Stellar Parameters and Chemical Abundances Estimated from LAMOST-II DR8 MRS Based on Cycle-StarNet
文献类型:期刊论文
作者 | Wang, Rui11; Luo, A-Li10,11; Zhang, Shuo8,9; Ting, Yuan-Sen5,12; O'Briain, Teaghan4; LAMOST MRS Collaboration1,2,3,6,7,11,13 |
刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES |
出版日期 | 2023-06-01 |
卷号 | 266期号:2 |
ISSN号 | 0067-0049 |
DOI | 10.3847/1538-4365/acce36 |
产权排序 | 第9完成单位 |
文献子类 | Article |
英文摘要 | Deriving stellar atmospheric parameters and chemical abundances from stellar spectra is crucial for understanding the evolution of the Milky Way. By performing a fitting with MARCS model atmospheric theoretical synthetic spectra combined with a domain-adaptation method, we estimate the fundamental stellar parameters (T-eff, log g, [Fe/H], v(mic), and v(mac)) and 11 chemical abundances for 1.38 million FGKM-type stars of the Medium-Resolution Spectroscopic Survey (MRS) from LAMOST-II DR8. The domain-adaptation method, cycle-starnet, is employed to reduce the gap between observed and synthetic spectra, and the L-BFGS algorithm is used to search the best-fit synthetic spectra. By combining the Two Micron All Sky Survey photometric survey data, Gaia EDR3 parallax, and MIST isochrones, the surface gravities of the stars are constrained after estimating their bolometric luminosities. The accuracy of T-eff, log g, and [Fe/H] can reach 150 K, 0.11 dex, and 0.15 dex, evaluated by the PASTEL catalog, asteroseismic samples, and other spectroscopic surveys. The precision of these parameters and elemental abundances ([C/Fe], [Na/Fe], [Mg/Fe], [Si/Fe], [Ca/Fe], [Ti/Fe], [Cr/Fe], [Mn/Fe], [Co/Fe], [Ni/Fe], and [Cu/Fe]) is assessed by repeated observations and validated by cluster members. For spectra with signal-to-noise ratios (S/Ns) greater than 10, the precision of the three stellar parameters and elemental abundances can achieve 76 K, 0.014 dex, 0.096 dex, and 0.04-0.15 dex. For spectra with S/Ns higher than 100, the precision stabilizes at 22 K, 0.006 dex, 0.043 dex, and 0.01-0.06 dex. The full LAMOST MRS stellar properties catalog is available at doi: 10.12149/101242 . |
学科主题 | 天文学 ; 恒星与银河系 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
WOS关键词 | FGK BENCHMARK STARS ; 6TH DATA RELEASE ; ATMOSPHERIC PARAMETERS ; APOKASC CATALOG ; KEPLER TARGETS ; PASTEL CATALOG ; GAIA ; SPECTRA ; MILKY ; HOMOGENEITY |
资助项目 | National Natural Science Foundation of China[12103068] ; National Natural Science Foundation of China[11390371] ; National Natural Science Foundation of China[11703053] ; National Natural Science Foundation of China[11973060] ; National Natural Science Foundation of China[12090044] ; National Key R&D Program of China[2019YFA0405102] ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Science Research Grants China Manned Space Project[CMS-CSST-2021-B05] ; Australian Research Council through DECRA Fellowship[DE220101520] ; National Development and Reform Commission |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:001011119400001 |
资助机构 | National Natural Science Foundation of China[12103068, 11390371, 11703053, 11973060, 12090044] ; National Key R&D Program of China[2019YFA0405102] ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Science Research Grants China Manned Space Project[CMS-CSST-2021-B05] ; Australian Research Council through DECRA Fellowship[DE220101520] ; National Development and Reform Commission |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26086] |
专题 | 中国科学院云南天文台 |
通讯作者 | Wang, Rui; Luo, A-Li |
作者单位 | 1.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People's Republic of China; 2.Department of Physics, Hebei Normal University, Shijiazhuang 050024, People's Republic of China; 3.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, People's Republic of China; 4.Department of Physics and Astronomy, University of Victoria, Victoria, BC V9E 2E7, Canada; 5.Research School of Astronomy & Astrophysics, Australian National University, Cotter Road, Weston, ACT 2611, Australia; 6.Department of Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China; 7.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 8.Kavli Institute of Astronomy and Astrophysics, Peking University, Beijing 100871, People's Republic of China; 9.Department of Astronomy, Peking University, Beijing 100871, People's Republic of China; 10.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; |
推荐引用方式 GB/T 7714 | Wang, Rui,Luo, A-Li,Zhang, Shuo,et al. Stellar Parameters and Chemical Abundances Estimated from LAMOST-II DR8 MRS Based on Cycle-StarNet[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2023,266(2). |
APA | Wang, Rui,Luo, A-Li,Zhang, Shuo,Ting, Yuan-Sen,O'Briain, Teaghan,&LAMOST MRS Collaboration.(2023).Stellar Parameters and Chemical Abundances Estimated from LAMOST-II DR8 MRS Based on Cycle-StarNet.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,266(2). |
MLA | Wang, Rui,et al."Stellar Parameters and Chemical Abundances Estimated from LAMOST-II DR8 MRS Based on Cycle-StarNet".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 266.2(2023). |
入库方式: OAI收割
来源:云南天文台
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