Continuum pumping of [Fe II] in the Orion Nebula

E. M. Verner; D. A. Verner; J. A. Baldwin; G. J. Ferland; P. G. Martin

doi:10.1086/317159

Continuum pumping of [Fe II] in the Orion Nebula

E. M. Verner, D. A. Verner, J. A. Baldwin, G. J. Ferland, P. G. Martin

Physics And Astronomy

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48 Scopus citations

Abstract

This paper presents 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 in which 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.

Original language	English
Pages (from-to)	831-839
Number of pages	9
Journal	Astrophysical Journal
Volume	543
Issue number	2 PART 1
DOIs	https://doi.org/10.1086/317159
State	Published - Nov 10 2000

Keywords

Atomic data
H II regions
ISM: individual (Orion Nebula)
Line: formation
line: identification

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/317159

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title = "Continuum pumping of [Fe II] in the Orion Nebula",

abstract = "This paper presents 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 in which 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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author = "Verner, {E. M.} and Verner, {D. A.} and Baldwin, {J. A.} and Ferland, {G. J.} and Martin, {P. G.}",

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doi = "10.1086/317159",

language = "English",

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T1 - Continuum pumping of [Fe II] in the Orion Nebula

AU - Verner, E. M.

AU - Verner, D. A.

AU - Baldwin, J. A.

AU - Ferland, G. J.

AU - Martin, P. G.

PY - 2000/11/10

Y1 - 2000/11/10

N2 - This paper presents 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 in which 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.

AB - This paper presents 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 in which 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.

KW - Atomic data

KW - H II regions

KW - ISM: individual (Orion Nebula)

KW - Line: formation

KW - line: identification

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART 1

ER -

Continuum pumping of [Fe II] in the Orion Nebula

Abstract

Keywords

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