Hot Subdwarf Stars Observed in Gaia DR2 and LAMOST DR5
文献类型：期刊论文
| 作者 | Luo,Yangping2; Németh,Péter1,3; Deng,Licai2,4 ; Han,Zhanwen5
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2019-08-06 |
| 卷号 | 881期号:1 |
| 关键词 | stars: kinematics and dynamics subdwarfs surveys |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab298d |
| 英文摘要 | Abstract Combing Gaia DR2 with LAMOST DR5, we spectroscopically identified 924 hot subdwarf stars, among which 32 stars exhibit strong double-lined composite spectra. We measured the effective temperature Teff, surface gravity , helium abundance y?=?nHe/nH, and radial velocities (RVs) of 892 non-composite spectra hot subdwarf stars by fitting LAMOST observations with Tlusty/Synspec non-LTE synthetic spectra. We outlined four different groups in the diagram with our helium abundance classification scheme and two nearly parallel sequences in the diagram. 3D Galactic space motions and orbits of 747 hot subdwarf stars with (GBP???GRP)0? |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-881-1-AB298D |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/27417]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Astroserver.org, 8533 Malomsok, Hungary 2.Department of Astronomy, China West Normal University, Nanchong, 637002, People’s Republic of China; ypluo@bao.ac.cn 3.Astronomical Institute of the Czech Academy of Sciences, CZ-25165, Ondr?ejov, Czech Republic 4.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China 5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Luo,Yangping,Németh,Péter,Deng,Licai,et al. Hot Subdwarf Stars Observed in Gaia DR2 and LAMOST DR5[J]. The Astrophysical Journal,2019,881(1). |
| APA | Luo,Yangping,Németh,Péter,Deng,Licai,&Han,Zhanwen.(2019).Hot Subdwarf Stars Observed in Gaia DR2 and LAMOST DR5.The Astrophysical Journal,881(1). |
| MLA | Luo,Yangping,et al."Hot Subdwarf Stars Observed in Gaia DR2 and LAMOST DR5".The Astrophysical Journal 881.1(2019). |
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