Chemical abundances of disk planetary nebulae

Details Chemical abundances of disk planetary nebulae Chemical abundances of disk planetary nebulae

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...261..579d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 261, no. 2, p. 579-588.

Astronomy and Astrophysics

Astrophysics

39

Abundance, Planetary Nebulae, Stellar Composition, Helium, Interstellar Matter, Stellar Spectrophotometry

Scientific paper

New determinations of chemical abundances of disk planetary nebulae in the southern hemisphere are reported. Most objects belong to Type II according to the classification scheme proposed by Peimbert (1990). We present line fluxes, color excesses, electron temperatures and densities, and abundances of He, N, O, Ne, S, and Ar for 33 nebulae, several of which for the first time. Distance-independent correlations are used to classify these objects according to the population types within the subsystem of planetary nebulae.

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