Fig. 4From: The Supernova – Supernova Remnant ConnectionStrong and weak emission line asymmetry in middle-aged SNe. Velocities of [O III] 4959, 5007 emission line profiles are with respect to 5007 Å. Velocities of [O II] 7319, 7330 emission line profiles are with respect to 7325 Å (Adapted from Milisavljevic et al. 2012)Back to chapter page