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

TL;DR

This study investigates how bulges influence the radial distribution of supernovae in disc galaxies, revealing that bulges contribute to SNe Ia mainly in S0-S0/a types, while in Sa-Sm galaxies, supernovae predominantly occur in the disc.

Contribution

It provides new insights into the role of bulges in supernova distribution across different galaxy morphologies, highlighting the limited contribution of bulges in Sa-Sm galaxies.

Findings

Supernovae in Sa-Sm galaxies are mostly in the disc, not bulges.

Bulges significantly contribute to SNe Ia only in S0-S0/a galaxies.

Radial distributions of supernovae are similar in Sa-Sbc and Sc-Sm 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.