Probing the Mass-loss Histories of Type IIn and II-L Supernovae with Late-time Radio Observations

Charles D. Kilpatrick, Lindsay DeMarchi, Wen-fai Fong +3

We present VLA observations of 16 Type IIn and Type II-L supernovae (SNe IIn and SNe II-L) at ~1000--7000 days after explosion, probing circumstellar matter (CSM) at distances >10^…