This analysis of the long-term optical activity of the propellers AE Aqr and AR Sco uses data from the Catalina Real-time Transient Survey, DASCH, and AAVSO. The site and character of the emissions from the phenomena caused by the magnetic field of the white dwarf (WD) vary from system to system. The histogram of intensities of the ensemble of flares of AE Aqr suggests that the long-term activity consists of a large variety of the peak magnitudes of the flares, with the probability of their detection gradually decreasing with increasing intensity. Any increase of activity only leads to an increase of the number of blobs of the transferring matter. We also detected a season with a transient decrease or even a cessation of the mass outflow from the donor to the lobe of the WD. The very strong orbital modulation of AR Sco is most stable in the phases of the extrema of brightness for about a century; its minor changes suggest that the trailing side of the synchrotron-emitting region is more unstable than the leading side.

中文翻译：

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螺旋桨AE Aquarii和AR Scorpii的长期光学活性

对螺旋桨AE Aqr和AR Sco的长期光学活性的分析使用了来自Catalina实时瞬态测量，DASCH和AAVSO的数据。由白矮星（WD）的磁场引起的现象产生的辐射的位置和特征在系统之间是不同的。AE Aqr火炬集合强度的直方图表明，长期活动由火炬峰值强度的各种组成，随着强度的增加，它们的检测概率逐渐降低。活性的任何增加仅导致转移物质的斑点数目增加。我们还检测到一个季节，从供体到WD瓣的大量流出暂时减少甚至停止。AR Sco的非常强的轨道调制在亮度极值的相位中最稳定约一个世纪。它的微小变化表明同步辐射发射区的尾端比前导端更不稳定。