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Density and temperature inhomogeneities in Planetary Nebulae
Published online by Cambridge University Press: 25 May 2016
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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.
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- IV. Envelopes
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- Copyright © Kluwer 1997