W UMa双星V796 Cep、V797 Cep、CSS J015341 .9+381641和NSVS 3853195的观测和光变曲线解
Observations and light curve solutions of the W UMa binaries V796 Cep, V797 Cep, CSS J015341.9+381641 and NSVS 3853195
摘要：
本文给出了四个WUMa双星V796 Cep、V797 Cep、CSSJ015341.9 +381641和NSVS 3853195的Sloang '和i'波段测光观测结果。我们的观测表明CSS J015404.1+382805和NSVS 3853195是同一颗恒星。我们确定了所有目标的初始时期T_{0}，并改进了NSVS 3853195的时期。光变曲线解表明，每个目标的组分在质量、温度、半径和光度上几乎相同。恒星成分是G和K光谱类型，并经历日偏食。所有的系统都有几乎过接触的配置，属于H亚型W UMa双星。我们建立了发光比l_{2} / l_{1}与靶的质量比q之间的近似关系为l_{2} / l_{1} = q^{1.5}。
英文摘要：
Photometric observations in Sloan g' and i' bands of four W UMa binaries, V796 Cep, V797 Cep, CSS J015341.9+381641 and NSVS 3853195, are presented. Our observations showed that CSS J015404.1+382805 and NSVS 3853195 are the same star. We determined the initial epochs T_{0} of all targets and improved the period of NSVS 3853195. The light curve solutions of our data revealed that the components of each target are almost the same in mass, temperature, radius and luminosity. The stellar components are of G and K spectral types and undergo partial eclipses. All systems have barely-overcontact configurations and belong to H subtype W UMa binaries. We established that the relation between the luminosity ratio l_{2}/l_{1} and mass ratio q of our targets is approximately l_{2}/l_{1} = q^{1.5}.
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