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LAMOST Time-Domain survey: first results of four K2 plates
Wang, Song1; Zhang, Hao-Tong1; Bai, Zhong-Rui1; Yuan, Hai-Long1; Xiang, Mao-Sheng2; Zhang, Bo3; Hou, Wen1; Zuo, Fang1; Du, Bing1; Li, Tan-Da3,4,5; Yang, Fan1,3,6; Cui, Kai-Ming1,6; Wang, Yi-Lun1,6; Li, Jiao1; Kovalev, Mikhail2,7; Li, Chun-Qian1; Tian, Hao1; Zong, Wei-Kai3; Han, Heng-Geng1,6; Liu, Chao6,8; Luo, A-Li1,6; Shi, Jian-Rong1,6; Fu, Jian-Ning3; Bi, Shao-Lan3; Han ZW(韩占文)7; Liu, Ji-Feng1,6,9
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2021-12
Volume21Issue:11
DOI10.1088/1674-4527/21/11/292
Contribution Rank第7完成单位
Indexed BySCI
Keywordastronomical database miscellaneous catalogs stars fundamental parameters binaries general binaries spectroscopic
Abstract

From Oct. 2019 to Apr. 2020, LAMOST performed a time-domain (TD) spectroscopic survey of four K2 plates with both low- and medium-resolution observations. The low-resolution spectroscopic survey acquired 282 exposures ( approximate to 46.6 h) over 25 nights, yielding a total of about 767 000 spectra, and the medium-resolution survey took 177 exposures ( approximate to 49.1 h) over 27 nights, collecting about 478 000 spectra. More than 70%/50% of low-resolution/medium-resolution spectra have signal-to-noise ratio higher than 10. We determine stellar parameters (e.g., T (eff), log g, [Fe/H]) and radial velocity (RV) with different methods, including LASP, DD-Payne and SLAM. In general, these parameter estimations from different methods show good agreement, and the stellar parameter values are consistent with those of APOGEE. We use the Gaia DR2 RV values to calculate a median RV zero point (RVZP) for each spectrograph exposure by exposure, and the RVZP-corrected RVs agree well with the APOGEE data. The stellar evolutionary and spectroscopic masses are estimated based on the stellar parameters, multi-band magnitudes, distances and extinction values. Finally, we construct a binary catalog including about 2700 candidates by analyzing their light curves, fitting the RV data, calculating the binarity parameters from medium-resolution spectra and cross-matching the spatially resolved binary catalog from Gaia EDR3. The LAMOST TD survey is expected to represent a breakthrough in various scientific topics, such as binary systems, stellar activity, stellar pulsation, etc.

Funding ProjectNational Development and Reform Commission ; Alfred P. Sloan FoundationAlfred P. Sloan Foundation ; U.S. Department of Energy Office of ScienceUnited States Department of Energy (DOE) ; Center for High-Performance Computing at the University of Utah ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11988101] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11933004] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12003050] ; National Key Research and Development Program of China[2019YFA0405000] ; National Key Research and Development Program of China[2019YFA0405504] ; National Key Research and Development Program of China[2016YFA0400804] ; B-type Strategic Priority Program of the Chinese Academy of Sciences (CAS)[XDB41000000] ; Youth Innovation Promotion Association of CAS[2019057] ; Youth Innovation Promotion Association of CAS[2020060] ; European Research Council (ERC) under the European Union Horizon 2020 research and innovation programmeEuropean Research Council (ERC)[804752]
Funding OrganizationNational Development and Reform Commission ; Alfred P. Sloan FoundationAlfred P. Sloan Foundation ; U.S. Department of Energy Office of ScienceUnited States Department of Energy (DOE) ; Center for High-Performance Computing at the University of Utah ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11988101, 11933004, 12003050] ; National Key Research and Development Program of China[2019YFA0405000, 2019YFA0405504, 2016YFA0400804] ; B-type Strategic Priority Program of the Chinese Academy of Sciences (CAS)[XDB41000000] ; Youth Innovation Promotion Association of CAS[2019057, 2020060] ; European Research Council (ERC) under the European Union Horizon 2020 research and innovation programmeEuropean Research Council (ERC)[804752]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS IDWOS:000735639800001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordVARIABLE-STARS ; BINARIES ; CATALOG ; TABLES
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ynao.ac.cn/handle/114a53/24756
Collection大样本恒星演化研究组
Corresponding AuthorWang, Song
Affiliation1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;
2.Max-Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany;
3.Department of Astronomy, Beijing Normal University, Beijing 100875, China;
4.School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK;
5.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark;
6.College of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
7.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650216, China;
8.Key Lab of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;
9.WHU-NAOC Joint Center for Astronomy, Wuhan University, Wuhan 430072, China
Recommended Citation
GB/T 7714
Wang, Song,Zhang, Hao-Tong,Bai, Zhong-Rui,et al. LAMOST Time-Domain survey: first results of four K2 plates[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(11).
APA Wang, Song.,Zhang, Hao-Tong.,Bai, Zhong-Rui.,Yuan, Hai-Long.,Xiang, Mao-Sheng.,...&Liu, Ji-Feng.(2021).LAMOST Time-Domain survey: first results of four K2 plates.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(11).
MLA Wang, Song,et al."LAMOST Time-Domain survey: first results of four K2 plates".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.11(2021).
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