Photometric analysis on RZ Horologii: An evolved and active Algol with a delta Scuti component
文献类型:期刊论文
作者 | Zhang HT(张慧亭)1,2,4; Qian SB(钱声帮)1,2,3,4; Liao WP(廖文萍)1,2,3,4 |
刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN |
出版日期 | 2023-05-16 |
ISSN号 | 0004-6264 |
关键词 | binaries: eclipsing stars: activity stars: variables: delta Scuti techniques: photometric |
DOI | 10.1093/pasj/psad033 |
产权排序 | 第1完成单位 |
文献子类 | Article; Early Access |
英文摘要 | RZ Hor (TIC 31653503) is a long-period (P = 6.68 d) EA-type eclipsing binary that exhibits both chromospheric activity and oscillation. The physical properties of RZ Hor are determined with binary modelling for the first time. It is found that it has a semi-detached configuration with a low mass ratio of q = 0.1606(13), where the secondary component is filled with its Roche lobe. By analyzing all available eclipse times, it is shown that the orbital period of RZ Hor is decreasing at a rate of dP/dt=-5.48 x 10(-6) dyr(-1). In a typical Algol, a rapid mass transfer from the secondary to the primary should cause the orbital period to be increasing and then the secondary will be temporarily detached from the critical Roche lobe. The present configuration reveals that RZ Hor has undergone a rapid mass transfer and the period decrease can be explained by magnetic stellar wind. We estimate the rate of mass loss initially to be 10(-8) M-circle dot yr(-1) < vertical bar(M) over dot vertical bar < 10(-6) M-circle dot yr(-1). The variations and the asymmetries of the light curve are interpreted by adding a migrating cool spot on the surface of the late-type secondary. After subtracting the eclipsing changes from the light curve data, we analyzed the pulsation in the light residuals. Twenty-five frequencies of signal-to-noise amplitude ratio (S/N) larger than 5.2, including four multiples of tidally split frequencies, were detected. A total of 17 independent frequencies containing 2 radial modes, and 10 non-radial p modes were identified. All the investigations suggest that RZ Hor is an evolved Algol-type binary with a delta Sct-type primary and an active secondary. |
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 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
WOS关键词 | BINARY STAR LIGHT ; MASS-TRANSFER ; EVOLUTION ; SYSTEM ; PULSATION ; CATALOG ; HELIUM ; MODELS ; DRA |
资助项目 | National Natural Science Foundation of China[11933008] ; National Natural Science Foundation of China[11873017] ; NASA Explorer Program ; Association of Universities for Research in Astronomy, Inc |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000989719000001 |
资助机构 | National Natural Science Foundation of China[11933008, 11873017] ; NASA Explorer Program ; Association of Universities for Research in Astronomy, Inc |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26085] |
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 |
通讯作者 | Qian SB(钱声帮) |
作者单位 | 1.University of Chinese Academy of Sciences, No. 1 Yanqihu East Rd, Huairou District, Beijing 101408, P.R. China; 2.Yunnan Observatories, Chinese Academy of Sciences (CAS), 396 yangfangwang, Guandu District, Kunming 650216, P.R. China; 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, P.R. China 4.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, P.R. China; |
推荐引用方式 GB/T 7714 | Zhang HT,Qian SB,Liao WP. Photometric analysis on RZ Horologii: An evolved and active Algol with a delta Scuti component[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2023. |
APA | Zhang HT,Qian SB,&Liao WP.(2023).Photometric analysis on RZ Horologii: An evolved and active Algol with a delta Scuti component.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN. |
MLA | Zhang HT,et al."Photometric analysis on RZ Horologii: An evolved and active Algol with a delta Scuti component".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN (2023). |
入库方式: OAI收割
来源:云南天文台
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