Radial Dependence of Extinction in Parent Galaxies of Supernovae

TL;DR

This paper investigates how extinction varies with radius in supernova host galaxies, proposing a radial dependence model to improve the accuracy of supernova brightness measurements.

Contribution

It introduces a radial dependence model for extinction in supernova host galaxies, moving beyond the traditional plane-parallel approximation.

Findings

Radial dependence model better fits extinction data.

Intrinsic peak magnitude of selected SNe Ib/c is estimated as -17.80.

Comparison of two methods for Galactic extinction calculation.

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 (including stripped-envelope) supernovae (SNe). The plane-parallel model, widely used in the past, was shown not to describe extinction adequately. We try to apply an alternative model which introduces radial dependance of extinction in parent galaxies of supernovae. For calculating extinction in our Galaxy we use two different methods and compare the results obtained. Our analysis is primarily focused on a chosen sample of stripped-envelope SNe (Ib/c) for which we find intrinsic peak absolute magnitude $\mathrm{M}_{\mathrm{B}}^{0}=-17.80\pm 0.43$.