Spitzer + VLTI-GRAVITY Measure the Lens Mass of a Nearby Microlensing Event
文献类型：期刊论文
| 作者 | Zang,Weicheng2; Dong,Subo3; Gould,Andrew4,5; Calchi Novati,Sebastiano6; Chen,Ping3,7; Yang,Hongjing2; Li,Shun-Sheng8,9; Mao,Shude2,8 ; Alton,K. B.1; Brimacombe,J.10
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2020-07-01 |
| 卷号 | 897期号:2 |
| 关键词 | Gravitational microlensing Satellite microlensing parallax Stellar masses Stellar distance |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab9749 |
| 英文摘要 | Abstract We report the lens mass and distance measurements of the nearby microlensing event TCP J05074264+2447555 (Kojima-1). We measure the microlens parallax vector using Spitzer and ground-based light curves with constraints on the direction of lens-source relative proper motion derived from Very Large Telescope Interferometer (VLTI) GRAVITY observations. Combining this determination with the angular Einstein radius measured by VLTI-GRAVITY observations, we find that the lens is a star with mass at a distance DL?=?429?±?21 pc. We find that the blended light basically all comes from the lens. The lens-source proper motion is , so with currently available adaptive-optics instruments, the lens and source can be resolved in 2021. This is the first microlensing event whose lens mass is unambiguously measured by interferometry + satellite-parallax observations, which opens a new window for mass measurements of isolated objects such as stellar-mass black holes. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-897-2-AB9749 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/63140]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Desert Blooms Observatory, Chile 2.Department of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing 100084, People's Republic of China zangwc17@mails.tsinghua.edu.cn 3.Kavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Road 5, Hai Dian District, Beijing 100871, People's Republic of China dongsubo@pku.edu.cn 4.Max-Planck-Institute for Astronomy, K?nigstuhl 17, D-69117 Heidelberg, Germany 5.Department of Astronomy, Ohio State University, 140 W. 18th Avenue, Columbus, OH 43210, USA 6.IPAC, Mail Code 100-22, Caltech, 1200 E. California Boulevard, Pasadena, CA 91125, USA 7.Department of Astronomy, School of Physics, Peking University, Yi He Yuan Road 5, Hai Dian District, Beijing 100871, People's Republic of China 8.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China 9.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 10.Coral Towers Observatory, Cairns, Queensland 4870, Australia |
| 推荐引用方式 GB/T 7714 | Zang,Weicheng,Dong,Subo,Gould,Andrew,et al. Spitzer + VLTI-GRAVITY Measure the Lens Mass of a Nearby Microlensing Event[J]. The Astrophysical Journal,2020,897(2). |
| APA | Zang,Weicheng.,Dong,Subo.,Gould,Andrew.,Calchi Novati,Sebastiano.,Chen,Ping.,...&Zhu,Wei.(2020).Spitzer + VLTI-GRAVITY Measure the Lens Mass of a Nearby Microlensing Event.The Astrophysical Journal,897(2). |
| MLA | Zang,Weicheng,et al."Spitzer + VLTI-GRAVITY Measure the Lens Mass of a Nearby Microlensing Event".The Astrophysical Journal 897.2(2020). |
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