Radial Dependence of Extinction in Parent Galaxies of Supernovae

TL;DR

This paper investigates how extinction varies with radius in host galaxies of supernovae, proposing a radial dependence model that better explains observed dimming trends than previous inclination-based models.

Contribution

It introduces a radial dependence model for extinction in supernova host galaxies, improving understanding of supernova brightness corrections.

Findings

Dimming of supernovae correlates with decreasing radius from galaxy centers.

Radial extinction dependence provides a better fit than inclination-based models.

Sample of stripped-envelope SNe shows a clear trend of dimmer supernovae towards galaxy centers.

Abstract

The problem of extinction is the most important issue to be dealt with in the process of obtaining true absolute magnitudes of core-collapse supernovae (SNe). The plane-parallel model which gives absorption dependent on galaxy inclination, widely used in the past, was shown not to describe extinction adequately. We try to apply an alternative model which introduces radial ependence of extinction. A certain trend of dimmer SNe with decreasing radius from the center of a galaxy was found, for a chosen sample of stripped-envelope SNe.