文章基本信息

标题：Magnetic Activity and Period Variation Studies of the Short-period Eclipsing Binaries. III. V1175 Her, NSVS 2669503, and 1SWASP J133417.80+394314.4
本地全文：下载
作者：Hong-peng Lu ; Raul Michel ; Li-yun Zhang 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：156
期号：3
页码：1-13
DOI：10.3847/1538-3881/aad001
语种：English
出版社：American Institute of Physics
摘要：New multi-band CCD light curves of three binaries W UMa-type V1175 Her, NSVS 2669503, and 1SWASPJ133417.80+394314.4are presented. Spectroscopic data for V1175 Her and NSVS 2669503 show that theirspectral types are G7V and K4V, respectively. Photometric solutions of these three objects were obtained with thehelp of the Wilson–Devinney program. We find that V1175 Her is a semi-detached binary star with a hot spotlocated on the secondary component, while NSVS 2669503 and 1SWASP J133417.80+394314.4are contacteclipsing binaries with contact factors of f=1.070±0.002% and f=21.250±0.005%, respectively. Moreover,we found that the orbital period of V1175 Her is increasing at a rate of (+3.1±0.1)×10 −7 daysyr −1 . Thisincrease may be attributed to a dM dt M 0.93 10 yr-1 mass-transfer rate from the primary to the secondary component. Finally, we discuss the evolutionary stage of the component stars of these three systems.
关键词：binaries: eclipsing;stars: activity