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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; Yang, YG (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2005
卷号57期号:6页码:983-993
产权排序第1完成单位
收录类别SCI
关键词Stars : Binaries : Close Stars : Binaries : Eclipsing Stars : Individuals (Gsc 0763-0572 Rr Centauri Epsilon Coronae Australis)
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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2006-02-22
WOS记录号WOS:000234607000012
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]URSAE MAJORIS SYSTEMS ; OVERCONTACT BINARY ; LIGHT CURVES ; PHOTOELECTRIC PHOTOMETRY ; AUSTRINAE ; STARS ; CONTACT ; MODELS ; HYDRAE ; DEEP
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5784
专题双星与变星研究组
通讯作者Yang, YG (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
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
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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,&Yang, YG .(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.
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