uvby light curves of the eclipsing binary system V2154 Cyg
uvby light curves of the eclipsing binary system V2154 Cyg
复制标题
食双星系统 V2154 Cyg 的 uvby 光变曲线
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
A. Claret
中科院分区：
文献类型：
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作者：
E. Rodriguez;J. M. García;S. Martín;A. Claret
本文给出了最近发现的双星系统V2154的完整紫外光曲线。还获得了额外的Crawford H数据。确定了3次初级极小值和2次次级极小值。改进后的轨道周期为2:6306312。使用EBOP代码进行了详细的光度分析。这颗食双星很可能是一颗更宽的双星的组成部分之一，形成了一个三重系统。结果表明，这对食对是由两颗大小差异很大的晚型恒星组成的分离系统。通过恒星演化模型推断出这些成分的质量约为M1 = 1:4 M和M2 =0:8 M。据估计，这个可能的三联星系统的总质量约为3.5 M，这使得这对视觉双星的最小轨道周期约为140年。
This paper presents complete uvby light curves for the recently discovered eclipsing binary system V2154 Cyg. Additional Crawford H data were also obtained. Three times of primary minima and two secondary minima are determined. An improved orbital period is found to be 2: 6306312. A detailed photometric analysis is made using the EBOP code. This eclipsing binary is probably one of the components of a much wider double star, forming altogether a triple system. The results show that the eclipsing pair is a detached system with two late-type stars very dierent in size. Masses of about M1 =1 :4 M and M2 =0 :8 M are inferred for the components by using stellar evolution models. The total mass of the probable triple system is estimated to be of about 3.5 M, leading to a minimum orbital period of about 140 yr for the visual pair.