Computer Science
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997cokon.100..327r&link_type=abstract
Communications of the Konkoly Observatory, No. 100 (Vol. XII, 2), p. 327-332 (1997)
Computer Science
Scientific paper
Recent observations of the ultracompact HII regions generated by newly formed massive stars show an extremely complicated local environment. We have proposed that a significant fraction of ultracompact Hii regions are the result of the interaction of the wind and ionizing radiation from a young massive star with the clumpy molecular cloud gas in its neighbourhood. Mass loss from the neutral clumps allows the compact nebulae to be long-lived. Simple spatial distributions of the clumps within the ionized region allow the occurrence of subsonic and supersonic flows, with shocks or smooth transitions between them. Many of the commonest observed morphologies for these objects can be explained by these models. In particular, cometary morphologies can be reproduced by a gradient in the number density of mass loading centres across the region, as would be expected towards the edge of a dense molecular core.
Dyson John E.
Redman Matt P.
Williams Richard J.
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