Line-of-sight results from H II region models

Details Line-of-sight results from H II region models Line-of-sight results from H II region models

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...78..153g&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 78, Jan. 1992, p. 153-178. Research supported by Conselho Naciona

Mathematics

Logic

68

Active Galactic Nuclei, H Ii Regions, Interstellar Gas, Line Of Sight, Photoionization, Planetary Nebulae, Astronomical Models, High Resolution, Spatial Resolution

Scientific paper

This paper presents results for several useful line-of-sight quantities related to H II regions, such as line intensity ratios, ionic column densities, and temperature fluctuation, t squared. The value of t squared obtained from the models depends on the considered ion, gas abundance, gas density, and stellar temperature, as well as on the considered line of sight. Based on these results, a comparison between abundances obtained from empirical methods and those adopted in the models shows that the appropriated value of t squared must be used in any empirical abundance determination, especially when discussing abundance variations across a given nebula.

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