Thermal Instability Analysis of Collapsing Gas Cloud and Formation of Bound Clusters

Details Thermal Instability Analysis of Collapsing Gas Cloud and Formation of Bound Clusters Thermal Instability Analysis of Collapsing Gas Cloud and Formation of Bound Clusters

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc..365t&link_type=abstract

Star Formation 1999, Proceedings of Star Formation 1999, held in Nagoya, Japan, June 21 - 25, 1999, Editor: T. Nakamoto, Nobeyam

Physics

Scientific paper

We perform linear analysis of thermal instability in a contracting large cloud filled with warm HI gas and investigate the effect of metallicity and radiation flux. When the cloud density reaches critical value nf, the cloud fragments into cool dense condensations due to thermal instability. For the lower metallicity gas cloud, the value of nf is the higher. Dependence on radiation flux is not so strong as metallicity. Collision between condensations will produce large density inhomogeneity, then stars will form. From the result of calculation, high star formation efficiency and efficient bound cluster formation are expected in a low metallicity environment.

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