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Theoretical Abundances in Planetaries

Published online by Cambridge University Press:  22 September 2016

Arrigo Finzi  and
Raphael Yahel
Arrigo Finzi
Affiliation:
Israel Institute of Technology, Haifa, Israel
Raphael Yahel
Affiliation:
Israel Institute of Technology, Haifa, Israel

Extract

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A satisfactory model of the formation of planetaries should explain the observations indicating that nitrogen and carbon in planetaries are overabundant by about one order of magnitude. These large abundances imply that substantial fractions of the galactic nitrogen and carbon originate from planetaries; one should then also investigate if the low value of the ratio C13/C12 measured on the Earth is compatible with an assumed dominant rate of the CNO cycle in the formation of planetaries.

Type
Session V: Chemical Abundances
Information
Symposium - International Astronomical Union , Volume 76: Planetary Nebulae , 1978 , pp. 247
Copyright
Copyright © Reidel 1978