Photometric investigation of the deep-contact binary V409 Hya
文献类型：期刊论文
| 作者 | Na, WW1; Qian SB(钱声帮)2,3,4 ; Zhang, L1; Liao WP(廖文萍)2,3,4; Snoonthornthum, B5; Zhu LY(朱俐颖)2,3,4; Zhao EG(赵二刚)2,3,4; Zhou X(周肖)2,3,4
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| 刊名 | NEW ASTRONOMY
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| 出版日期 | 2014-07 |
| 卷号 | 30页码:105-108 |
| 关键词 | Stars: binaries: close Stars: binaries: eclipsing Stars: individual (V409 Hya) Stars: stellar evolution |
| ISSN号 | 1384-1076 |
| 产权排序 | 第二完成单位 |
| 通讯作者 | Qian, SB (reprint author), Chinese Acad Sci, Yunnan Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | V409 Hya is a newly discovered W UMa-type binary star with a period of 0.47226 days. Complete light curves in V, 12,, and I bands are presented and analyzed with the W-D (Wilson and Devinney) method. It is discovered that V409 Hya is a deep contact binary with a contact degree of integral = 60.6(+/- 1.4)%. It is an A-type, low-mass-ratio contact binary with a mass ratio of 0.22. The derived orbital inclination (i = 89.8 degrees) indicates that it is a total eclipsing binary and the determined parameters are reliable. By combining several determined times of light minimum with the others compiled from the literature, the period changes of V409 Hya were investigated. The general trend of the (O-C) curve reveals that the period of the binary is increasing continuously at a rate of dP/dt = +5.41(+/- 0.06) x 10(-7) days/year. The continuous period increase can be explained by a mass transfer from the secondary to the primary. As the matter is being transferred, the mass ratio of the binary system is decreasing. After it meets the more familiar criterion that the orbital angular momentum is less than 3 times the total spin angular momentum, the deep contact binary may finally evolve into a rapid-rotating single star. (c) 2014 Published by Elsevier B.V. |
| 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] | STAR LIGHT ; SYSTEMS ; CURVES ; CYGNI |
| 收录类别 | SCI |
| 原文出处 | http://www.sciencedirect.com/science/article/pii/S1384107614000165 |
| 语种 | 英语 |
| WOS记录号 | WOS:000333493100013 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5900]  |
| 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.Department of Physics, Yunnan University, 2, Cui Hubei road, 650091 Kunming, Yunnan province, China 2.Yunnan Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, China 4.University of the Chinese Academy of Sciences, Beijing 100049, China 5.National Astronomical Research Institute of Thailand, 191 Siriphanich Bldg., Huay Kaew Rd., Chiang Mai 50200, Thailand |
| 推荐引用方式 GB/T 7714 | Na, WW,Qian SB,Zhang, L,et al. Photometric investigation of the deep-contact binary V409 Hya[J]. NEW ASTRONOMY,2014,30:105-108. |
| APA | Na, WW.,Qian SB.,Zhang, L.,Liao WP.,Snoonthornthum, B.,...&Zhou X.(2014).Photometric investigation of the deep-contact binary V409 Hya.NEW ASTRONOMY,30,105-108. |
| MLA | Na, WW,et al."Photometric investigation of the deep-contact binary V409 Hya".NEW ASTRONOMY 30(2014):105-108. |
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来源：云南天文台
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