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Triggered formation and collapse of molecular cloud cores

Published online by Cambridge University Press:  01 August 2006

Anthony P. Whitworth
Anthony P. Whitworth*
Affiliation:
School of Physics & Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA, Wales, UK email: A.Whitworth@astro.cf.ac.uk
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Abstract

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First I discuss the dynamics of core formation in two scenarios relevant to triggered star formation, namely the fragmentation of shock-compressed layers created by colliding turbulent flows and the fragmentation of shells swept up by expanding nebulae. Second I discuss the influence of thermodynamics on the core mass spectrum, on determining which cores are ‘pre-stellar’ (i.e. destined to spawn stars) and on the minimum mass for a pre-stellar core. Third, I discuss the properties of pre-existing cores whose collapse has been triggered by an increase in external pressure, and compare the results with observations of collapsing pre-stellar cores and evaporating gaseous globules (EGGs).

Keywords

Stars: formationISM: cloudsISM: bubblesinstabilitiesturbulence
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S237: Triggered Star Formation in a Turbulent ISM , August 2006 , pp. 251 - 257
Copyright
Copyright © International Astronomical Union 2007

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