EC-SNe from super-AGB progenitors: theoretical models vs. observations

TL;DR

This paper investigates whether electron-capture supernovae from super-AGB stars can explain certain observed sub-luminous supernovae, by modeling their configurations at explosion based on initial mass and metallicity.

Contribution

It provides a parametric model linking super-AGB progenitor configurations to observed sub-luminous supernovae, supporting the EC-SN scenario for SN2008ha and SN2008S.

Findings

Both SN2008ha and SN2008S can be explained as EC-SNe from super-AGB progenitors.

Progenitor configurations at collapse vary, affecting supernova characteristics.

Results have implications for interpreting other sub-luminous supernovae.

Abstract

Using a parametric approach, we determine the configuration of super-AGB stars at the explosion as a function of the initial mass and metallicity, in order to verify if the EC-SN scenario involving a super-AGB star is compatible with the observations regarding SN2008ha and SN2008S. The results show that both the SNe can be explained in terms of EC-SNe from super-AGB progenitors having a different configuration at the collapse. The impact of these results on the interpretation of other sub-luminous SNe is also discussed.