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Orbital period study of the Algol-type eclipsing binary system TW Draconis
Qian SB(钱声帮)1,3; Boonrucksar, S2; Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊NEW ASTRONOMY
2002-10
卷号7期号:7页码:435-439
DOI10.1016/S1384-1076(02)00167-7
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收录类别SCI ; EI
关键词Stars : Binaries : Close Stars : Individual : Tw Dra Stars : Interiors Stars : Evolution
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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1092
URL查看原文
归档日期2002-12-16
WOS记录号WOS:000178496100004
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]CLOSE BINARIES ; SECONDARIES ; MODULATION
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被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5754
专题双星与变星研究组
通讯作者Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
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
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Qian SB,Boonrucksar, S,Qian, SB . 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,&Qian, SB .(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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