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A Reanalysis of C/O Ratios in Planetary Nebulae

Published online by Cambridge University Press:  07 August 2017

C. Rola  and
G. Stasinska
C. Rola
Affiliation:
DAEC, Observatoire de Paris-Meudon, France Centro de Astrofisica, Universidade do Porto, Portugal
G. Stasinska
Affiliation:
DAEC, Observatoire de Paris-Meudon, France

Extract

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It is often mentioned in the literature that, in planetary nebulae, carbon abundancesderived from optical lines are systematically much larger than derived from UV lines. Various explanations have been proposed: line blends, inaccurate atomic physics, temperature fluctuations, non uniform distribution of carbon inside nebulae… Here, we study the effect of random errors in the line intensity measurements.

Type
VI. Planetary Nebulae in Galactic Systems
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 582
Copyright
Copyright © Kluwer 1993