The X-ray/radio and UV luminosity expected from symbiotic systems as the progenitor of SNe Ia

TL;DR

This study models the X-ray, radio, and UV emissions from symbiotic systems as progenitors of Type Ia supernovae, finding detectable signals mainly from WD + AGB systems and constraining progenitor scenarios with observations.

Contribution

It introduces detailed binary evolution calculations including tidally enhanced winds and estimates multi-wavelength emissions, providing new constraints on supernova progenitor models.

Findings

X-ray flux may be detectable for nearby SNe Ia from symbiotic systems.

Radio flux is more detectable when the companion is an AGB star.

Most symbiotic systems are excluded by X-ray observations for SNe Ia 2011fe and 2014J.

Abstract

We carried out a series of binary stellar evolution calculations, in which the effect of tidally enhanced wind on the evolution of WD + RG systems is incorporated. The WDs increase their mass to the Chandrasekhar mass limit, and then explode as SNe Ia. Based on the binary evolution results, we estimated the X-ray/radio (the excess UV) luminosity from the interactions between supernova ejecta and the CSM (the secondary) via some published standard models. We found that the X-ray flux may be high enough to be detected for a nearby SN Ia from a symbiotic system, while the radio flux is more likely to de detected when the companion is an asymptotic giant branch (AGB) star, and for a first giant branch (FGB) companion, the radio flux is generally lower than the detection limit. For two well observed SNe Ia, 2011fe and 2014J, almost all symbiotic systems are excluded by X-ray observations, but WD + FGB systems may not be ruled out by radio observations. The excess UV luminosity resulting from the collision of supernova ejecta with the RG secondary may be high enough to be detected if the secondary fills its Roche lobe at the moment of supernova explosion. The X-ray/radio emissions are more prevalent in SNe Ia from WD + AGB systems, although SNe Ia from such systems are rare. The UV luminosity from the collision of supernova ejecta to RG secondary is high enough, but only 1 in every few hundred SNe Ia manifests the signal from the collision.