寻找和检验弱周期变率的新工具
New tools for finding and testing of weak periodical variability
摘要：
我们的论文提出了寻找和测试恒星物体弱周期变化的新方法，旨在检测大麦云中磁化学特殊（mCP）候选物的预期规则光变化。我们介绍了两个新的周期图的mCP星，BS Cir（HD 125630），适合旋转斑点变星，并比较结果与著名的Lomb-Scargle周期图。周期图的使用和测试的发现周期候选人的意义证明了两个例子：观测和模拟观测的磁场的mCP明星CQ UMa（HD 119213）和mCP候选人OGLE LMC 136.7 16501。提出了三种新的周期性检验方法--洗牌检验、自助检验和辅助检验。我们证明，发现的周期性变化已知的信噪比大于6可以被批准为真实的。
英文摘要：
Our paper presents new methods for finding and testing of weak periodic variability of stellar objects developed for the purpose of detecting expected regular light variations of magnetic chemically peculiar (mCP) candidates in the Large Magellanic Cloud. We introduce two new periodograms of the mCP star, BS Cir (HD 125630), appropriate for rotating spotted variables and compare the results with those obtained by the well-known Lomb-Scargle periodogram. The usage of periodograms and the testing of the significance of the found period candidates are demonstrated with two examples: the observed and simulated observations of the magnetic field of the mCP star CQ UMa (HD 119213) and the mCP candidate OGLE LMC136.7 16501. Three newly developed tests of the periodic variability - the shuffling, bootstrap and subsidiary ones, are presented. We demonstrate that the found periodic variations known with Signal-to-Noise ratio larger than 6 can be approved as real.
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