Identifying progenitors of core-collapse supernovae

Details Identifying progenitors of core-collapse supernovae Identifying progenitors of core-collapse supernovae

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..218g&link_type=abstract

NOAO Proposal ID #2008B-0218

Physics

Optics

Scientific paper

Direct observations of massive stars - before they explode - provide a model free identification of SN progenitors. Such studies require the combination of a deep, high-resolution image of the SN location, serendipitously obtained before it exploded, with a precise localization of the SN (after it exploded) to enable us to select the correct progenitor from among the stars in the pre-explosion SN images. After decades of effort, only nine SN progenitors have so far been detected (7 during the last 5 years). About twice a year a nearby SN is discovered in an area previously observed by HST. The few recent identifications were mainly based on repeat HST post-explosion imaging for this purpose. A better alternative for SN localization is now provided by laser-guide- star assisted adaptive optics systems (LGS-AO), as we have initially demonstrated using the Keck LGS system. Here, we propose to continue our successful program (2006-2007, 2008A) to use NIRI+ALTAIR in LGS mode to localize nearby SNe and identify their progenitors. A minimal Gemini allocation (1 hour) leveraged by superb archival HST data will provide exciting results. With each additional progenitor identified and studied, we move closer to a robust mapping of specific progenitors to each SN class, a key to understand the physics of these powerful cosmic explosions.

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