THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi
文献类型：期刊论文
| 作者 | Qian SB(钱声帮)1,2,3 ; Li K(李凯)1,2,3; Liao WP(廖文萍)1,2; Liu L(刘亮)1,2,3; Zhu LY(朱俐颖)1,2; He JJ(何家佳)1,2; Wang JJ(王晶晶)1,2,3; Zhao EG(赵二刚)1,2
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2013-04 |
| 卷号 | 145期号:4 |
| 关键词 | binaries: close binaries: eclipsing stars: evolution stars: individual (UZ UMi) |
| ISSN号 | 0004-6256 |
| 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 | UZ CMi was a W-UMa-type binary star found more than 80 years ago. However, it has been neglected in photometric investigations. Here, the first complete light curves in the B, V, R, and I bands are presented and analyzed using the Wilson and Devinney method. It is discovered that UZ CMi is a contact binary (f = 38.4(+/- 2.3)%) with amass ratio of 0.45. The derived orbital inclination (i = 87 degrees) indicates that it is a total eclipsing binary, which suggests that the determined parameters are reliable. By using 17 new eclipse times together with those collected from the literature, we found that the general trend of the observed-calculated (O - C) curve shows an upward parabolic variation that corresponds to a long-term increase in the orbital period at a rate of (P) over dot = +4.1 x 10(-8) days yr(-1). The continuous increase may be caused by a mass transfer from the less massive component to the more massive one. This suggests that UZ CMi is in the thermal relaxation oscillation controlled stage of the evolutionary scheme proposed by Qian. UZ CMi will oscillate around a critical mass ratio and the contact configuration cannot be broken. After the upward parabolic change was removed, the (O - C)(2) curve of the photoelectric and charge-coupled device data revealed a cyclic variation with a small amplitude of 0.0026 days and a period of 21.1 yr. The cyclic change was analyzed for the light-travel time effect via the presence of an extremely cool stellar companion. |
| 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 ; MASS-RATIO ; LIGHT CURVES ; CONTACT ; CATALOG ; CANCRI ; CYGNI ; DEEP |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-6256/145/4/91/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000316247300005 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5889]  |
| 专题 | 云南天文台_双星与变星研究组 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.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, China 2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, China |
| 推荐引用方式 GB/T 7714 | Qian SB,Li K,Liao WP,et al. THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi[J]. ASTRONOMICAL JOURNAL,2013,145(4). |
| APA | Qian SB.,Li K.,Liao WP.,Liu L.,Zhu LY.,...&Zhao EG.(2013).THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi.ASTRONOMICAL JOURNAL,145(4). |
| MLA | Qian SB,et al."THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR UZ CMi".ASTRONOMICAL JOURNAL 145.4(2013). |
入库方式： OAI收割
来源：云南天文台
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