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Density and temperature inhomogeneities in Planetary Nebulae

Published online by Cambridge University Press:  25 May 2016

A. F. Kholtygin
A. F. Kholtygin*
Affiliation:
Astronomical Institute, St. Petersburg University

Extract

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The carbon, nitrogen and oxygen abundances in the Planetary Nebulae (PN) derived from the optical recombination lines are usually much larger than those determined from collisional excited UV, IR and optical lines. This discordance is the bright evidence for PN to be strongly inhomogeneous. Starting with consideration by Peimbert (1967) we have been working out the code for calculation the nebular line intensities taking into account both temperature and density fluctuations.

Type
IV. Envelopes
Information
Symposium - International Astronomical Union , Volume 180: Planetary Nebulae , 1997 , pp. 247
Copyright
Copyright © Kluwer 1997 

References

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