Possible Periodic Components in the Flickering of CH Cyg and MWC 560
CH Cyg and MWC 560 are very peculiar symbiotic binaries consisting of an M giant and a white dwarf companion. The systems have many features in common. In particular, both show occasional eruptions with sub-Eddington luminosity, followed by the appearance of high-velocity jets. Recently, Mikolajewski, Mikolajewska & Tomov (1995) have proposed a model of activity for these systems with a rapidly rotating magnetic white dwarf accreting from the M giant’s wind. Two states of activity are possible: propeller and accretor. Although, both stars spend most time in the propeller state, occasional propeller-accretor (and vice versa) transitions may give rise to bipolar outflows and rapid jet formations. Mikolajewski et al. (1995) also proposed to distinguish a new subclass of interacting binaries — propeller stars — with CH Cyg and MWC 560 being the prototypes.
KeywordsWhite Dwarf Periodic Component Compact Star Magnetic Rotator Coherent Oscillation
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