Mass Transfer and Loss in an Extremely Low-mass-ratio Semidetached Binary with a Pulsating A-type Star
文献类型：期刊论文
| 作者 | Zhang, Hui-Ting2; Qian, Sheng-Bang2; Liao WP(廖文萍)1,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2026-01-20 |
| 卷号 | 997期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae21b9 |
| 产权排序 | 第2完成单位 |
| 文献子类 | Article |
| 英文摘要 | AY Gem is a short-period Algol-type eclipsing binary with a period of 3.05 days that is neglected for spectroscopic and photometric investigations. The first radial-velocity curves have been obtained for AY Gem by using LAMOST medium- and low-resolution spectra together with the BFOSC spectral data observed with the 2.16 m telescope in Xinglong station. It is detected that AY Gem is a double-lined spectroscopic binary with an extremely low mass ratio of q = 0.10 +/- 0.02. Photometric solutions derived by using the TESS data reveal that it is a semidetached binary, and the absolute parameters were determined to be: M1 = 2.02 +/- 0.05 M circle dot, M2 = 0.19 +/- 0.02 M circle dot; R1 = 1.91 +/- 0.03 R circle dot, R2 = 2.37 +/- 0.07 R circle dot. By analyzing the O-C diagram, it is found that the orbital period is decreasing continuously, which can be explained as nonconservative mass transfer with a mass-loss rate of M similar to-10-9M circle dotyr-1 . Meanwhile, it is discovered that AY Gem exhibits a distinct double-peaked H alpha emission line, indicating the presence of a transient disk. This is further supported by the measurement of the equivalent width and the q-r diagram. Furthermore, the primary component is identified as a delta Scuti-type star that pulsates at f18 = 11.29511 days-1 and f19 = 11.37374 days-1. These results suggest that AY Gem is a good astrophysical laboratory for investigating mass transfer and loss, binary evolution, and the effect of tidal forces and mass accretion on stellar pulsations. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | DELTA-SCUTI STARS ; ECLIPSING BINARIES ; ACCRETION DISKS ; ALGOL ; MULTIPLICITY ; CATALOG ; ORBITS ; LIGHT ; SPECTRUM ; REGIONS |
| 资助项目 | China Manned Space Program[CMS-CSST-2025-A16]; International Partnership Program of Chinese Academy of Sciences[020GJHZ2023030GC]; Science Foundation of Yunnan Province[202401AS070046]; Science Foundation of Yunnan Province[202503AP140013]; National Natural Science Foundation of China[12573038]; Graduate Research Innovation Foundation Project of Yunnan University[KC-24249892]; CAS Light of West China Program; NASA Explorer Program; NASA Science Mission Directorate; Chinese Academy of Sciences; Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST) - National Development and Reform Commission; National Astronomical Observatories, Chinese Academy of Sciences; NSF[AST-0407380]; NSF[AST-0909073]; NSF[AST-1313370]; Smithsonian American Women's History Initiative Pool |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001659802700001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | China Manned Space Program[CMS-CSST-2025-A16] ; International Partnership Program of Chinese Academy of Sciences[020GJHZ2023030GC] ; Science Foundation of Yunnan Province[202401AS070046, 202503AP140013] ; National Natural Science Foundation of China[12573038] ; Graduate Research Innovation Foundation Project of Yunnan University[KC-24249892] ; CAS Light of West China Program ; NASA Explorer Program ; NASA Science Mission Directorate ; Chinese Academy of Sciences ; Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST) - National Development and Reform Commission ; National Astronomical Observatories, Chinese Academy of Sciences ; NSF[AST-0407380, AST-0909073, AST-1313370] ; Smithsonian American Women's History Initiative Pool |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28849]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 通讯作者 | Qian, Sheng-Bang |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences (CAS), 396 Yangfangwang, Guandu District, Kunming 650216, People’s Republic of China; 2.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, People’s Republic of China; qiansb@ynu.edu.cn; 3.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, Beijing 101408, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Zhang, Hui-Ting,Qian, Sheng-Bang,Liao WP. Mass Transfer and Loss in an Extremely Low-mass-ratio Semidetached Binary with a Pulsating A-type Star[J]. ASTROPHYSICAL JOURNAL,2026,997(1). |
| APA | Zhang, Hui-Ting,Qian, Sheng-Bang,&廖文萍.(2026).Mass Transfer and Loss in an Extremely Low-mass-ratio Semidetached Binary with a Pulsating A-type Star.ASTROPHYSICAL JOURNAL,997(1). |
| MLA | Zhang, Hui-Ting,et al."Mass Transfer and Loss in an Extremely Low-mass-ratio Semidetached Binary with a Pulsating A-type Star".ASTROPHYSICAL JOURNAL 997.1(2026). |
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来源：云南天文台
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