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2010MNRAS.408..157M - Mon. Not. R. Astron. Soc., 408, 157-169 (2010/October-2)
Ammonia observations of bright-rimmed clouds: establishing a sample of triggered protostars.
MORGAN L.K., FIGURA C.C., URQUHART J.S. and THOMPSON M.A.
Abstract (from CDS):
These observations confirm the presence of dense gas towards IRAS point sources detected at submillimetre wavelengths. Derived physical properties allow us to refine the sample of bright-rimmed clouds into those likely to be sites of star formation, triggered via the process of radiatively driven implosion. An investigation of the physical properties of our sources shows that triggered sources are host to greater turbulent velocity dispersions, likely indicative of shock motions within the cloud material. These may be attributed to the passage of triggered shocks or simply the association of outflow activity with the sources.
In all, we have refined the Sugitani, Fukui and Ogura catalogue to 15 clouds which are clearly star-forming and influenced by external photoionization-induced shocks. These sources may be said, with high confidence, to represent the best examples of triggering within bright-rimmed clouds.
Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS
Journal keyword(s): stars: early-type - stars: formation - stars: pre-main-sequence - ISM: clouds - photodissociation region (PDR)
Simbad objects: 47
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