PG 1159 star
STAR
PG1159 star; PG1159 stars; PG 1159 stars; Predegenerate
A PG 1159 star, often also called a pre-degenerate,Jaschek & Jaschek: CARBON C is a star with a hydrogen-deficient atmosphere that is in transition between being the central star of a planetary nebula and being a hot white dwarf. These stars are hot, with surface temperatures between 75,000 K and 200,000 K,Observational constraints on the evolutionary connection between PG 1159 stars and DO white dwarfs, S.