The abundance of carbon in planetary nebulae

Details The abundance of carbon in planetary nebulae The abundance of carbon in planetary nebulae

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...273..214f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 273, Oct. 1, 1983, p. 214-218.

Astronomy and Astrophysics

Astrophysics

36

Abundance, Carbon Stars, Electrophotometry, Planetary Nebulae, Stellar Evolution, Line Spectra, Recombination Reactions

Scientific paper

New photoelectric observations of the C II 4267 A, C III 4647, 4650, 4651 A, and C IV 4659 A recombination lines have been obtained for 14 bright planetary nebulae and used to derive carbon abundances for these objects. The results indicate that carbon was enhanced in the progenitor by a factor of about 2 at the time of planetary nebula ejection, presumably from the dredge-up of newly synthesized triple-alphs carbon. It appears that C O is greater than about 1, indicating that the progenitor was a carbon star at that time. Planetary nebulae may be important contributors to galactic carbon enrichment, perhaps equaling or exceeding supernovae in this respect.

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