THE FIRST HYPERVELOCITY STAR FROM THE LAMOST SURVEY
文献类型：期刊论文
| 作者 | Zheng, Zheng1 ; Carlin, Jeffrey L.2; Beers, Timothy C.3,4; Deng, Licai5; Grillmair, Carl J.6; Guhathakurta, Puragra7; Lepine, Sebastien8; Newberg, Heidi Jo2; Yanny, Brian9; Zhang, Haotong5
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
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| 出版日期 | 2014-04-20 |
| 卷号 | 785期号:2 |
| 关键词 | Galaxy: center Galaxy: disk Galaxy: halo Galaxy: kinematics and dynamics stars: early-type stars:individual(J091206.52+091621.8) |
| 英文摘要 | We report the first hypervelocity star (HVS) discovered from the LAMOST spectroscopic survey. It is a B-type star with a heliocentric radial velocity of about 620 km s(-1), which projects to a Galactocentric radial velocity component of similar to 477 km s(-1). With a heliocentric distance of similar to 13 kpc and an apparent magnitude of similar to 13 mag, it is the closest bright HVS currently known. With a mass of similar to 9 M-circle dot, it is one of the three most massive HVSs discovered so far. The star is clustered on the sky with many other known HVSs, and its position suggests a possible connection to Galactic center structures. With the current poorly determined proper motion, a Galactic center origin of this HVS remains consistent with the data at the 1 sigma level, while a disk runaway origin cannot be excluded. We discuss the potential of the LAMOST survey to discover a large statistical sample of HVSs of different types. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000334359800004 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6542]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA 2.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA 3.Natl Opt Astron Observ, Tucson, AZ 85719 USA 4.Univ Notre Dame, JINA, Notre Dame, IN 46556 USA 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 6.Spitzer Sci Ctr, Pasadena, CA 91125 USA 7.Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA 8.Georgia State Univ, Dept Phys & Astron, Atlanta, GA 30303 USA 9.Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA 10.Univ Sci & Technol China, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Zheng,Carlin, Jeffrey L.,Beers, Timothy C.,et al. THE FIRST HYPERVELOCITY STAR FROM THE LAMOST SURVEY[J]. ASTROPHYSICAL JOURNAL LETTERS,2014,785(2). |
| APA | Zheng, Zheng.,Carlin, Jeffrey L..,Beers, Timothy C..,Deng, Licai.,Grillmair, Carl J..,...&Zhang, Yong.(2014).THE FIRST HYPERVELOCITY STAR FROM THE LAMOST SURVEY.ASTROPHYSICAL JOURNAL LETTERS,785(2). |
| MLA | Zheng, Zheng,et al."THE FIRST HYPERVELOCITY STAR FROM THE LAMOST SURVEY".ASTROPHYSICAL JOURNAL LETTERS 785.2(2014). |
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来源：国家天文台
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