Emission-line spectra and the abundance of carbon and nitrogen ions in planetary nebulae

Details Emission-line spectra and the abundance of carbon and nitrogen ions in planetary nebulae Emission-line spectra and the abundance of carbon and nitrogen ions in planetary nebulae

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981azh....58..101n&link_type=abstract

(Astronomicheskii Zhurnal, vol. 58, Jan.-Feb. 1981, p. 101-105.) Soviet Astronomy, vol. 25, Jan.-Feb. 1981, p. 56-58. Translati

Astronomy and Astrophysics

Astronomy

1

Abundance, Carbon, Emission Spectra, Line Spectra, Nitrogen Ions, Planetary Nebulae, Electron Transitions, Stellar Spectra

Scientific paper

Relative C and N ion abundances in high-excitation planetary nebulae are determined from theoretical recombination spectra of the C III, N III, C IV, and N IV ions. It is found that such nebulae are overabundant in carbon, and the relative C IV abundance increases with electron temperature. The present results agree with stellar evolution theories which predict that at some gradually expanding gaseous envelope with an enhanced C, N, and O abundance will form.

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