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Search for close binary stars during different key stages of the evolutionary track from detached to overcontact configurations
Qian SB(钱声帮); Soonthornthum, B; 朱俐颖Y; He JJ(何家佳); Dai ZB(戴智斌); Liu L(刘亮); Zhang, J; Liao WP(廖文萍); Qian, SB (reprint author), Chinese Acad Sci, Natl Observatories Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
会议录名称ASTRONOMICAL SOCIETY OF THE PACIFIC (ASP) CONFERENCE SERIES - Seventh Pacific Rim Conference on Stellar Astrophysics
2007
卷号362
页码63-67
产权排序第1完成单位
收录类别CPCI
会议名称7th Pacific Rim Conference on Stellar Astrophysics
会议日期2005-11-15
会议地点Seoul, SOUTH KOREA
摘要Search for and detailed studies of close binary stars during key evolutionary stages, e.g., semidetached with a lobe-filing primary, marginal contact, and newly formed overcontact systems, are very important to understand the formation and dynamical evolution of overcontact binary stars. We have started a series of photometric studies of those kinds of systems. New observations of 14 sample stars have been obtained. Here, we report preliminary results for several sample stars - GSC3658-0076, HL Aur, BL And, GW Tau, DM Del and RV Psc. Five systems - HL Aur, BL And, GW Tau, DM Del and RV Psc - have shown a continuous period decrease. Photometric solutions indicate that BL And and DM Del are semidetached system where the primary components are filling the critical Roche Lobe, while RV Psc and GW Tau are marginal contact systems. The long-time period decreases, the geometrical structures, and the astrophysical parameters of those binary systems all suggest that they are evolving from semidetached (e.g., DM Del and BL And) to marginal contact (already achieved by RV Psc and GW Tau). The period variations of HL Aur suggest that it may be a pre-contact system with a solar-mass companion. Though the times of light minimum of GSC3658-0076 are insufficient to reveal any period changes, our solution indicates that it is at the beginning of mass transfer.
项目资助者Sejong Univ ; Sejong Univ
语种英语
学科领域Astronomy & Astrophysics
出版者ASTRONOMICAL SOC PACIFIC
出版地390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
ISBN号978-1-583812-30-3
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归档日期2007-07-26
文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5946
专题双星与变星研究组
通讯作者Qian, SB (reprint author), Chinese Acad Sci, Natl Observatories Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
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GB/T 7714
Qian SB,Soonthornthum, B,朱俐颖Y,et al. Search for close binary stars during different key stages of the evolutionary track from detached to overcontact configurations[C]. 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA:ASTRONOMICAL SOC PACIFIC,2007:63-67.
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文件名: Search for Close Binary Stars during Different Key Stages of the Evolutionary Track from Detached to Overcontact Configurations.pdf
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