Long-term photometric behavior and orbital period variations in the supersoft X-ray source V617 Sgr
文献类型:期刊论文
作者 | Zang L(臧蕾)5,6,7; Zhao EG(赵二刚)4,5,6,7; Fernández-Lajús, Eduardo1,3; Zubairi, Ahmed Waqas5,6,7; Sarotsakulchai, Nopphadon2 |
刊名 | NEW ASTRONOMY |
出版日期 | 2023-10 |
卷号 | 103 |
ISSN号 | 1384-1076 |
关键词 | Binaries Close - binaries Eclipsing - stars Evolution - stars Individual (V617 sgr) |
DOI | 10.1016/j.newast.2023.102054 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | V617 Sgr is one of the Galactic counterparts of supersoft X-ray sources as a member of the V Sagittae class, where a massive white dwarf is accreting material from its stellar companion and forming an accretion disk. Since 2014, we have monitored it for about nine years with the 2.15 m telescope at CASLEO. It is found that the light curve shows obviously fluctuations and flickering, which imply the presence of active hot-spots on the accretion disk. Meanwhile, the flat-bottomed depressions can be explained by the presence of circumbinary material. By collecting all available eclipse times from the literature together with 149 newly determined times of light minimum, we constructed the O-C diagram and analyzed the variations in the orbital period of the eclipsing binary V617 Sgr. It is confirmed that the orbital period is increasing continuously with a rate of P = +1.68(3) x 10-7 d yr-1. A cyclic variation is detected to be superimposed on the period increase with an amplitude of 4.6 min and a period of 26 yr. The continuous period increase is largely due to mass transfer from the donor secondary on its Kelvin-Helmholtz time-scale, while wind mass loss from the accretion disk surrounding the white dwarf may also contribute on the period change. In this case, the mass-transfer rate of V617 Sgr is estimated to be in the range of about 0.575 x 10-6 to 2.25 x 10-6 M AE yr-1 and the mass-accretion rate is less than 1.59 x 10-6 M AE yr-1. The cyclic change can be explained by the presence of a third body or magnetic activity cycles of the secondary. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS |
WOS关键词 | V-SAGITTAE ; SPECTROSCOPY ; BINARY ; VARIABILITY ; MODULATION ; STARS |
资助项目 | National Key R&D Program of China[2022YFE0116800] ; National Natural Science Foundation of China[11933008] ; basic research project of Yunnan Province[202201AT070092] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:001009010500001 |
资助机构 | National Key R&D Program of China[2022YFE0116800] ; National Natural Science Foundation of China[11933008] ; basic research project of Yunnan Province[202201AT070092] |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26093] |
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 | Zang L(臧蕾) |
作者单位 | 1.Instituto de Astrofísica de La Plata (CCT La Plata–CONICET/UNLP), B1900FWA, La Plata, Argentina; 2.National Astronomical Research Institute of Thailand, 260 Moo 4, T. Donkaew, A. Maerim, Chiangmai 50180, Thailand 3.Facultad de Ciencias Astronómicas y Geofísicas–Universidad Nacional de La Plata, Paseo del Bosque S/N–B1900FWA, La Plata, Argentina; 4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, PR China; 5.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, 101408, Beijing, PR China; 6.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650216 Kunming, PR China; 7.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650216 Kunming, PR China; |
推荐引用方式 GB/T 7714 | Zang L,Zhao EG,Fernández-Lajús, Eduardo,et al. Long-term photometric behavior and orbital period variations in the supersoft X-ray source V617 Sgr[J]. NEW ASTRONOMY,2023,103. |
APA | Zang L,Zhao EG,Fernández-Lajús, Eduardo,Zubairi, Ahmed Waqas,&Sarotsakulchai, Nopphadon.(2023).Long-term photometric behavior and orbital period variations in the supersoft X-ray source V617 Sgr.NEW ASTRONOMY,103. |
MLA | Zang L,et al."Long-term photometric behavior and orbital period variations in the supersoft X-ray source V617 Sgr".NEW ASTRONOMY 103(2023). |
入库方式: OAI收割
来源:云南天文台
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