Multiple color light curves and period changes investigation of the contact binary HV Aqr
文献类型：期刊论文
| 作者 | Li K(李凯)1,2,3 ; Qian SB(钱声帮)1,2,3
|
| 刊名 | NEW ASTRONOMY
 |
| 出版日期 | 2013-07 |
| 卷号 | 21页码:46-49 |
| 关键词 | Stars: binaries: close Stars: binaries: eclipsing Stars: individuals: HV Aqr |
| ISSN号 | 1384-1076 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Li, K (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | New V, R and I light curves of the short period binary system, HV Aqr, are presented. Photometric solutions were derived using the Wilson-Devinney code. Our new determined light curves do not show O'Connell effect. The nearly symmetry and complete eclipses of the light curves of HV Aqr enable us to determine high-precision photometric parameters of the binary system. The new solutions suggest that HV Aqr is a low mass ratio (q = 0.1455) deep contact binary with a contact degree off = 55.9%. Based on all available times of light minimum, we analyzed the long-term period changes of HV Aqr. A secular decrease rate of dP/dt = 8.84(+/- 0.18) x 10(-8) days yr(-1) was determined. The continuous period decrease can be explained by the mass transfer from the primary component to the secondary and angular momentum loss via magnetic stellar wind. A conservative mass transfer rate of dM(1)/dt = 1.81 x 10(-8)M(circle dot) yr(-1) and angular momentum loss rate at dJ/dt = 5.96 x 10(48) g cm(2) s(-1) yr(-1) were derived. As the orbital period decreases, the contact degree of HV Aqr will become deeper and finally it will evolve into a single rapid-rotation star. (C) 2012 Elsevier B.V. All rights reserved. |
| 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 ; STARS |
| 收录类别 | SCI |
| 原文出处 | http://www.sciencedirect.com/science/article/pii/S1384107612001133 |
| 语种 | 英语 |
| WOS记录号 | WOS:000314558400008 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5886]  |
| 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, PR China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences. Graduate School of the CAS, 100049 Beijing, PR China 3.Graduate School of the CAS, 100049 Beijing, PR China |
| 推荐引用方式 GB/T 7714 | Li K,Qian SB. Multiple color light curves and period changes investigation of the contact binary HV Aqr[J]. NEW ASTRONOMY,2013,21:46-49. |
| APA | Li K,&Qian SB.(2013).Multiple color light curves and period changes investigation of the contact binary HV Aqr.NEW ASTRONOMY,21,46-49. |
| MLA | Li K,et al."Multiple color light curves and period changes investigation of the contact binary HV Aqr".NEW ASTRONOMY 21(2013):46-49. |
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来源：云南天文台
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