oEA恒星QY Aql、BW Del、TZ Dra、BO Her和RR Lep：光度分析、频率搜索和进化状态
The oEA stars QY Aql, BW Del, TZ Dra, BO Her and RR Lep: Photometric analysis, frequency search and evolutionary status
摘要：
用Wilson-Devinney程序对oEA星QY Aql、BW Del、TZ Dra、BO Her和RR Lep的新的、完整的多波段光变曲线进行了分析。用傅立叶方法进一步分析光变曲线残差，以获得振荡分量的脉动特性。所有可靠的观测到的最小光照时间都用于检查轨道周期不规则性。轨道周期分析表明QY Aql和BW Del的长期变化，而光时间效应似乎是TZ Dra和BO Her周期变化的最佳解释。RR Lep的轨道周期相当稳定。光变曲线解提供了计算系统组成部分的绝对参数的手段，这些参数随后被用来估计它们目前的进化状态。
英文摘要：
New and complete multi-band light curves of the oEA stars QY Aql, BW Del, TZ Dra, BO Her and RR Lep were obtained and analysed with the Wilson-Devinney code. The light curves residuals were further analysed with the Fourier method in order to derive the pulsation characteristics of the oscillating components. All the reliable observed times of minimum light were used to examine orbital period irregularities. The orbital period analyses revealed secular changes for QY Aql and BW Del, while the Light-Time Effect seems to be the best explanation for the cyclic period changes in TZ Dra and BO Her. RR Lep has a rather steady orbital period. Light curve solutions provided the means to calculate the absolute parameters of the components of the systems, which subsequently were used to make an estimate of their present evolutionary status.
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