Clumpy ultracompact HII regions -- III. Cometary morphologies around stationary stars
Astrophysics
2015-06-24 v1
Abstract
Cometary ultracompact HII regions have been modelled as the interaction of the hypersonic wind from a moving star with the molecular cloud which surrounds the star. We here show that a similar morphology can ensue even if the star is stationary with respect to the cloud material. We assume that the HII region is within a stellar wind bubble which is strongly mass loaded: the cometary shape results from a gradient in the distribution of mass loading sources. This model circumvents problems associated with the necessarily high spatial velocities of stars in the moving star models.
Keywords
Cite
@article{arxiv.astro-ph/9603003,
title = {Clumpy ultracompact HII regions -- III. Cometary morphologies around stationary stars},
author = {R. J. R. Williams and J. E. Dyson and M. P. Redman},
journal= {arXiv preprint arXiv:astro-ph/9603003},
year = {2015}
}
Comments
6 pages with MN LaTeX macros, includes 5 postscript figures. Also available at http://axp2.ast.man.ac.uk:8000/Preprints.html