The highest rate orbital period increasing contact binary LP UMa revisited
文献类型：期刊论文
| 作者 | Guo, D. -F.1; Li, K.1,2 ; Hu, S. -M.1; Jiang, Y. -G.1; Gao, D. -Y.1; Chen, X.1
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| 刊名 | NEW ASTRONOMY
 |
| 出版日期 | 2016-04 |
| 卷号 | 44页码:29-34 |
| ISSN号 | 1384-1076 |
| 关键词 | Stars: binaries: close Stars: binaries: eclipsing Stars: individual (LP UMa) |
| 通讯作者 | Li, K (reprint author), Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China. |
| 英文摘要 | Complete BV(RI)(c) photometry for the contact binary LP UMa was derived on 2015 February 23 using the 1.0 m telescope at Weihai Observatory of Shandong University. By compiling 66 newly determined times of light minimum with those published in the literature, we investigated the orbital period variation of this binary star. A possible cyclic variation, with a period of 14.84 years and an amplitude of 0.0031 days, was discovered to be superimposed on a long-term period increase (9.32 s century(-1)). The highest rate of orbital period increase was confirmed, which can be explained by the mass transfer from the less massive component to the more massive one. The cyclic period oscillation was possibly caused by the light travel time effect due to the presence of a third body. The multiple light curves were simultaneously analysed using the W-D program. It was found that LP UMa has a mass ratio of q = 0.331, a contact degree off = 7.9%, and the temperature difference between the two components was only about 90 K, which are quite different with the previous results. A hot spot on the primary component was employed to explain the asymmetric light curve of this binary.(C) 2015 Elsevier B.V. All rights reserved. |
| 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] | URSAE MAJORIS SYSTEMS ; LIGHT CURVES ; STARS ; EVOLUTION ; CYGNI |
| 收录类别 | SCI |
| 原文出处 | http://www.sciencedirect.com/science/article/pii/S1384107615001220 |
| 语种 | 英语 |
| WOS记录号 | WOS:000366069900005 |
| 公开日期 | 2016-06-01 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9386]  |
| 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.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, China |
| 推荐引用方式 GB/T 7714 | Guo, D. -F.,Li, K.,Hu, S. -M.,et al. The highest rate orbital period increasing contact binary LP UMa revisited[J]. NEW ASTRONOMY,2016,44:29-34. |
| APA | Guo, D. -F.,Li, K.,Hu, S. -M.,Jiang, Y. -G.,Gao, D. -Y.,&Chen, X..(2016).The highest rate orbital period increasing contact binary LP UMa revisited.NEW ASTRONOMY,44,29-34. |
| MLA | Guo, D. -F.,et al."The highest rate orbital period increasing contact binary LP UMa revisited".NEW ASTRONOMY 44(2016):29-34. |
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来源：云南天文台
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