Abundances of southern type I planetary nebulae

Details Abundances of southern type I planetary nebulae Abundances of southern type I planetary nebulae

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...250..159d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 250, no. 1, Oct. 1991, p. 159-164. Research supported by CNPq and FAPESP.

Astronomy and Astrophysics

Astrophysics

42

Abundance, Planetary Nebulae, Helium, Nitrogen, Protostars, Southern Sky, Stellar Composition

Scientific paper

New spectroscopic data are used to determine the chemical composition of
southern planetary nebulae (PN). On the basis of He/H and N/O abundance
ratios, 8 objects are classified as probable Type I nebulae, according
to the classification scheme originally proposed by Peimbert.

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