Planetary Nebulae IV. Predicted Chemical Composition and Interstellar Enrichment

Details Planetary Nebulae IV. Predicted Chemical Composition and Interstellar Enrichment Planetary Nebulae IV. Predicted Chemical Composition and Interstellar Enrichment

Dec 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971bott....6..101t&link_type=abstract

Boletín de los Observatorios de Tonantzintla y Tacubaya Vol. 6, pp. 101-111 (1971) (http://www.astroscu.unam.mx/~bott/)

Astronomy and Astrophysics

Astronomy

31

Ism: Abundances, Stars: Evolution, Planetary Nebulae

Scientific paper

Based on stellar evolution models and on observations of planetary nebulae we have studied the change of chemical abundances in the interstellar medium. It is found that the contribution to the N/O abundance gradient present across disks of spiral galaxies by planetary nebulae is considerably more important than that produced by supernovae. We analyze the chemical abundances of the nuclei of M51 and M81 from stellar evolution results and the observed emission lines.

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