The Many Facets of Type Ibc Supernovae

Details The Many Facets of Type Ibc Supernovae The Many Facets of Type Ibc Supernovae

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..427s&link_type=abstract

NOAO Proposal ID #2008B-0427

Computer Science

Scientific paper

The connection between GRBs and Type Ibc supernovae is well established in broad terms. However, the overlap in Nickel production between GRB-SNe and SNe Ibc suggests that the essential process that drives relativistic ejecta in some SN explosions has yet to be uncovered. A fundamental difference between the two classes of explosions may be imprinted on the overall geometry of the explosion. In the context of the collapsar model, the favored model for GRBs, we may expect the optical data to trace a slow moving torus of ejecta while the radio data reveal a more collimated ejecta component. Here we propose Gemini spectroscopy of the late-time (≳ 2 months since explosion) SN emission to search for ejecta asymmetries in nearby SNe Ibc. These observations will be complemented by well-sampled radio observations which trace the fastest ejecta. By combining the optical and radio constraints we will construct for the first time a complete view of the ejecta asymmetries of SNe Ibc and, in turn, shed light on the GRB-SN connection.

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