Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...467..603r&link_type=abstract
Astronomy and Astrophysics, Volume 467, Issue 2, May IV 2007, pp.603-610
Astronomy and Astrophysics
Astrophysics
3
Ism: Hii Regions, Ism: Kinematics And Dynamics, Stars: Winds, Outflows
Scientific paper
We carried out a series of 1D hydrodynamical computations with the ZEUS fluid solver in order to reproduce the salient features in our high-resolution Hα emission line profiles of a sample of HII regions (see Rozas et al. 2006a,b). Four models were computed. In the first and second cases, an ionization-bounded HII region was modeled with and without a shell produced by stellar winds. In the third and fourth cases, a density-bounded HII region was considered, both with and without a shell driven by stellar winds. The resulting line profiles have been modeled using the SHAPE rendering program. We find that our observed high-quality profiles are well-reproduced in the density-bounded model that includes an expanding shell formed as a result of the stellar winds from the ionizing stars. Finally, we consider the effects that the finite slit widths used for the observations have on the physical conditions deduced from the line profile of the ionized bubble.
Garcia-Segura Guillermo
Lopez Jose Alberto
Richer Michael Gerard
Rozas Maite
Steffen Will
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