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 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9733s&link_type=abstract

HST Proposal ID #9733

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #9733 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 {and ground-based} image archives of galaxies within 20Mpc 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 two cycles we have set direct mass-limits on three type II-P supernovae using HST images, and already these can be used to constrain theoretical models of pre-supernova stellar evolution which predict which stars cause which of the supernovae 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. These ToO observations will allow the SNe to be precisely positioned on the pre-explosion frames with the required astrometric accuracy of around 0.05", and allow 3-colour photometry of the surrounding stellar populations for reddening estimations. The goal of this project is to directly identify the progenitor stars of core-collapse supernovae. We will compare the progenitor detections or luminosity limits to our own stellar evolutionary tracks in order to determine masses or restrictive mass-limits for the progenitors.

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