Possible pulsations of the M giant in MWC560

Details Possible pulsations of the M giant in MWC560 Possible pulsations of the M giant in MWC560

2002-10-19

arxiv.org/abs/astro-ph/0210447v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, to appear in the proceedings of "Symbiotic stars probing stellar evolution", R.L.M.Corradi, J.Mikolajewska

Scientific paper

MWC 560 and other peculiar symbiotic binary, CH Cyg, have been classified as the prototypes of the new subclass of symbiotic systems - propellers, with accretion onto a magnetic white dwarf being the source of activity. The companion of the hot component in this model should demonstrate stellar wind with relatively high mass-loss. It can be expected rather a late AGB, Mira or semiregular variable (SR) than any normal red giant.Our analysis performed for the I band shows that the M giant probably belongs to such kind of stars and pulsates with a period of about 5 months.

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