The Near-Contact Binary FU Ara:New Observations,a Photometric Study and Preliminary Elements

作     者：A. Paschke F. Acerbi C. Barani A.Paschke1,F.Acerbi2 and C.Barani3 1 Weierstr 30,8630 Rueti,Switzerland 2 Via Zoncada 51,26845 Codogno(LO),Italy 3 Via Molinetto 35,26845 Triulza di Codogno(LO),Italy

作者机构：Weierstr 30 8630 Rueti Switzerland Via Zoncada 51 26845 Codogno （LO） Italy Via Molinetto 35 26845 Triulza di Codogno （LO） Italy 

出 版 物：《Chinese Journal of Astronomy and Astrophysics》 (中国天文和天体物理学报（英文版）)

年 卷 期：2008年第8卷第6期

页      面：707-713页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

主　　题：binaries: eclipsing stars: fundamental parameters stars: individual:FU Ara 

摘      要：A new CCD （V） light curve is presented for the semi-detached binary system FU Ara. The light curve, obtained in 2007, is the first one since the last 50 years. With our data we were able to determine six new times of minimum light and refined the period of the system to 0.8645049 days. A Wilson-Devinney analysis leads to a solution of a semi- detached configuration, composed of a main-sequence primary component of spectral type F5, fractionally smaller than its Roche lobe, and an evolved secondary component of spectral type K1 which fills its Roche lobe, and which is overluminous and oversized as compared with the main-sequence. The two components of FU Ara differ considerably in effective temperature. It is classified as an FO Virginis type of near-contact binary system. Assuming a reasonable value for the mass of the primary component, an estimate of the absolute elements of FU Ara has been made, on the assumption that the primary has a mass corresponding to its spectral type according to Svechnikov ＆ Taidakova.