Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-06-23
Mon.Not.Roy.Astron.Soc.361:813-823,2005
Astronomy and Astrophysics
Astrophysics
12 pages, 7 figures, to appear in MNRAS
Scientific paper
10.1111/j.1365-2966.2005.09217.x
The predicted emission spectrum of NII is compared with observations of permitted lines in the Orion nebula. Conventional nebular models show that the intensities of the more intense lines can be explained by fluorescence of starlight absorption with a N abundance that is consistent with forbidden lines. Lines excited mostly by recombination on the other hand predict high N abundances. The effects of stellar and nebular parameters and of the atomic data on the predicted intensities are examined.
Escalante Vladimir
Morisset Christophe
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