How D-type HII region expansion depends on numerical resolution
arXiv:2112.09013 · doi:10.1093/mnras/stab3707
Abstract
We investigate the resolution dependence of HII regions expanding past their Strömgren spheres. We find that their structure and size, and the radial momentum that they attain at a given time, is in good agreement with analytical expectations if the Strömgren radius is resolved with . If this is not satisfied, the radial momentum may be over- or under-estimated by factors up to 10 or more. Our work has significance for the amount of radial momentum that a HII region can impart to the ambient medium in numerical simulations, and thus on the relative importance of ionizing feedback from massive stars.
arXiv comment6 pages, 2 figures, accepted for publication in MNRAS
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