Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329...65b&link_type=abstract
Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.
Astronomy and Astrophysics
Astrophysics
Scientific paper
Numerical simulations highlight that star formation is a dynamical process in which stars interact during their formation. Of particular interest is that accretion in a clustered environment is non-uniform in that stars located in the centre of the potential accrete more and become more massive. This competitive accretion process can explain the initial mass function of stars, including a shallow slope for low-mass stars and a steeper Salpeter-like slope for higher-mass stars. Numerical simulations of the fragmentation and formation of a stellar cluster show that the final stellar masses are due to competitive accretion and that this results in a realistic IMF. Competitive accretion also naturally results in a direct correlation between the richness of a cluster and the mass of the most massive star therein. Shallower IMFs are possible if the Jeans mass is significantly higher than one M&sun;.
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