Description
I will present an investigation into the circumstellar material (CSM) surrounding simulated progenitors of Type Ib/cn supernovae (SNe), using models from the Binary Populations and Spectral Synthesis (BPASS) code. Type Ib/cn SNe are rare, and due to the limited observational data, their progenitor systems remain poorly understood. Their spectra reveal signatures of dense CSM, but the origins of this material are uncertain, with multiple competing models, e.g. very massive WR stars with fallback, or highly-stripped binary systems.. BPASS simulates the evolution of stellar populations up to their deaths, allowing us to track the formation and properties of CSM at the time of explosion. By identifying which progenitors generate the necessary CSM for a Type Ib/cn event, we can gain insight into the origins of these supernovae and the environments in which they are most likely to occur. In addition by using the simulated CSM profiles to model the resulting observed properties of the SNe we can compare these to actual observations to improve our insight into specific Ib/cn progenitors.
