# The Distribution of Supernovae Relative to Spiral Arms of Host Disc Galaxies

## TL;DR

This study examines the spatial distribution of different supernova types relative to spiral arms in host galaxies, revealing links between supernova progenitors and their locations within galaxy structures.

## Contribution

It provides new insights into how spiral arm shocks influence star formation and supernova distribution, especially distinguishing between grand-design and non-grand-design galaxies.

## Key findings

- Core-collapse SNe are more concentrated near leading edges of spiral arms in GD galaxies.
- SNe Ibc are closer to the leading edges than SNe II, indicating more massive progenitors.
- SNe Ia are symmetrically distributed, consistent with older, less massive progenitors.

## Abstract

Using a sample of 215 supernovae (SNe), we analyse their positions relative to the spiral arms of their host galaxies, distinguishing grand-design (GD) spirals from non-GD (NGD) galaxies. Our results suggest that shocks in spiral arms of GD galaxies trigger star formation in the leading edges of arms affecting the distributions of core-collapse (CC) SNe (known to have short-lived progenitors). The closer locations of SNe Ibc vs. SNe II relative to the leading edges of the arms supports the belief that SNe Ibc have more massive progenitors. SNe Ia having less massive and older progenitors, show symmetric distribution with respect to the peaks of spiral arms.