Direct imaging of the progenitors of massive, core-collapse supernovae

Details Direct imaging of the progenitors of massive, core-collapse supernovae Direct imaging of the progenitors of massive, core-collapse supernovae

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9353s&link_type=abstract

HST Proposal ID #9353

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Hst Proposal Id #9353

Scientific paper

Modern supernovae searches in the nearby Universe are discovering vast numbers of SNe which have massive star progenitors {Types II, Ib and Ic}. The extensive HST {and ground-based} image archives of galaxies within 20 Mpc enables their individual bright stellar content to be resolved. As massive, evolved stars are the most luminous single objects in a galaxy, the progenitors of core-collapse SNe should be directly detectable on pre-explosion images. Within the last year we have set direct mass limits on the progenitors of two SNe Type II-P by analysing pre-explosion archive images and follow up HST exposures. We have now identified six other recent, nearby SNe which have WFPC2 archive exposures of the site taken before explosion. Additionally, our Cycle 10 SNAP program will double the WFPC2 image archive of nearby galaxies which significantly increases the chances of having multi-colour photometry of pre-explosion sites for future SNe. In this Cycle, we request time on two fronts. Firstly we require imaging of the six SNe with existing pre-explosion data in order to perform exact astrometry of the SNe positions to around 0.05''. Secondly, as a follow on from our two successful Cycle 10 programs, we request ToO status for any nearby core-collapse SN which explodes during Cycle 11 and which has pre-explosion HST images. The goal of this proposal is to directly identify the progenitor stars of core-collapse SNe.

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