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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)1; Soonthornthum, B2; 朱俐颖Y1; He JJ(何家佳)1; Dai ZB(戴智斌)1; Liu L(刘亮)1; Zhang J(张嘉)1; Liao WP(廖文萍)1
Source PublicationASTRONOMICAL SOCIETY OF THE PACIFIC (ASP) CONFERENCE SERIES - Seventh Pacific Rim Conference on Stellar Astrophysics
2007
Volume362
Pages63-67
Author of SourceKang, YW; Lee, HW; Cheng, KS; Leung, KC
Contribution Rank第1完成单位
Indexed ByCPCI
Conference Name7th Pacific Rim Conference on Stellar Astrophysics
Conference Date2005-11-15
Conference PlaceSejong Univ, Seoul, SOUTH KOREA
Conference SponsorAstrophy Res Ctr Structure & Evolut Cosmos; Korea Astron & Space Sci Inst; Korean Spac Sci Soc; Korea Sci & Engn Fdn
Abstract

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.

Funding ProjectScience and Technology Department of Yunnan Province[2003RC19] ; Yunnan Natural Science Foundation[2005A0059M] ; Chinese Natural Science Foundation[10573032, 10433030] ; Chinese Academy of Sciences[KJCXZSW-T06]
Funding OrganizationScience and Technology Department of Yunnan Province ; Yunnan Natural Science Foundation ; Chinese Natural Science Foundation ; Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 天体物理学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeProceedings Paper
PublisherASTRONOMICAL SOC PACIFIC
Publication Place390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
ISBN978-1-583812-30-3
URL查看原文
Archive Date2007-07-26
WOS IDWOS:000247563200009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPeriod
Citation statistics
Document Type会议论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5946
Collection双星与变星研究组
Corresponding AuthorQian SB(钱声帮)
Affiliation1.National Observatories/Yunnan Observatory, Chinese Academy of Science,, P.O. Box 110, 650011 Kunming, P. R. China
2.National Astronomical Research Institute, Chiang Mai 50200, Thailand
Recommended Citation
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]//Kang, YW; Lee, HW; Cheng, KS; Leung, KC. 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA:ASTRONOMICAL SOC PACIFIC,2007:63-67.
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