PHOTOMETRIC STUDY OF THE VERY SHORT PERIOD SHALLOW CONTACT BINARY DD COMAE BERENICES
文献类型：期刊论文
| 作者 | Zhu LY(朱俐颖)1,2 ; Qian SB(钱声帮)1,2; Mikulasek, Z3,4; Zejda, M3; Zverina, P3; Diethelm, R5
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2010-07 |
| 卷号 | 140期号:1页码:215-223 |
| 关键词 | binaries: eclipsing stars: evolution stars: individual (DD Com) |
| ISSN号 | 0004-6256 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Zhu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | 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. |
| 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] | URSAE MAJORIS SYSTEMS ; LIGHT CURVES ; STAR LIGHT ; ECLIPSING BINARY ; ORBITAL PERIOD ; TZ BOOTIS ; EVOLUTION |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/1538-3881/140/1/215/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000278691700020 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5837]  |
| 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, 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 |
| 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,&Diethelm, R.(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. |
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来源：云南天文台
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