UBVRI griz light curves of SN 2012aw

The synow modelling of spectra indicate that the value and evolution of the photospheric velocity is similar to SN 2004et, but about ~600km/s higher than that of SNe 1999em and 1999gi at comparable epochs. This trend is more apparent in the line velocities of H{alpha} and H{beta}. A comparison of ejecta velocity properties with that of existing radiation-hydrodynamical simulations indicate that the energy of explosion lies in the range 1-2x10^51^ergs; a further comparison of nebular phase [OI] doublet luminosity with SNe 2004et and 1987A indicate that the mass of progenitor star is about 14 to 15M_{sun}_.

The presence of high-velocity absorption features in the mid-to-late plateau and possibly in early phase spectra show signs of interaction between ejecta and the circumstellar matter; being consistent with its early time detection at X-ray and radio wavebands.