Orbital period study of the Algol-type eclipsing binary system TW Draconis
文献类型：期刊论文
| 作者 | Qian SB(钱声帮)1,3 ; Boonrucksar, S2
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| 刊名 | NEW ASTRONOMY
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| 出版日期 | 2002-10 |
| 卷号 | 7期号:7页码:435-439 |
| 关键词 | stars : binaries : close stars : individual : TW Dra stars : interiors stars : evolution |
| ISSN号 | 1384-1092 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | The century-long times of light minimum of the Algol-type eclipsing binary star, TW Dra (BD + 64degrees1077, Sp A5V + K2III), are investigated by considering a new pattern of period change. Two sudden period increases and two successive period decreases are discovered to superimpose on a rapid secular increase (dP/dt = + 4.43 X 10(-6) days/year). The secular increase may be caused by a dynamical mass transfer from the secondary to the primary component (dm/dt = 6.81 x 10(-7) M-./year) that is in agreement with the semi-detached configuration of the system and with the existence of a hot spot and a gaseous stream in the binary system. The irregular period jumps superimposed on the secular increase can be explained by the structure variation of the K2-type giant via instabilities of the outer convective layer or via magnetic activity cycles. (C) 2002 Elsevier Science 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] | CLOSE BINARIES ; SECONDARIES ; MODULATION |
| 收录类别 | SCI ; EI |
| 原文出处 | http://www.sciencedirect.com/science/article/pii/S1384107602001677 |
| 语种 | 英语 |
| WOS记录号 | WOS:000178496100004 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5754]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, PR China 2.Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand 3.United Laboratory of Optical Astronomy, Chinese Academy photometric elements were determined. Spectroof |
| 推荐引用方式 GB/T 7714 | Qian SB,Boonrucksar, S. Orbital period study of the Algol-type eclipsing binary system TW Draconis[J]. NEW ASTRONOMY,2002,7(7):435-439. |
| APA | Qian SB,&Boonrucksar, S.(2002).Orbital period study of the Algol-type eclipsing binary system TW Draconis.NEW ASTRONOMY,7(7),435-439. |
| MLA | Qian SB,et al."Orbital period study of the Algol-type eclipsing binary system TW Draconis".NEW ASTRONOMY 7.7(2002):435-439. |
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来源：云南天文台
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