The Late Time Optical Evolution of Twelve Core-Collapse Supernovae: Detection of Normal Stellar Winds

M. Rizzo Smith, C. S. Kochanek, J. M. M. Neustadt

We analyze the late time evolution of 12 supernovae (SNe) occurring over the last $\sim$41 years, including nine Type IIP/L, two IIb, and one Ib/c, using UBVR optical data from t…