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2004MNRAS.353.1126W - Mon. Not. R. Astron. Soc., 353, 1126-1134 (2004/October-1)
Monte Carlo photoionization simulations of diffuse ionized gas.
WOOD K. and MATHIS J.S.
Abstract (from CDS):
Radiation leaking into the DIG from density bounded HII regions is generally harder in the H-ionizing continuum and has its He-ionizing photons suppressed compared to the ionizing source of the HII region. In line with other recent investigations, we find that such leaky HII region models can provide elevated temperatures and line ratios, and a lower He+ fraction in the DIG. For a composite model representing the relative spectral types of O stars in the solar neighbourhood, we find that the natural hardening of the radiation field reaching large heights in our simulations can explain most of the observed line ratios. However, additional heating is required to reproduce the largest line ratios in the DIG.
Abstract Copyright: 2004 RAS
Journal keyword(s): radiative transfer - HII regions
Simbad objects: 2
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