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Title:
Models of H II regions - Heavy element opacity, variation of temperature [ Erratum: 1988ApJS...68..519R ]
Authors:
Rubin, R. H.
Affiliation:
AA(NASA, Ames Research Center, Astrophysical Experiments Branch, Moffett Field; California, University, Los Angeles, CA)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 57, Feb. 1985, p. 349-387. (ApJS Homepage)
Publication Date:
02/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Models, H Ii Regions, Heavy Elements, Nebulae, Opacity, Astronomical Catalogs, Electron Energy, Metallicity, Tables (Data)
DOI:
10.1086/191007
Bibliographic Code:
1985ApJS...57..349R

Abstract

A detailed set of H II region models that use the same physics and self-consistent input have been computed and are used to examine where in parameter space the effects of heavy element opacity is important. The models are briefly described, and tabular data for the input parameters and resulting properties of the models are presented. It is found that the opacities of C, Ne, O, and to a lesser extent N play a vital role over a large region of parameter space, while S and Ar opacities are negligible. The variation of the average electron temperature T(e) of the models with metal abundance, density, and T(eff) is investigated. It is concluded that by far the most important determinator of T(e) is metal abundance; an almost 7000 K difference is expected over the factor of 10 change from up to down abundances.

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