The impact of bars on the radial distribution of supernovae in disc galaxies

TL;DR

This study investigates how bars in disc galaxies influence the radial distribution of supernovae, revealing that bars significantly affect core-collapse supernovae in early-type spirals but not in late-type ones.

Contribution

It provides new insights into the role of bars in shaping supernova distributions, highlighting differences between galaxy types and supernova types.

Findings

Bars suppress massive star formation in early-type spirals, affecting core-collapse SNe distribution.

Radial distribution of SNe Ia is unaffected by bars across galaxy types.

Core-collapse SNe are more centrally peaked in unbarred early-type spirals.

Abstract

We present an analysis of the impact of bars 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-Sbc galaxies, the radial distribution of core-collapse (CC) SNe in barred hosts is inconsistent with that in unbarred ones, while the distributions of SNe Ia are not significantly different. At the same time, the radial distributions of both types of SNe in Sc-Sm galaxies are not affected by bars. We propose that the additional mechanism shaping the distributions of Type Ia and CC SNe can be explained within the framework of substantial suppression of massive star formation in the radial range swept by strong bars, particularly in early-type spirals. The radial distribution of CC SNe in unbarred Sa-Sbc galaxies is more centrally peaked and inconsistent with that in unbarred Sc-Sm hosts, while the distribution of SNe Ia in unbarred galaxies is not affected by host morphology. These results can be explained by the distinct distributions of massive stars in the discs of early-and late-type spirals.