中极性V709 Cas白光闪烁的小波和Hurst分析
Analysis of the white--light flickering of the Intermediate Polar V709 Cas with wavelets and Hurst analysis
摘要：
我们描述了在中极系统V709 Cas的光学光变曲线中观察到的闪烁，通过确定其在Fritz和Bruch（1998）分类方案中的α-Sigma中的位置。Sigma表示在给定时间尺度下闪烁的强度，而alpha描述在不同时间尺度下闪烁的能量分布。在这里，α是独立获得的小波和赫斯特R/S分析。闪烁在几十分钟到10秒的时间尺度上表现出自相似性，具有随机的持续记忆。alpha和Sigma似乎是相关的。在阿尔法-西格玛图V709 Cas属于该地区的磁性系统。由于V709 Cas仅在X射线中而不是在光学中显示磁性WD的自旋周期，因此我们得出结论，该方法可用于表征CV亚型，特别是当其分类不确定时。
英文摘要：
We characterize the flickering observed in the optical lightcurve of the Intermediate Polar system V709 Cas by determining its position in the alpha-Sigma as in the Fritz and Bruch (1998) classification scheme. Sigma represents the strength of flickering at a given timescale, while alpha describes the energy distribution of the flickering at different time scales. Here alpha is independently obtained with both the wavelets and the Hurst R/S analysis. The flickering shows self-similarity in the time scale ranging from tens of minutes down to 10 seconds with stochastic persistent memory in time. alpha and Sigma appear anticorrelated. In the alpha-Sigma diagram V709 Cas falls in the region of magnetic systems. Since V709 Cas shows the spin period of the magnetic WD only in the X-ray but not in the optical, we conclude that this method can be used to characterize CV subtypes especially when their classification is uncertain.
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