Photometric investigations of three short-period binary systems: GSC 0763-0572, RR Centauri, and epsilon Coronae Australis

	Photometric investigations of three short-period binary systems: GSC 0763-0572, RR Centauri, and epsilon Coronae Australis
	Yang YG(杨远贵)1,2,3 ; Qian SB(钱声帮)1,2 ; Zhu LY(朱俐颖)1,2,3 ; He JJ(何家佳)1,2,3 ; Yuan JZ(袁金照)1,2,3
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2005
卷号	57 期号:6 页码:983-993
关键词	stars : binaries : close stars : binaries : eclipsing stars : individuals (GSC 0763-0572, RR Centauri, epsilon Coronae Australis)
ISSN号	0004-6264
通讯作者	Yang, YG (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	CCD photometric observations of the short-period eclipsing binary GSC 0763-0572 were carried out in the B and V bands at Yunnan Observatory in China. Three light minimum times were determined from the observations and the orbital period of this system was revised. Photometric solutions for three W UMa-type stars (i.e., GSC 0763-0572, RR Cen, and is an element of CrA) were deduced by the 2003 version of the Wilson-Devinney code with and without third lights. All three systems are found to be A-type eclipsing binaries with low mass ratios. Combining with the radial-velocity curves for RR Cen (King, Hilditch 1984, MNRAS, 209, 645) and is an element of CrA (Goecking, Duerbeck 1993, A&A, 278, 463), the absolute parameters for those two binaries were redetermined. Based on all minimum times of RR Cen, it is found that the orbital period shows a long-term increase superimposed on a cyclic variation. The secular change with a rate of dP/dt = + 1.21 X 10(-7) d yr(-1) may suggest that RR Cen is undergoing mass transfer from the secondary component to the primary one with dm/dt = +3.12 x 10(-8) M-circle dot yr(-1). The cyclic oscillation with a period of 65.1(+/- 0.4)yr and an amplitude of 0.0124(+/- 0.0007)d may be explained by the presence of a third body, which can be identified by the revised photometric solution. It is believed that if the orbital period increases for those systems is true, this kind of binary may evolve into a rapid-rotating single star.
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]	URSAE MAJORIS SYSTEMS ; OVERCONTACT BINARY ; LIGHT CURVES ; PHOTOELECTRIC PHOTOMETRY ; AUSTRINAE ; STARS ; CONTACT ; MODELS ; HYDRAE ; DEEP
收录类别	SCI
原文出处	http://pasj.oxfordjournals.org/content/57/6/983
语种	英语
WOS记录号	WOS:000234607000012
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5784]
专题	云南天文台_双星与变星研究组
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, 650011 Kunming, P. R. China 2.United Laboratory of Optical Astronomy, CAS (ULOAC), Beijing, P. R. China 3.Graduate School of the Chinese Academy of Sciences, 100039 Beijing, P. R. China
推荐引用方式 GB/T 7714	Yang YG,Qian SB,Zhu LY,et al. Photometric investigations of three short-period binary systems: GSC 0763-0572, RR Centauri, and epsilon Coronae Australis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2005,57(6):983-993.
APA	Yang YG,Qian SB,Zhu LY,He JJ,&Yuan JZ.(2005).Photometric investigations of three short-period binary systems: GSC 0763-0572, RR Centauri, and epsilon Coronae Australis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,57(6),983-993.
MLA	Yang YG,et al."Photometric investigations of three short-period binary systems: GSC 0763-0572, RR Centauri, and epsilon Coronae Australis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 57.6(2005):983-993.