Period studies and photometric models for two EB-type binaries EU Hya and AW Vul

CORC > 云南天文台 > 中国科学院云南天文台 > 中国科学院天体结构与演化重点实验室

	Period studies and photometric models for two EB-type binaries EU Hya and AW Vul
	Yang, Yuan-Gui1,2 ; Li, Qun 1; Li, Hua-Li 3; Dai, Hai-Feng 1,2
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2016-02-01
卷号	16 期号:2
关键词	eclipsing binaries stars: individual (EU Hya and AW Vul) the third companion
ISSN号	1674-4527
产权排序	第二完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ALGOL-TYPE BINARIES ; ANGULAR-MOMENTUM LOSS ; POSSIBLE MASS ; LIGHT CURVES ; SYSTEMS ; HYDRAE ; STARS ; DELPHINI ; CATALOG ; CANCRI
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/1674-4527/16/2/035/meta
语种	英语
WOS记录号	WOS:000369252500015
公开日期	2016-05-17
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9327]
专题	云南天文台_中国科学院天体结构与演化重点实验室
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
推荐引用方式 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).