs to be discovered by current and future surveys, including the Panoramic Survey Telescope and Rapid Response System, the Large Synoptic Survey telescope, and Euclid. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000335519400015 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6619]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 3.Heidelberg Univ, Astron Rechen Inst, D-69120 Heidelberg, Germany 4.Heidelberg Univ, Zentrum Astron, D-69120 Heidelberg, Germany |
| 推荐引用方式 GB/T 7714 | Yan, Chang-Shuo,Lu, Youjun,Yu, Qingjuan,et al. MICROLENSING OF SUB-PARSEC MASSIVE BINARY BLACK HOLES IN LENSED QSOs: LIGHT CURVES AND SIZE-WAVELENGTH RELATION[J]. ASTROPHYSICAL JOURNAL,2014,784(2). |
| APA | Yan, Chang-Shuo,Lu, Youjun,Yu, Qingjuan,Mao, Shude,&Wambsganss, Joachim.(2014).MICROLENSING OF SUB-PARSEC MASSIVE BINARY BLACK HOLES IN LENSED QSOs: LIGHT CURVES AND SIZE-WAVELENGTH RELATION.ASTROPHYSICAL JOURNAL,784(2). |
| MLA | Yan, Chang-Shuo,et al."MICROLENSING OF SUB-PARSEC MASSIVE BINARY BLACK HOLES IN LENSED QSOs: LIGHT CURVES AND SIZE-WAVELENGTH RELATION".ASTROPHYSICAL JOURNAL 784.2(2014). |
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来源：国家天文台
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