The IMF in Starbursts

Details The IMF in Starbursts The IMF in Starbursts

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc..341b&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 report on our ongoing study of the stellar content of starburst regions. Numerous claims have been made, both on theoretical and observational grounds, that the initial mass function (IMF) in regions of violent star formation differs significantly from the solar neighborhood. If the cloud fragmentation and accretion processes depend strongly on the environment, the resulting IMF slope as well as the upper and lower mass cut-offs may vary significantly. In order to derive the mass function in violent star forming regions we used HST/NICMOS, VLT(ANTU)/ISAAC, and ESO's ADONIS to spatially resolve their stellar content. Our study is mainly based on the two closest massive star forming regions NGC 3603 and 30 Doradus but recent ISO results indicate that these regions are likely to be representative building blocks of starburst galaxies. We find no evidence for an exotic mass function, although the slope varies locally. In particular, our spatially integrated results do not indicate a pronounced flattening or cut-off down to our detection limits.

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