| PHOTOMETRIC STUDY OF THE VERY SHORT PERIOD SHALLOW CONTACT BINARY DD COMAE BERENICES | |
Zhu LY(朱俐颖)1,2 ; Qian SB(钱声帮)1,2; Mikulasek, Z3,4; Zejda, M3; Zverina, P3; Diethelm, R5; Zhu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
| |
| 发表期刊 | ASTRONOMICAL JOURNAL
 |
| 2010-07 | |
| 卷号 | 140期号:1页码:215-223 |
| DOI | 10.1088/0004-6256/140/1/215 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Binaries: Eclipsing Stars: Evolution Stars: Individual (Dd Com) |
| 摘要 | The first photometric solutions of the very short period (VSP) close binary DD Comae Berenices (P = 0(d).26920811) based on our new complete (IR)(C) light curves are derived by the 2003 version Wilson-Van Hamme code. They show that the system belongs to shallow contact W-type W UMa systems with a degree of overcontact of 8.7%. The observed light curve distortions are explained by employing the spots model due to the late-type nature of both components. We have collected all available photometric data about the system with emphasis on the individual observational data, which we treated simultaneously using our own method based on the usage of computed model light curves as templates. We recalculated published times of light minimum and added new ones of our own to construct an O-C diagram that spans over 70 years. Using a least squares method orthogonal quadratic model function, we found that the orbital period of DD Com is continuously increasing with (P) over dot = 0.00401(22) s yr(-1). The period increase may be caused by the mass transfer from the less-massive component to the more-massive one. With the period increase, the binary is evolving from the present shallow contact phase to the broken stage predicted by the thermal relaxation oscillation (TRO) theory. Compared with other VSP systems, DD Com is a rare system that lies on the expanding phase of the TRO cycle. Until now, only four such systems including DD Com are found in this stage. Thus, this target is another good observational proof of the TRO theory in a very short period region. |
| 项目资助者 | Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; Chinese Natural Science Foundation [10973037, 10903026] ; Yunnan Natural Science Foundation [2008CD157] ; National Key Fundamental Research Project [2007CB815406] |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-6256 |
| URL | 查看原文 |
| 归档日期 | 2010-06-12 |
| WOS记录号 | WOS:000278691700020 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | URSAE MAJORIS SYSTEMS ; LIGHT CURVES ; STAR LIGHT ; ECLIPSING BINARY ; ORBITAL PERIOD ; TZ BOOTIS ; EVOLUTION |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5837 |
| 专题 | 双星与变星研究组 中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Zhu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 3.Department of Theoretical Physics and Astrophysics, Masaryk University, Brno, Czech Republic 4.Observatory and Planetarium of J. Palisa, V?B?Technical University, Ostrava, Czech Republic 5.Bahnhofstrasse 3, CH-4118 Rodersdorf, Switzerland |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Zhu LY,Qian SB,Mikulasek, Z,et al. PHOTOMETRIC STUDY OF THE VERY SHORT PERIOD SHALLOW CONTACT BINARY DD COMAE BERENICES[J]. ASTRONOMICAL JOURNAL,2010,140(1):215-223. |
| APA | Zhu LY.,Qian SB.,Mikulasek, Z.,Zejda, M.,Zverina, P.,...&Zhu, L .(2010).PHOTOMETRIC STUDY OF THE VERY SHORT PERIOD SHALLOW CONTACT BINARY DD COMAE BERENICES.ASTRONOMICAL JOURNAL,140(1),215-223. |
| MLA | Zhu LY,et al."PHOTOMETRIC STUDY OF THE VERY SHORT PERIOD SHALLOW CONTACT BINARY DD COMAE BERENICES".ASTRONOMICAL JOURNAL 140.1(2010):215-223. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| PHOTOMETRIC STUDY OF（954KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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。
修改评论