Magnetic activity and orbital periods of five low-mass eclipsing binaries
文献类型：期刊论文
| 作者 | Zhang, Li-Yun1,2 ; Pi, Qing-feng1,2; Yang, Yuan-Gui3
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2014-08-11 |
| 卷号 | 442期号:3页码:2620-2636 |
| ISSN号 | 0035-8711 |
| 关键词 | binaries: eclipsing stars: individual: NSVS 02502726 stars: individual: NSVS 06550671 stars: individual: NSVS 11868841 stars: individual: NSVS 07453183 stars: individual: NSVS 10653195 |
| 通讯作者 | hang, LY (reprint author), Guizhou Univ, Coll Sci, Dept Phys, Guiyang 550025, Peoples R China. |
| 英文摘要 | We report 15 new VRI light curves of five low-mass eclipsing binaries (NSVS 02502726, NSVS 07453183, NSVS 11868841, NSVS 06550671 and NSVS 10653195) that were observed between 2010 and 2012. We analysed our new data together with three published spectroscopic observations and seven published light curves using a modified version of the Wilson-Devinney program. Orbital solutions of the five low-mass eclipsing binaries were revised and new star-spot parameters were obtained. We found that spot locations on the five low-mass eclipsing binaries changed over several years. However, the star-spots for NSVS 07453183 and NSVS 06550671 were stable for several months. More interestingly, for NSVS 02502726, the spots within a star-spot longitude region of 180A degrees-360A degrees indicated a magnetic activity cycle of 5.9(+/- 0.2) yr. Moreover, we detected the first flare-like event on NSVS 07453183 at phase 0.39. The observations of the chromospheric activity indicators (H beta and H gamma lines) revealed that NSVS 10653195 and NSVS 06550671 were active. For NSVS 02502726, we found a weak continuous secular decrease at a smaller rate of dp/dt = -2.1(0.8) x 10(-7) d yr(-1) than the previous result. For NSVS 07453183, the O-C times appeared to increase at cycle 6000, and this was followed by a decrease at cycle 6500. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | RS-CANUM-VENATICORUM ; TERM STARSPOT EVOLUTION ; ACTIVITY CYCLE ; CHROMOSPHERIC ACTIVITY ; ABSOLUTE DIMENSIONS ; RT ANDROMEDAE ; YY GEMINORUM ; H-ALPHA ; DIFFERENTIAL ROTATION ; CIRCUMSTELLAR MATTER |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/442/3/2620 |
| 语种 | 英语 |
| WOS记录号 | WOS:000339924300055 |
| 公开日期 | 2016-06-01 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9438]  |
| 专题 | 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, College of Science, Guizhou University and NAOC-GZU-Sponsored Center for Astronomy, Guizhou University, Guiyang 550025, People's Republic of China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China 3.School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, Anhui Province, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Zhang, Li-Yun,Pi, Qing-feng,Yang, Yuan-Gui. Magnetic activity and orbital periods of five low-mass eclipsing binaries[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,442(3):2620-2636. |
| APA | Zhang, Li-Yun,Pi, Qing-feng,&Yang, Yuan-Gui.(2014).Magnetic activity and orbital periods of five low-mass eclipsing binaries.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,442(3),2620-2636. |
| MLA | Zhang, Li-Yun,et al."Magnetic activity and orbital periods of five low-mass eclipsing binaries".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 442.3(2014):2620-2636. |
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来源：云南天文台
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