Source: wikibot/cataclysmic-variable-star

= Cataclysmic variable star
{wiki=Cataclysmic_variable_star}

A cataclysmic variable star (CV) is a type of binary star system that consists of a white dwarf and a companion star, typically a red dwarf or another type of main-sequence star. These systems are characterized by their periodic outbursts, which can involve dramatic increases in brightness. In a cataclysmic variable system, the white dwarf captures material from its companion star through gravitational attraction.