A New Luminous Blue Variable in the Outskirts of the Andromeda Galaxy
文献类型:期刊论文
作者 | Huang, Y.1; Zhang, H.-W.2,3; Wang, C.2; Chen, B.-Q.1; Zhang YW(张杨威)4,5; Guo, J.-C.2,6; Yuan, H.-B.7; Xiang, M.-S.8; Tian, Z.-J.9; Li, G.-X.1 |
刊名 | The Astrophysical Journal Letters |
出版日期 | 2019-10-03 |
卷号 | 884期号:1 |
ISSN号 | 2041-8205 |
关键词 | Andromeda galaxy A supergiant stars Luminous blue variable stars |
DOI | 10.3847/2041-8213/ab430b |
产权排序 | 第5完成单位 |
英文摘要 | The hot massive luminous blue variables (LBVs) represent an important evolutionary phase of massive stars. Here, we report the discovery of a new LBV—LAMOST J0037+4016 in the distant outskirt of the Andromeda galaxy. It is located in the southwestern corner (a possible faint spiral arm) of M31 with an unexpectedly large projection distance of ~22 kpc from the center. The optical light curve shows a 1.2 mag variation in V band and its outburst and quiescence phases both last over several years. The observed spectra indicate an A-type supergiant at an epoch close to the outburst phase and a hot B-type supergiant with weak [Fe ii] emission lines at an epoch of much dimmer brightness. The near-infrared color–color diagram further shows that it follows the distribution of Galactic and M31 LBVs rather than B[e] supergiants. All the existing data strongly show that LAMOST J0037+4016 is an LBV. By spectral energy distribution fitting, we find it has a luminosity (4.42?±?1.64)?×?105 L⊙ and an initial mass ~30 M⊙, indicating its nature of a less luminosity class of LBV. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星天文学 |
URL标识 | 查看原文 |
语种 | 英语 |
出版者 | The American Astronomical Society |
WOS记录号 | IOP:2041-8205-884-1-AB430B |
源URL | [http://ir.ynao.ac.cn/handle/114a53/21450] |
专题 | 云南天文台_丽江天文观测站(南方基地) 云南天文台_中国科学院天体结构与演化重点实验室 |
作者单位 | 1.South-Western Institute for Astronomy Research (SWIFAR), Yunnan University (YNU), Kunming 650500, People's Republic of China 2.Department of Astronomy, Peking University (PKU), Beijing, 100871, People's Republic of China 3.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing, 100871, People's Republic of China 4.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 5.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China 6.Department of Physics and Astronomy, University College London, London WC1E 6BT, UK 7.Department of Astronomy, Beijing Normal University, Beijing, 100875, People's Republic of China 8.Max-Planck Institute for Astronomy, K?nigstuhl, D-69117, Heidelberg, Germany 9.Department of Astronomy, Yunnan University (YNU), Kunming 650500, People's Republic of China |
推荐引用方式 GB/T 7714 | Huang, Y.,Zhang, H.-W.,Wang, C.,et al. A New Luminous Blue Variable in the Outskirts of the Andromeda Galaxy[J]. The Astrophysical Journal Letters,2019,884(1). |
APA | Huang, Y..,Zhang, H.-W..,Wang, C..,Chen, B.-Q..,Zhang YW.,...&Liu, X.-W..(2019).A New Luminous Blue Variable in the Outskirts of the Andromeda Galaxy.The Astrophysical Journal Letters,884(1). |
MLA | Huang, Y.,et al."A New Luminous Blue Variable in the Outskirts of the Andromeda Galaxy".The Astrophysical Journal Letters 884.1(2019). |
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来源:云南天文台
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