| An orbital period study of the WUMa-type binary RZ Comae Berenicis | |
Qian SB(钱声帮)1,2 ; He JJ(何家佳)2; Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
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| Source Publication | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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| 2005 | |
| Volume | 57Issue:6Pages:977-982 |
| Contribution Rank | 第1完成单位 |
| Indexed By | SCI |
| Keyword | Stars : Binaries : Close Stars : Binaries : Eclipsing Stars : Individual (Rz Comae Berenicis) |
| Abstract | New photoelectric and CCD photometry observations of a short-period W UMa-type binary system, RZ Com, are presented. The light curves of Broglia (1960, Contr. Milano-Merate, 165) were symmetric in V band, while the present light curve shows a typical O'Connell effect, with Maximum I brighter than Maximum II by 0.015 mag. It is found that the light curve of the binary star has changed from W-subtype to A-subtype according to Binnendijk's classification. This variation may be caused by the activity of dark spot on the primary component. Combining four newly determined times of the light minimum with others published in the literature, the orbital period change of the system was investigated. A small-amplitude oscillation (A = 0.0058 d), with a period of 44.8 yr has been discovered to be superimposed on a long-term period increase with a rate of dP/dt = +4.12 x 10(-8) d yr(-1). The period oscillation can be explained either by the light-time effect via the presence of an unseen third body or by magnetic-activity cycles of the components. The mass ratio of RZ Com is q = 0.43. The secular period variation is in agreement with the conclusions of Qian (2001, MNRAS, 328, 914; 2003, MNRAS, 342, 1260). This indicates that it is on the TRO-controlled stage of the evolutionary scheme proposed by Qian. |
| Language | 英语 |
| Subject Area | Astronomy & Astrophysics |
| Subtype | Article |
| ISSN | 0004-6264 |
| URL | 查看原文 |
| Archive Date | 2005-12-21 |
| WOS ID | WOS:000234607000011 |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS Keyword | THERMAL RELAXATION OSCILLATION ; URSAE MAJORIS SYSTEMS ; CONTACT BINARIES ; LIGHT VARIATION ; CLOSE BINARIES ; AM LEONIS ; MODULATION ; ELEMENTS ; BOOTIS ; CURVE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ynao.ac.cn/handle/114a53/5783 |
| Collection | 双星与变星研究组 |
| Corresponding Author | Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| Affiliation | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, P. R. China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), 100012 Beijing, P. R. China |
| First Author Affilication | Yunnan Observatories, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Qian SB,He JJ,Qian, SB . An orbital period study of the WUMa-type binary RZ Comae Berenicis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2005,57(6):977-982. |
| APA | Qian SB,He JJ,&Qian, SB .(2005).An orbital period study of the WUMa-type binary RZ Comae Berenicis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,57(6),977-982. |
| MLA | Qian SB,et al."An orbital period study of the WUMa-type binary RZ Comae Berenicis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 57.6(2005):977-982. |
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| An Orbital Period St（271KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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