The effect of heavy element opacity on the structure of H II regions

Details The effect of heavy element opacity on the structure of H II regions The effect of heavy element opacity on the structure of H II regions

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...274..671r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 274, Nov. 15, 1983, p. 671-676.

Other

17

Abundance, H Ii Regions, Nebulae, Astronomical Models, Astronomical Spectroscopy, Ionization, Opacity

Scientific paper

In the modeling of H II regions, there generally has been universal dismissal of opacity due to elements other than H and He. It is found that in certain cases, the trace elements do contribute substantially to the opacity, modifying the ionization equilibrium directly and having feedback on the thermal structure. When important, this effect will reduce the volume where some lines from high ionization states are produced and will decouple transition zones that have traditionally been assumed to be coextensive. The possible reconciliation of some recent problems where observations and theory appeared to be inconsistent with one another are discussed.

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