Photometric properties of the δ Scuti star BR Cancri
Photometric properties of the δ Scuti star BR Cancri
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DOI：
10.1046/j.1365-8711.2001.04275.x
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发表时间：
2001-05
影响因子：
4.8
通讯作者：
Ai-ying Zhou;E. Rodríguez;A. Rolland;V. Costa
中科院分区：
文献类型：
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作者：
Ai-ying Zhou;E. Rodríguez;A. Rolland;V. Costa
本文介绍了为期三年的约翰逊V和斯特龙格伦对盾牌座δ星星巨蟹座BR（BR Cnc）的uvbyH β测光研究结果。我们的数据集包括1293离散微分幅值在约翰逊V和黄色的Y过滤器，883在Stromgren V和239在UB过滤器。数据的傅立叶分析表明变量的四个脉动频率：f1 = 24.978，f2 = 11.358，f3 = 11.808和f4 = 27.914周期d − 1。在三个观察年期间，主频率f1将其V（y）振幅保持在约6毫磁重，但其v振幅似乎在变化。所有其他三个频率的幅度变化也被要求保护。根据颜色数据讨论了频率的脉动模式。利用文献中的uvby β数据和校准，我们导出了BR Cnc的物理参数。
We present the results of a three-year Johnson V and Stromgren uvbyHβ photometric study of the δ Scuti star BR Cancri (BR Cnc). Our data sets consist of 1293 discrete differential magnitudes in Johnson V and yellow y filters, 883 in Stromgren v and 239 in ub filters. The Fourier analysis of the data suggests four pulsation frequencies for the variable: f1=24.978,f2=11.358,f3=11.808 and f4=27.914 cycle d−1. During the three observing years, the main frequency f1 kept its V(y) amplitude constant at about 6 mmag but its v amplitude seems to be changing. Amplitude variations for all the three other frequencies are also claimed. The pulsation modes of the frequencies are discussed based on the colour data. Using uvbyβ data and calibrations in the literature, we derive the physical parameters for BR Cnc.