Investigation on the short-period eclipsing Am binary V404 Aur and GWGem

doi:10.1017/pasa.2024.115

YNAO OpenIR > 双星与变星研究组

	Investigation on the short-period eclipsing Am binary V404 Aur and GWGem
	Tian, Xiao-Man 1; Wang, Zhi-Hua 2; Zhu LY(朱俐颖)3,4,5 ; Wang, Jing-Jing 6
发表期刊	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
	2025-01-09
卷号	42
DOI	10.1017/pasa.2024.115
产权排序	第3完成单位
收录类别	SCI
关键词	Stars: binaries: close stars: binaries: eclipsing stars: chemically peculiar stars: binaries: individual (V404 Aur) stars: binaries: individual (GW Gem) stars: evolution
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.
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]
项目资助者	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]
语种	英语
学科领域	天文学 ; 恒星与银河系
文章类型	Article
出版者	CAMBRIDGE UNIV PRESS
出版地	EDINBURGH BLDG, SHAFTESBURY RD, CB2 8RU CAMBRIDGE, ENGLAND
ISSN	1323-3580
URL	查看原文
WOS记录号	WOS:001394077600001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	PARSEC EVOLUTIONARY TRACKS ; ABSOLUTE DIMENSIONS ; CLOSE-BINARY ; STELLAR EVOLUTION ; ORBITAL ELEMENTS ; MASSIVE STARS ; LIGHT CURVES ; DELTA-SCUTI ; SYSTEM ; CATALOG
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/27980
专题	双星与变星研究组中国科学院天体结构与演化重点实验室
作者单位	1.School of Aeronautics, Shandong Jiaotong University, Jinan, China; 2.School of Mathematics and Information Sciences, Yantai University, Yantai, China; 3.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming, China; 4.University of the Chinese Academy of Science, Beijing, China; 5.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, China; 6.China University of Petroleum-Beijing at Karamay, Karamay, 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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