PG 1159 star

• abstract: A PG 1159 star, often also called a pre-degenerate,Jaschek & Jaschek: CARBON C is a star with a hydrogen-deficient atmosphere which 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.

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