Do planetary-nebula nuclei form an evolutionary sequence

Details Do planetary-nebula nuclei form an evolutionary sequence Do planetary-nebula nuclei form an evolutionary sequence

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sval....5..104k&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 5, Apr. 1979, p. 195-197.) Soviet Astronomy Letters, vol. 5, Mar.-Apr. 1979, p. 104-106

Astronomy and Astrophysics

Astronomy

1

Planetary Nebulae, Stellar Evolution, Binary Stars, Brightness, Hertzsprung-Russell Diagram, O Stars, Stellar Luminosity, Stellar Spectra, Stellar Temperature

Scientific paper

An analysis is made of how planetary-nebula nuclei whose spectrum has been classified are distributed with respect to the radio surface brightness of the nebula, and of how they are distributed in the Hertzsprung-Russell diagram. It is suggested that the spectrum of these stars may begin to evolve at type Of and WR in the youngest objects; after passing through the Cont and O VI stages, the evolution would conclude with type O spectra for the nuclei of the oldest and most rarefied planetaries.

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