Pre-collapse Properties of Superluminous Supernovae and Long Gamma-Ray Burst Progenitor Models

Understand

We analyze the properties of 42 rapidly rotating, low metallicity, quasi-chemically homogeneously evolving stellar models in the mass range between 4 and 45 $\,\mathrm{M}_\odot$ at the time of core collapse.

• Such models were proposed as progenitors for both superluminous supernovae (SLSNe) and long duration gamma-ray bursts (lGRBs), and the Type Ic-BL supernovae (SNe) that are associated with them.
• Our findings suggest that whether these models produce a magnetar driven SLSN explosion or a near-critically rotating black hole (BH) is not a monotonic function of the initial mass.
• Rather, their explodability varies non-monotonically depending on the late core evolution, once chemical homogeneity is broken.