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