Variability Study of the SX Phoenicis Star BL Camelopardalis
Variability Study of the SX Phoenicis Star BL Camelopardalis
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DOI：
10.1088/1009-9271/8/2/11
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发表时间：
2008-04
期刊：
影响因子：
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通讯作者：
J. Fu;Chao Zhang;K. Marak;C. Boonyarak;P. Khokhuntod;Shi-yang Jiang
中科院分区：
文献类型：
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作者：
J. Fu;Chao Zhang;K. Marak;C. Boonyarak;P. Khokhuntod;Shi-yang Jiang
2005 - 2007年在兴隆站进行了BL Cam V波段和白色光的新的时间序列测光观测。频率分析证实了两个紧密分离的频率，25.181 d−1和25.571 d−1，但文献中报道的31-32 d−1的频率在新数据中没有检测到。根据我们的光变曲线和互联网上提供的光变曲线，确定了新的最大光变时间，从而可以更全面地研究O−C图，以及文献中的最大光变时间。一个新的解释，包括BL Cam的周期在1988年之前增加和自1992年以来减少以及双星系统中的光时效应，看起来是合理的。
New time-series photometric observations of BL Cam in the V band and white light were made during 2005 to 2007 at the Xinglong Station of China. The frequency analysis confirms two closely separated frequencies, 25.181 d−1 and 25.571 d−1, but the frequency of 31–32 d−1 reported in the literature was not detected in the new data. New times of maximum light were determined from both our light curves and those available on Internet, allowing a more comprehensive study of the O−C diagram, together with the times of maximum light in the literature. A new interpretation, including the period increasing before 1988 and decreasing since 1992 of BL Cam and the light-time effect in a binary system, looks plausible.