Period studies and photometric models for two EB-type binaries EU Hya and AW Vul
Yang, Yuan-Gui1,2; Li, Qun1; Li, Hua-Li3; Dai, Hai-Feng1,2; Yang, YG; Dai, HF
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2016-02-01
卷号16期号:2
DOI10.1088/1674-4527/16/2/035
产权排序第2完成单位
收录类别SCI
关键词Eclipsing Binaries Stars: Individual (Eu Hya And Aw Vul) The Third Companion
摘要New photometry for two Algol-type binaries, EU Hya (P = 0.7782 d) and AW Vul (P = 0.8065 d), was carried out using the 60-cm telescope at Xinglong station of National Astronomical Observatories, Chinese Academy of Sciences. With the updated Wilson-Devinney code, photometric elements were derived from the multi-color light curves. The modeled results indicate that the two systems are near-contact binaries, whose secondary components fill their Roche lobes. The fill-out factors of the primaries are f(p) = 81.2 (+/- 0.2) % for EU Hya and f(p) = 82.4 (+/- 0.3) % for AW Vul. Period analysis implies that there exists a downward parabola with a light-time orbit from the (O - C) curve. This kind of periodic oscillation may be attributed to the light-time orbit effect of a third companion. The long-term period decrease may be caused by mass and angular momentum loss. When the orbital period decreases, the fill-out factor of f(p) will increase. Our results indicate that the primaries will also eventually fill their Roche lobes. EU Hya and AW Vul may possibly evolve from semi-detached binaries into contact ones.
项目资助者National Natural Science Foundation of China (11473009, U1131102) ; Open Research Program Foundation(OP 201110)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1674-4527
URL查看原文
WOS记录号WOS:000369252500015
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ALGOL-TYPE BINARIES ; ANGULAR-MOMENTUM LOSS ; POSSIBLE MASS ; LIGHT CURVES ; SYSTEMS ; HYDRAE ; STARS ; DELPHINI ; CATALOG ; CANCRI
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9327
专题中国科学院天体结构与演化重点实验室
通讯作者Yang, YG; Dai, HF
作者单位1.School of Physics and Electronic Information/Information College, Huaibei Normal University, Huaibei 235000, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
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Yang, Yuan-Gui,Li, Qun,Li, Hua-Li,et al. Period studies and photometric models for two EB-type binaries EU Hya and AW Vul[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(2).
APA Yang, Yuan-Gui,Li, Qun,Li, Hua-Li,Dai, Hai-Feng,Yang, YG,&Dai, HF.(2016).Period studies and photometric models for two EB-type binaries EU Hya and AW Vul.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(2).
MLA Yang, Yuan-Gui,et al."Period studies and photometric models for two EB-type binaries EU Hya and AW Vul".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.2(2016).
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