Identification of New Classical Be Stars from the LAMOST Medium Resolution Survey | |
Wang LQ(王璐茜)6; Li, Jiao5; Wu, You5; Gies, Douglas R.4; Liu, Jin Zhong2,3; Liu, Chao5; Guo YJ(郭彦君)2,6; Chen XF(陈雪飞)1,6; Han ZW(韩占文)1,6 | |
刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES |
2022-06-01 | |
卷号 | 260期号:2 |
ISSN号 | 0067-0049 |
DOI | 10.3847/1538-4365/ac617a |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Be stars are B-type main-sequence stars that display broad Balmer emission lines in their spectra. Identification of the Be population is essential to further examine the formation and evolutionary models. We report the detection of classical Be (CBe) stars from observations with the Large sky Area Multi-Object fiber Spectroscopic Telescope Medium Resolution Survey Data Release 7 (LAMOST MRS DR7). We used a deep convolutional neural network, ResNet, with an 18 layer module to examine the morphology of the H alpha profile. We identified 1162 candidate Be stars from the collection of 2,260,387 spectra for 789,918 stars in the database. The ResNet network achieves a Be-star classification accuracy of 99.5%. Among the detections, 151 of these are prior known Be stars crossmatched from the literature. By applying a three-step test, we identified 183 new CBe stars. We find that 41 CBe stars are members of known open clusters. Based on an investigation of the kinematics of the identified CBe stars from the Gaia EDR3 astrometric solutions, we identified 16 new runaways. These new identifications will provide a reference for future follow-ups to further investigate their physical properties. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星天文学 ; 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 |
资助项目 | Chinese National Science Foundation[12090040] ; Chinese National Science Foundation[12090043] ; Chinese National Science Foundation[11733008] ; Chinese National Science Foundation[12103064] ; National Development and Reform Commission |
WOS关键词 | HIGH-VELOCITY ; O-STAR ; CATALOG ; RUNAWAY ; EMISSION ; STELLAR ; SEARCH ; LINE ; KINEMATICS ; PARAMETERS |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000812408600001 |
资助机构 | Chinese National Science Foundation[12090040, 12090043, 11733008, 12103064] ; National Development and Reform Commission |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25222] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Li, Jiao |
作者单位 | 1.Center for Astronomical Mega-Science, Chinese Academy of Science, Beijing 100012, People's Republic of China 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 3.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, People's Republic of China; 4.Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA; 5.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; lijiao@bao.ac.cn, wuyou@nao.cas.cn; 6.Yunnan Observatories, CAS, P.O. Box 110, Kunming 650011, Yunnan, People's Republic of China; wangluqian@ynao.ac.cn; |
推荐引用方式 GB/T 7714 | Wang LQ,Li, Jiao,Wu, You,et al. Identification of New Classical Be Stars from the LAMOST Medium Resolution Survey[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2022,260(2). |
APA | Wang LQ.,Li, Jiao.,Wu, You.,Gies, Douglas R..,Liu, Jin Zhong.,...&Han ZW.(2022).Identification of New Classical Be Stars from the LAMOST Medium Resolution Survey.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,260(2). |
MLA | Wang LQ,et al."Identification of New Classical Be Stars from the LAMOST Medium Resolution Survey".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 260.2(2022). |
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