The Early-type Stars from the LAMOST Survey: Atmospheric Parameters
文献类型:期刊论文
作者 | Guo YJ(郭彦君)4,5,6; Zhang, Bo3; Liu, Chao2,5; Li, Jiao2; Li JD(李江丹)5,6; Wang LQ(王璐茜)6; Liu, Zhicun5; Hou, Yong-Hui1,5; Han ZW(韩占文)5,6; Chen XF(陈雪飞)5,6 |
刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES |
出版日期 | 2021-12 |
卷号 | 257期号:2 |
ISSN号 | 0067-0049 |
DOI | 10.3847/1538-4365/ac2ded |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Massive stars play key roles in many astrophysical processes. Deriving the atmospheric parameters of massive stars is important to understanding their physical properties, and thus the atmospheric parameters are key inputs to trace the evolution of massive stars. Here we report our work on adopting the data-driven technique called stellar label machine (SLAM) with the nonlocal thermal equilibrium TLUSTY synthetic spectra as the training data set to estimate the stellar parameters of Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) optical spectra for early-type stars. We apply two consistency tests to verify this machine-learning method and compare stellar labels given by SLAM with the labels in the literature for several objects having high-resolution spectra. We provide the stellar labels of effective temperature (T-eff), surface gravity (log g), metallicity GM/HD, and projected rotational velocity (v sin i) for 3931 and 578 early-type stars from the LAMOST low-resolution survey (LRS) and medium-resolution survey (MRS), respectively. To estimate the average statistical uncertainties of our results, we calculated the standard deviation between the predicted stellar label and the prelabeled published values from the high-resolution spectra. The uncertainties of the four parameters are sigma(T-eff) = 2185 K, sigma(log g) = 0.29 dex, and sigma(v sin i) = 11 km s(-1) for MRS, and sigma(T-eff) = 1642 K, sigma(log g) = 0.25 dex, and sigma(v sin i) = 42 km s(-1) for LRS spectra, respectively. We note that the parameters of T-eff, log g, and [M/H] can be better constrained using LRS spectra than using MRS spectra, most likely due to their broad wavelength coverage, while v sin i is constrained better by MRS spectra than by LRS spectra, probably due to the relatively accurate line profiles of MRS spectra. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
WOS关键词 | BLANKETED MODEL ATMOSPHERES ; VLT-FLAMES SURVEY ; STELLAR EVOLUTION ; MASSIVE STARS ; MAGELLANIC-CLOUD ; OB STARS ; ABUNDANCES ; BINARIES ; GALAXY |
资助项目 | Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11733008] ; Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12090040] ; Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12090043] ; Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11521303] ; Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12125303] ; Yunnan province ; National Ten-thousand talents program ; National Key R & D Program of China[2019YFA0405500] ; NSFCNational Natural Science Foundation of China (NSFC)[11835057] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-SLH007] ; China Manned Space Project[CMS-CSST-2021-A10] ; National Development and the Reform Commission |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000727012600001 |
资助机构 | Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11733008, 12090040, 12090043, 11521303, 12125303] ; Yunnan province ; National Ten-thousand talents program ; National Key R & D Program of China[2019YFA0405500] ; NSFCNational Natural Science Foundation of China (NSFC)[11835057] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-SLH007] ; China Manned Space Project[CMS-CSST-2021-A10] ; National Development and the Reform Commission |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24709] |
专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
通讯作者 | Wang LQ(王璐茜) |
作者单位 | 1.Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 210042, People's Republic of China 2.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; liuchao@bao.ac.cn; 3.Department of Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China; 4.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China; 5.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China; 6.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, People's Republic of China; cxf@ynao.ac.cn, wangluqian@ynao.ac.cn; |
推荐引用方式 GB/T 7714 | Guo YJ,Zhang, Bo,Liu, Chao,et al. The Early-type Stars from the LAMOST Survey: Atmospheric Parameters[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2021,257(2). |
APA | Guo YJ.,Zhang, Bo.,Liu, Chao.,Li, Jiao.,Li JD.,...&Chen XF.(2021).The Early-type Stars from the LAMOST Survey: Atmospheric Parameters.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,257(2). |
MLA | Guo YJ,et al."The Early-type Stars from the LAMOST Survey: Atmospheric Parameters".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 257.2(2021). |
入库方式: OAI收割
来源:云南天文台
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