On the distance scale of planetary nebulae and white dwarf birth rates

Details On the distance scale of planetary nebulae and white dwarf birth rates On the distance scale of planetary nebulae and white dwarf birth rates

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....61l..27w&link_type=abstract

Astronomy and Astrophysics, vol. 61, no. 4, Nov. 1977, p. L27-L30.

Astronomy and Astrophysics

Astrophysics

49

Astrometry, Planetary Nebulae, Stellar Evolution, White Dwarf Stars, Galactic Nuclei, Radial Velocity, Star Distribution

Scientific paper

Arguments are presented which favor an increase in the distance scale of planetary nebulae (PN) by 30% as compared with the Seaton-Webster scale. The consequences for evolutionary tracks, PN and white-dwarf relations, and birth rates are discussed. It is concluded that, contrary to Smith (1976), white-dwarf birth rates are not grossly underestimated and that the proposed change in the distance scale of PN brings white-dwarf and PN birth rates into almost complete agreement

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