Investigation on the short-period eclipsing Am binary V404 Aur and GWGem
文献类型：期刊论文
| 作者 | Tian, Xiao-Man4; Wang, Zhi-Hua3; Zhu LY(朱俐颖)1,2,6 ; Wang, Jing-Jing5
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
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| 出版日期 | 2025-01-09 |
| 卷号 | 42 |
| 关键词 | Stars: binaries: close stars: binaries: eclipsing stars: chemically peculiar stars: binaries: individual (V404 Aur) stars: binaries: individual (GW Gem) stars: evolution |
| ISSN号 | 1323-3580 |
| DOI | 10.1017/pasa.2024.115 |
| 产权排序 | 第3完成单位 |
| 文献子类 | Article |
| 英文摘要 | The multi-colour complete light curves and low-resolution spectra of two short period eclipsing Am binaries V404 Aur and GW Gem are presented. The stellar atmospheric parameters of the primary stars were derived through the spectra fitting. The observed and TESS-based light curves of them were analysed by using the Wilson-Devinney code. The photometric solutions suggest that both V404 Aur and GW Gem are semi-detached systems with the secondary component filling its critical Roche Lobe, while the former should be a marginal contact binary. The O-C analysis found that the period of V404 Aur is decreasing at a rate of dP/dt=-1.06(+/- 0.01)x10(-7)dyr(-1), while the period of GW Gem is increasing at dP/dt=+2.41(+/- 0.01)x10(-8)dyr(-1). The period decrease of V404 Aur may mainly be caused by the combined effects of the angular momentum loss (AML) via an enhanced stellar wind of the more evolved secondary star and mass transfer between two components. The period increase of GW Gem supports the mass transfer from the secondary to the primary. Both targets may be in the broken contact stage predicted by the thermal relaxation oscillations theory and will eventually evolve to the contact stage. We have collected about 54 well-known eclipsing Am binaries with absolute parameters from the literature. The relations of these parameters are summarised. There are some components that have a higher degree of evolution. The majority of their hydrogen shell may have been stripped away and the stellar internal layer exposed. The accretion processes from such evolved components may be very important for the formation of Am peculiarity in binaries. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | EDINBURGH BLDG, SHAFTESBURY RD, CB2 8RU CAMBRIDGE, ENGLAND |
| WOS关键词 | PARSEC EVOLUTIONARY TRACKS ; ABSOLUTE DIMENSIONS ; CLOSE-BINARY ; STELLAR EVOLUTION ; ORBITAL ELEMENTS ; MASSIVE STARS ; LIGHT CURVES ; DELTA-SCUTI ; SYSTEM ; CATALOG |
| 资助项目 | National Natural Science Foundation of China[12103030]; National Natural Science Foundation of China[12303038]; Natural Science of Shandong Province[ZR2021QA082]; Natural Science Foundation of Xinjiang Uygur Autonomous Rejion[2022DO1A164]; Joint Research Found[U1831109]; National Science Foundation of China (NSFC); Chinese Academy of Sciences (CAS); CAS 'Light of West China' Program; Research Fund of Key Laboratory of Aircraft Environment Control and Life Support, MIIT, Nanjing University of Aeronautics and Astronautics[202203] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001394077600001 |
| 出版者 | CAMBRIDGE UNIV PRESS |
| 资助机构 | National Natural Science Foundation of China[12103030, 12303038] ; Natural Science of Shandong Province[ZR2021QA082] ; Natural Science Foundation of Xinjiang Uygur Autonomous Rejion[2022DO1A164] ; Joint Research Found[U1831109] ; National Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; CAS 'Light of West China' Program ; Research Fund of Key Laboratory of Aircraft Environment Control and Life Support, MIIT, Nanjing University of Aeronautics and Astronautics[202203] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27980]  |
| 专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.University of the Chinese Academy of Science, Beijing, China; 2.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming, China; 3.School of Mathematics and Information Sciences, Yantai University, Yantai, China; 4.School of Aeronautics, Shandong Jiaotong University, Jinan, China; 5.China University of Petroleum-Beijing at Karamay, Karamay, China 6.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, China; |
| 推荐引用方式 GB/T 7714 | Tian, Xiao-Man,Wang, Zhi-Hua,Zhu LY,et al. Investigation on the short-period eclipsing Am binary V404 Aur and GWGem[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,2025,42. |
| APA | Tian, Xiao-Man,Wang, Zhi-Hua,朱俐颖,&Wang, Jing-Jing.(2025).Investigation on the short-period eclipsing Am binary V404 Aur and GWGem.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,42. |
| MLA | Tian, Xiao-Man,et al."Investigation on the short-period eclipsing Am binary V404 Aur and GWGem".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 42(2025). |
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来源：云南天文台
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