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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.
Source PublicationNEW ASTRONOMY
2002-10
Volume7Issue:7Pages:435-439
DOI10.1016/S1384-1076(02)00167-7
Contribution Rank第1完成单位
Indexed BySCI ; EI
KeywordStars : Binaries : Close Stars : Individual : Tw Dra Stars : Interiors Stars : Evolution
AbstractThe 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.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN1384-1092
URL查看原文
Archive Date2002-12-16
WOS IDWOS:000178496100004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCLOSE BINARIES ; SECONDARIES ; MODULATION
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5754
Collection双星与变星研究组
Corresponding AuthorQian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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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