Physics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5400f&link_type=abstract
HST Proposal ID #5400
Physics
Hst Proposal Id #5400 Galaxies &Amp, Clusters Starbursts
Scientific paper
NGC 5102 is a nearby (4 Mpc) galaxy of classical SO appearance which has undergone a recent starburst in its nucleus, bulge and disk. Because it is so close, it provides a unique opportunity to investigate the IMF of a typical starburst, the mass of starburst matter relative to the underlying older population, and the effect of the starburst on the largescale structure of this galaxy. WFPC2 images will be used to derive the luminosity function and IMF for the starburst matter in three regions of NGC 5102, at different distances from the nucleus. In the inner high surface brightness region, the crucial massive end of the mass function (stars more massive than 8 M_sun) is accessible. In the outer disk, where the surface brightness is lower, we will be able to derive the mass function for stars more massive than 5 M_sun. This proposal is part of a larger program on this important galaxy, involving extensive groundbased optical and radio observations. The HST is required for its high spatial resolution, which enables faint stars of the starburst to be detected against the high background surface brightness of this galaxy. This proposal was accepted for Cycle 1 (#2436) but was not retained when the Cycle 1 program was reassessed because of the primary mirror flaw.
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