An orbital period study of the WUMa-type binary RZ Comae Berenicis
文献类型：期刊论文
| 作者 | Qian SB(钱声帮)1,2 ; He JJ(何家佳)2
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2005 |
| 卷号 | 57期号:6页码:977-982 |
| 关键词 | stars : binaries : close stars : binaries : eclipsing stars : individual (RZ Comae Berenicis) |
| ISSN号 | 0004-6264 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | THERMAL RELAXATION OSCILLATION ; URSAE MAJORIS SYSTEMS ; CONTACT BINARIES ; LIGHT VARIATION ; CLOSE BINARIES ; AM LEONIS ; MODULATION ; ELEMENTS ; BOOTIS ; CURVE |
| 收录类别 | SCI |
| 原文出处 | http://pasj.oxfordjournals.org/content/57/6/977 |
| 语种 | 英语 |
| WOS记录号 | WOS:000234607000011 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5783]  |
| 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, 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 |
| 推荐引用方式 GB/T 7714 | Qian SB,He JJ. 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.(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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来源：云南天文台
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