Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations
文献类型：期刊论文
| 作者 | Zong,Weikai10; Fu,Jian-Ning10; Cat,Peter De11; Wang,Jiaxin10; Shi,Jianrong12; Luo,Ali12; Zhang,Haotong12; Frasca,A.7; Molenda-?akowicz,J.8; Gray,R. O.9 |
| 刊名 | The Astrophysical Journal Supplement Series
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 251期号:1 |
| 关键词 | Catalogs Spectroscopy Surveys Fundamental parameters of stars Astrostatistics Astronomy databases |
| ISSN号 | 0067-0049 |
| DOI | 10.3847/1538-4365/abbb2d |
| 英文摘要 | Abstract Phase II of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)-Kepler/K2 survey (LK–MRS), initiated in 2018, aims at collecting medium-resolution spectra (R?～?7500; hereafter MRS) for more than 50,000 stars with multiple visits (～60 epochs) over a period of 5 yr (2018 September to 2023 June). We selected 20 footprints distributed across the Kepler field and six K2 campaigns, with each plate containing a number of stars ranging from ～2000 to ～3000. During the first year of observations, the LK–MRS has already visited 13 plates 223 times over 40 individual nights, and collected ～280,000 and ～369,000 high-quality spectra in the blue and red wavelength ranges, respectively. The atmospheric parameters and radial velocities for ～259,000 spectra of 21,053 targets were successfully calculated by the LAMOST stellar parameter pipeline. The internal uncertainties for the effective temperature, surface gravity, metallicity, and radial velocity are found to be 100 K, 0.15 dex, 0.09 dex, and 1.00 km s?1, respectively, when derived from a medium-resolution LAMOST spectrum with a signal-to-noise ratio (S/N) in the g band of 10. All of the uncertainties decrease as S/N increases, but they stabilize for S/N?>?100. We found 14,997, 20,091, and 1514 stars in common with the targets from the LAMOST low-resolution survey (LRS), Gaia, and the Apache Point Observatory Galactic Evolution Experiment (APOGEE), respectively, corresponding to fractions of ～70%, ～95%, and ～7.2%. In general, the parameters derived from LK–MRS spectra are consistent with those obtained from the LRS and APOGEE spectra, but the scatter increases as the surface gravity decreases when comparing with the measurements from APOGEE. A large discrepancy is found with the Gaia values of the effective temperature. Comparisons of the radial velocities of LK–MRS to Gaia and LK–MRS to APOGEE nearly follow a Gaussian distribution with means of μ?～?1.10 and 0.73 km s?1, respectively. We expect that the results from the LK–MRS spectra will shed new light on binary stars, asteroseismology, stellar activity, and other research fields. |
| 语种 | 英语 |
| WOS记录号 | IOP:0067-0049-251-1-ABBB2D |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/57755]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Vatican Observatory Research Group, Steward Observatory, Tucson, AZ 85721-0065, USA 2.IRAP, Université de Toulouse, CNRS, UPS, CNES, 14 avenue Edouard Belin, F-31400, Toulouse, France 3.Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 210042, People’s Republic of China 4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 5.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, People’s Republic of China 6.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 7.INAF—Osservatorio Astrofisico di Catania, Via S. Sofia 78, I-95123 Catania, Italy 8.Astronomical Institute of the University of Wroc?aw, ul. Kopernika 11, 51-622 Wroc?aw, Poland 9.Department of Physics and Astronomy, Appalachian State University, Boone, NC 28608, USA 10.Department of Astronomy, Beijing Normal University, Beijing 100875, People’s Republic of China; jnfu@bnu.edu.cn |
| 推荐引用方式 GB/T 7714 | Zong,Weikai,Fu,Jian-Ning,Cat,Peter De,et al. Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations[J]. The Astrophysical Journal Supplement Series,2020,251(1). |
| APA | Zong,Weikai.,Fu,Jian-Ning.,Cat,Peter De.,Wang,Jiaxin.,Shi,Jianrong.,...&Zuo,Heng.(2020).Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations.The Astrophysical Journal Supplement Series,251(1). |
| MLA | Zong,Weikai,et al."Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations".The Astrophysical Journal Supplement Series 251.1(2020). |
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