Supernova-induced binary-interaction-powered supernovae: a model for SN2022jli

TL;DR

This paper models a supernova scenario where ejecta impact a companion star, causing accretion-powered light curve undulations, successfully explaining features of SN2022jli and related supernovae.

Contribution

It introduces a 3D hydrodynamical model for supernovae with binary interaction, explaining light curve features and undulations not previously modeled in detail.

Findings

Simulations reproduce SN2022jli's decline and undulations

High accretion rates require specific binary eccentricity

Parameter variations can explain other supernovae features

Abstract

We present 3D hydrodynamical modelling of supernova-induced binary-interaction-powered supernovae; a scenario proposed for the peculiar type Ic supernova SN2022jli. In this scenario, supernova ejecta of a stripped-envelope star impact a close-by stellar companion, temporarily inflating the envelope. The expanded envelope engulfs the neutron star, causing strong mass accretion at super-Eddington rates. Feedback from the accretion powers the supernova light curve with periodic undulations. Our simulations capture key features of SN2022jli, both the overall decline and the superimposed undulations of the light curve. Based on our parameter study, we find that (i) the accretion feedback should be sufficiently geometrically confined and (ii) the eccentricity of the post-supernova binary orbit should be $0.8\lesssim e\lesssim0.9$ to sustain a high accretion rate and match the low undulation amplitude ($\Delta L/L\sim0.1$) of SN2022jli. Different combinations of parameters could account for other supernovae like SN2022mop, SN2009ip and SN2015ap, which have varying undulation periods and amplitudes. We also discuss possible explanations for other key features of SN2022jli such as the $\gamma$-ray detection at $\sim200~\mathrm{d}$ and the rapid optical drop at $\sim250~\mathrm{d}$. Finally, we speculate on the future evolution of the system and its relation to existing neutron star binaries.