Axisymmetric model of the ionized gas in the Orion Nebula

Details Axisymmetric model of the ionized gas in the Orion Nebula Axisymmetric model of the ionized gas in the Orion Nebula

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...374..564r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 374, June 20, 1991, p. 564-579.

Physics

161

Abundance, Astronomical Models, Ionized Gases, Orion Nebula, Density Distribution, Emission Spectra, Line Spectra, Thermodynamic Equilibrium

Scientific paper

New ionization and thermal equilibrium models for the ionized gas in the Orion Nebula with an axisymmetric two-dimensional 'blister' geometry/density distribution are presented. The HII region is represented more realistically than in previous models, while the physical detail of the microphysics and radiative transfer of the earlier spherical modeling is maintained. The predicted surface brightnesses are compared with observations for a large set of lines at different positions to determine the best-fitting physical parameters. The model explains the strong singly ionized line emission along the lines of sight near the Trapezium.

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