Remnant masses from 1D+ core-collapse supernovae simulations: Bimodal neutron star mass distribution and black holes in the low-mass gap

The explosion of core-collapse supernovae leaving neutron star or black hole remnants are difficult to simulate in their full complexity. This paper shows how important features can be captured even in spherical symmetry as long as the effects of aspects of neutrino-driven convection are introduced. Performing simulations for different metallicities, the authors find a surprising bimodal mass distribution for neutron stars and black holes in the low-mass gap.