University of Wisconsin

Space Astronomy Laboratory

ASTRO - 2

WUPPE

OBJECT: CH Cygni
ID # 3404

UW Astronomer: Chris Anderson


CH Cygni is an eclipsing binary system composed of a red giant and a hot compact object which is probably a magnetic white dwarf. The red giant sheds material into a sort of cocoon around the white dwarf. Occasionally, however, this material accretes onto the white dwarf possibly causing irregular outbursts of light that could last as long as a few days or even weeks.