LMC HII region luminosities versus observed ionizing stars

Details LMC HII region luminosities versus observed ionizing stars LMC HII region luminosities versus observed ionizing stars

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasa...15..141o&link_type=abstract

Publications Astronomical Society of Australia, vol. 15, no. 1, p. 141-43

Astronomy and Astrophysics

Astronomy

8

Early-Type Stars, Hii Regions, Magellanic Clouds, Interstellar Medium

Scientific paper

We use the stellar census of OB associations in the Large Magellanic Cloud (LMC) to predict the H-alpha luminosities of the host HII regions, based on results from stellar atmosphere models. These values are compared to the observed HII region luminosities, yielding an estimate for the mean fraction of H-ionizing photons that escape the local nebulae in this sample. We formally estimate that, overall, 0% to 51% of the ionizing radiation escapes the local HII regions and is available to ionize the warm, ionized medium in the LMC. We find both nebulae that appear to be density-bounded, and ones that appear to be radiation-bounded.

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