Evolution of Main-Sequence-like Surviving Companions in Type Ia Supernova Remnants

TL;DR

This study uses hydrodynamic simulations to explore the evolution of potential surviving main-sequence companions in Type Ia supernova remnants, addressing observational non-detections and the effects of spin-up/spin-down models.

Contribution

It provides a comprehensive parameter space analysis and universal relations for surviving companions, advancing understanding of their detectability and properties.

Findings

Surviving companions may be low mass, short separation, or from stronger explosions.

Universal relations describe mass stripping, kick velocity, and heating effects.

Results suggest non-detections could be due to specific binary configurations.

Abstract

Recent theoretical and numerical studies of Type Ia supernova explosion within the single-degenerate scenario suggest that the non-degenerate companions could survive during the supernova impact and could be detectable in nearby supernova remnants. However, observational efforts show less promising evidence on the existence of surviving companions from the standard single-degenerate channels. The spin-up/spin-down models are possible mechanisms to explain the non-detection of surviving companions. In these models, the spin-up phase could increase the critical mass for explosion, leading to a super-Chandrasekhar mass explosion, and the spin-down phase could lead to extra mass loss and angular momentum redistribution. Since the spin-down timescale for the delayed explosion of a rotating white dwarf is unclear, in this paper, we explore a vast parameter space of main-sequence-like surviving companions via two-dimensional hydrodynamic simulations of supernova impact and the subsequent stellar evolution of surviving companions. Tight universal relations to describe the mass stripping effect, supernova kick, and depth of supernova heating are provided. Our results suggest that the not-yet detected surviving companions from observations of nearby Type Ia supernova remnants might favor low mass companions, short binary separation, or stronger supernova explosion energies than the standard singe-degenerate channels.