Continuum Pumping of [Fe II] in the Orion Nebula

Details Continuum Pumping of [Fe II] in the Orion Nebula Continuum Pumping of [Fe II] in the Orion Nebula

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.4309v&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #43.09; Bulletin of the American Astronomical Society, Vol. 32, p.1470

Astronomy and Astrophysics

Astronomy

Scientific paper

We present detailed comparisons between numerical simulations of Fe II emission spectra and recent high resolution and signal to noise spectra of the Orion Nebula. We have identified 40 [Fe II] lines in the spectrum, allowing extensive comparisons between theory and observations. The identifications are based on predictions of a realistic model of the Fe II atom which includes the lowest 371 levels (all levels up to 11.6 eV). We investigate the dependence of the spectrum on electron density and on pumping by the stellar continuum. Orion is important because it provides a relatively simple environment to test complex simulations. We have identified the pumping routes that are responsible for the observed emission. Our theoretical model of Fe II emission is in good agreement with the observational data.

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