Supernova Remnant Evolution in Wind Bubbles: A Closer Look at Kes 27

TL;DR

This paper investigates the evolution of the supernova remnant Kes 27 within a wind-blown bubble, analyzing its properties and challenging previous assumptions about its environment and development.

Contribution

The study provides a detailed analysis of Kes 27's properties and questions prior claims that it evolves within a wind-blown bubble, offering new insights into its environmental context.

Findings

Initial models do not support the wind-blown bubble hypothesis

Reflected shock expands into lower-density regions

Results suggest alternative environmental scenarios for Kes 27

Abstract

Massive Stars (> 8 solar masses) lose mass in the form of strong winds. These winds accumulate around the star, forming wind-blown bubbles. When the star explodes as a supernova (SN), the resulting shock wave expands within this wind-blown bubble, rather than the interstellar medium. The properties of the resulting remnant, its dynamics and kinematics, the morphology, and the resulting evolution, are shaped by the structure and properties of the wind-blown bubble. In this article we focus on Kes 27, a supernova remnant (SNR) that has been proposed by Chen et al (2008) to be evolving in a wind-blown bubble, explore its properties, and investigate whether the properties could be ascribed to evolution of a SNR in a wind-blown bubble. Our initial model does not support this conclusion, due to the fact that the reflected shock is expanding into much lower densities.