FS Aurigae: a Triple Cataclysmic Variable System containing Precessing, Magnetic White Dwarf

摘要

We present here results of numerical calculations demonstrating that the verylong periodic variability detected in the Cataclysmic Variable FS Aur can bethe result of eccentricity modulation of a close binary (CB) orbit induced bythe presence of a third body on a circumbinary orbit. A third component with asubstellar mass on a circular, relatively close orbit, modulates the masstransfer rate of the binary on much longer time scales than periods within thetriple system. We also report here preliminary results of X-ray observations ofFS Aur, providing further evidence that it contains magnetic and freelyprecessing white dwarf. These two findings allow us to incorporate the new andpreviously stressed hypothesis on the nature of FS Aur into one consistentmodel.