The Impact of Bulges on the Radial Distribution of Supernovae in Disc Galaxies

Abstract

We present the results of the analysis of the impact of bulges on the radial distributions of the different types of supernovae (SNe) in the stellar discs of host galaxies with various morphologies. We find that in Sa-Sm galaxies, all core-collapse (CC) and vast majority of SNe Ia belong to the disc, rather than the bulge component. The radial distribution of SNe Ia in S0-S0/a galaxies is inconsistent with their distribution in Sa-Sm hosts, which is probably due to the contribution of the outer bulge SNe Ia in S0-S0/a galaxies. The radial distributions of both types of SNe are similar in all the subsamples of Sa-Sbc and Sc-Sm galaxies. These results confirm that the old bulges of Sa-Sm galaxies are not significant producers of Type Ia SNe, while the bulge populations are significant for SNe Ia only in S0-S0/a galaxies.