A photometric study of BH Cas
A photometric study of BH Cas
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DOI：
10.1051/0004-6361:20010677
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发表时间：
2001-07
影响因子：
6.5
通讯作者：
S. Zoła;P. Niarchos;V. Manimanis;A. Dapergolas
中科院分区：
文献类型：
--
作者：
S. Zoła;P. Niarchos;V. Manimanis;A. Dapergolas
本文介绍了接触双星BH Cas的新的CCD观测结果。根据我们的观测，还给出了新的极小时刻和星历表。用Wilson-Devinney程序分析了在V、R和I滤波器中获得的完整光变曲线，导出了系统的几何和物理参数。最终的解决方案导致接触结晶（f 21 - 22%）。我们已经发现，光度质量比从光谱的一个约13%，这是不寻常的其他WUMA系统的差异。用系统的绝对元素来研究系统的演化状态。结果表明BH-Cas是一个相当演化的W-型W-UMa系统。
New CCD observations of the contact binary system BH Cas are presented in this paper. New times of minima and an ephemeris based on our observations are also given. Complete light curves obtained in the V , R and I lters have been analyzed with the Wilson-Devinney code to derive the geometrical and physical parameters of the system. The nal solution leads to a contact conguration (f 21 22%). We have found that the photometric mass ratio diers from the spectroscopic one by about 13%, a discrepancy which is not uncommon for other W UMa systems. The absolute elements of the system are used to study its evolutionary status. The results show that BH Cas is a fairly evolved W-type W UMa system.