V641 Cas is an interacting binary system consisting of a Mira type variable and B type white dwarf or subdwarf. The two components are surrounded by an envelope which is the source of the forbidden lines and other emission lines. If the large-scale variations in the light curve are caused by the orbital motion, the period will be about 5000 days. That would confirm the large orbital axis and the resulting low excitation.
Veroeffentlichungen der Sternwarte Sonneberg
- Pub Date:
- Symbiotic Stars: Light Curves;
- Symbiotic Stars: Periods;
- Interacting Binaries: Mira Stars