PHOTOMETRIC INVESTIGATION OF THE TOTALLY ECLIPSING CONTACT BINARY V12 IN THE INTERMEDIATE-AGE OPEN CLUSTER NGC 7789
文献类型：期刊论文
| 作者 | Qian SB(钱声帮)1,2,3 ; Essam, A4; Wang JJ(王晶晶)1,2,3; Ali, GB4; Liu L(刘亮)1,2,3; Haroon, AA4,5; Zhou X(周肖)1,2,3
|
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2015-02 |
| 卷号 | 149期号:2 |
| 关键词 | binaries: close binaries: eclipsing stars: evolution stars: individual (V12 in NGC 7789) |
| 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, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | NGC 7789 is an intermediate-age open cluster with an age similar to the mean age of contact binary stars. V12 is a bright W UMa-type binary star with an orbital period of 0.3917 days. The first complete light curves of V12 in the V, R, and I bands are presented and analyzed with the Wilson-Devinney (W-D) method. The results show that V12 is an intermediate-contact binary (f = 43.0(+/- 2.2)%) with a mass ratio of 3.848, and it is a W-type contact binary where the less massive component is slightly hotter than the more massive one. The asymmetry of the light curves is explained by the presence of a dark spot on the more massive component. The derived orbital inclination (i = 83 degrees.6) indicates that it is a totally eclipsing binary, which suggests that the determined parameters are reliable. The orbital period may show a long-term increase at a rate of (P)over dot = +2.48(+/- 0.17) x 10(-6) days yr(-1). that reveals a rapid mass transfer from the less massive component to the more massive one. However, more observations are needed to confirm this conclusion. The presence of an intermediate-contact binary in an intermediate-age open cluster may suggest that some contact binaries have a very short pre-contact timescale. The presence of a third body and/or stellar collision may help to shorten the pre-contact evolution. |
| 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] | MAJORIS TYPE BINARIES ; VARIABLE-STARS ; MASS-TRANSFER ; CLOSE-BINARY ; LIGHT CURVES ; FIELD ; EVOLUTION ; NGC-7789 ; CATALOG ; SYSTEMS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-6256/149/2/38/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000349360200003 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5922]  |
| 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.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, China 2.Key Laboratory of the Structure and Evolution of Celestial Bodies, 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 4.National Research Institute of Astronomy and Geophysics, Department of Astronomy, Helwan, Cairo, Egypt 5.Astronomy Department, Faculty of Science, King Abdul Aziz University, Jeddah, Saudi Arabia |
| 推荐引用方式 GB/T 7714 | Qian SB,Essam, A,Wang JJ,et al. PHOTOMETRIC INVESTIGATION OF THE TOTALLY ECLIPSING CONTACT BINARY V12 IN THE INTERMEDIATE-AGE OPEN CLUSTER NGC 7789[J]. ASTRONOMICAL JOURNAL,2015,149(2). |
| APA | Qian SB.,Essam, A.,Wang JJ.,Ali, GB.,Liu L.,...&Zhou X.(2015).PHOTOMETRIC INVESTIGATION OF THE TOTALLY ECLIPSING CONTACT BINARY V12 IN THE INTERMEDIATE-AGE OPEN CLUSTER NGC 7789.ASTRONOMICAL JOURNAL,149(2). |
| MLA | Qian SB,et al."PHOTOMETRIC INVESTIGATION OF THE TOTALLY ECLIPSING CONTACT BINARY V12 IN THE INTERMEDIATE-AGE OPEN CLUSTER NGC 7789".ASTRONOMICAL JOURNAL 149.2(2015). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。