The N ii spectrum of the Orion nebula |
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| Authors: | Vladimir Escalante Christophe Morisset |
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| Institution: | Centro de Radioastronomía y Astrofísica, Ap. Postal 72–3, C. P. 58091, Morelia, Michoacán, Mexico;Instituto de Astronomía, Ap. Postal 70–264, C. P. 04510, México, DF, Mexico |
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| Abstract: | The predicted emission spectrum of N ii 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. |
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| Keywords: | line: formation ISM: individual: Orion nebula |
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