Type Ic supernovae in GRBs: A vital clue in understanding the progenitor?

摘要

The Supernova (SN)/Gamma-Ra,y Burst (GRB) association is one of the primary pieces of evidence supporting the collapsar (collapse of a massive star) mechanism behind long-duration GRBs. Observation of the SNe associated with GRBs has also brought us a very strong constraint on GRB progenitors. This constraint is simply stated: only Type Ic supernovae are associated with GRBs, but what, this statement means for progenitors is not so simple. Here we discuss how this constraint affects the proposed progenitor scenarios, paying particular attention to the single-star models.