文章基本信息

标题：Photometric Solutions of Three Eclipsing Binary Stars Observed from Dome A, Antarctica
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作者：N. Liu ; J. N. Fu ; W. Zong 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2018
卷号：155
期号：4
页码：1-9
DOI：10.3847/1538-3881/aab266
语种：English
出版社：American Institute of Physics
摘要：Based on spectroscopic observations for the eclipsing binaries CSTAR036162 and CSTAR055495 with theWiFeS/2.3 m telescope at SSO and CSTAR057775 with the Mage/MagellanI at LCO in 2017, stellar parameters are derived. More than 100 nights of almost-continuous light curves reduced from the time-series photometric observations by CSTAR at Dome A of Antarctic in i in 2008 and in g and r in 2009, respectively, are applied to find photometric solutions for the three binaries with the Wilson–Devinney code. The results show that CSTAR036162 is a detached configuration with the mass ratio q=0.354±0.0009, while CSTAR055495 is asemi-detached binary system with the unusual q=0.946±0.0006, which indicates that CSTAR055495 may be a rare binary system with mass ratio close to one and the secondary component filling its Roche Lobe. This implies that a mass-ratio reversal has just occurred and CSTAR055495 is in a rapid mass-transfer stage. Finally, CSTAR057775 is believed to be an A-type WUMa binary with q=0.301±0.0008 and a fill-out factor of f=0.742(8).
关键词：binaries: eclipsing;stars: individual (CSTAR 036162, CSTAR 055495, CSTAR 057775)