Radio emission of SN1993J. The complete picture: II. Simultaneous fit of expansion and radio light curves

TL;DR

This paper presents a comprehensive simulation model that simultaneously fits the expansion and radio light curves of supernova SN1993J, incorporating physical effects like ejecta opacity, magnetic field evolution, and circumstellar medium density changes.

Contribution

It introduces a new simulation code that accurately models supernova radio emission and expansion by including detailed physical processes and observational sensitivities.

Findings

Successful fit of all available radio data for SN1993J

Identification of evolving ejecta opacity and magnetic fields

Detection of changing circumstellar medium density profile

Abstract

We report on a simultaneous modelling of the expansion and radio light curves of SN1993J. We have developed a simulation code capable of generating synthetic expansion and radio light curves of supernovae by taking into consideration the evolution of the expanding shock, magnetic fields, and relativistic electrons, as well as the finite sensitivity of the interferometric arrays used in the observations. Our software successfully fits all the available radio data of SN 1993J with an standard emission model for supernovae extended with some physical considerations, as an evolution in the opacity of the ejecta material, a radial drop of the magnetic fields inside the radiating region, and a changing radial density profile of the circumstellar medium beyond day 3100 after explosion.