Computer Science
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9042s&link_type=abstract
HST Proposal ID #9042
Computer Science
Hst Proposal Id #9042 Hot Stars
Scientific paper
Recent surveys of starforming galaxies in the nearby Universe are discovering significant numbers of supernovae which have massive star progenitors {Types II, Ib and Ic}. The already extensive HST archive and high-resolution ground-based images of galaxies within 20 Mpc enables us to resolve and quantify their individual bright stellar content. As massive, evolved stars are the most luminous single objects in a galaxy, the progenitors of core-collapse supernovae should be directly detectable on pre-explosion images. We have detected one Type II progenitor this year, and have proposed a short, companion WFPC2 proposal to confirm this candidate and identify a second. This SNAP proposal aims to increase the amount of WFPC2 multi-colour, pre-explosion imaging data of spirals and high star-formation rate galaxies in the nearby Universe to 300 galaxies. By doing so we estimate that we may detect 2-3 massive core-collapse progenitors per year. Once we have this high-quality archive in place, we will run the detection program for about 5 years, which will produce a study of the colours of 10-15 progenitors, revolutionising the present knowledge in the field.
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