Deep Imagery of NGC 3603: Low-Mass Star Formation in the Closest Starburst Region

Details Deep Imagery of NGC 3603: Low-Mass Star Formation in the Closest Starburst Region Deep Imagery of NGC 3603: Low-Mass Star Formation in the Closest Starburst Region

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6763d&link_type=abstract

HST Proposal ID #6763

Physics

Hst Proposal Id #6763 Stellar Populations

Scientific paper

This proposal aims at studying the intermediate and low-mass stellar population in NGC 3603, the most luminous visible starburst region in the Galaxy, which more than rivals the dense core R136 of 30 Dor in the 7 times more distant LMC. Although the massive star content of this very dense cluster is now fairly well known, our knowledge of the medium- and low -mass part {1.5 - 10 M_odot} of the IMF in NGC 3603, not to mention more distant starbursts, is marginal at best. We therefore propose to obtain deep WFPC2 images of NGC 3603 that will allow us to probe its stellar content and IMF down to V=22.5 {M_v = +3.5; M 1.5 M_odot}. Questions such as a possible low-mass cutoff, variation of the IMF slope as a function of radius, and differential star formation will be addressed. In particular, we want to know if violent star formation of the most massive stars {and the subsequent strong ionization field and wind kinetic energy they generate} has prevented, or delayed, the formation of less massive stars in the very core of the cluster. Because of its proximity, NGC 3603 is the only truly dense starburst where we can directly observe whether or not violent, massive star formation efficiently quenches the formation of lower mass stars.

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