Detecting the progenitors of core-collapse supernovae

Details Detecting the progenitors of core-collapse supernovae Detecting the progenitors of core-collapse supernovae

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hst..prop10498s&link_type=abstract

HST Proposal ID #10498

Computer Science

Hst Proposal Id #10498 Hot Stars

Scientific paper

Modern supernovae searches in the nearby Universe are discovering large numbers of SNe which have massive star progenitors {Types II, Ib and Ic}. The extensive HST image archives within 20Mpc enables their indvidual bright stellar content to be resolved. As massive, evolved stars are the most luminous single objects in a galaxy, the progenitos of core-collapse SNe should be directly detectable on pre-explosion images. Two recent highlights of our ongoing HST programme are that we have detected the first red supergiant progenitor of a normal type II supernova and shown that SN1993J came from a binary system by detecting the companion star at the position of the SN. We have detected a further two progenitor stars of normal type II-P supernovae, set mass limits on a further 7 and suggest that faint type II supernovae are unlikely to come from the collapse of very massive stars which form black holes. These discoveries are providing strong constraints on theoretical models of pre-supernova evolution and the origin of the supernova types. We request time to continue this successful project and require ACS observations of future SNe which are discovered in galaxies closer than 20Mpc which have pre-explosion HST archive images available. This will allow the SNe to be precisely positioned on the pre-explosion images. We have set a final goal for this project of determining masses and types, or setting restrictive mass-limits for 30 supernovae, before the demise of HST.

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