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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
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2016-02-01
Volume16Issue:2
DOI10.1088/1674-4527/16/2/035
Contribution Rank第2完成单位
Indexed BySCI
KeywordEclipsing Binaries Stars: Individual (Eu Hya And Aw Vul) The Third Companion
Abstract

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.

Funding ProjectNational Natural Science Foundation of China[11473009] ; National Natural Science Foundation of China[U1131102] ; Open Research Program Foundation[OP 201110]
Funding OrganizationNational Natural Science Foundation of China[11473009, U1131102] ; Open Research Program Foundation[OP 201110]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS IDWOS:000369252500015
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordALGOL-TYPE BINARIES ; ANGULAR-MOMENTUM LOSS ; POSSIBLE MASS ; LIGHT CURVES ; SYSTEMS ; HYDRAE ; STARS ; DELPHINI ; CATALOG ; CANCRI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9327
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorYang, Yuan-Gui; Dai, Hai-Feng
Affiliation1.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
Recommended Citation
GB/T 7714
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.(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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