Abstract
Abstract The transition from supernovae (SNe) to supernova remnants (SNRs) remains poorly understood, given the age gap between well-studied examples of the two. In order to bridge this gap, we analyzed archival Chandra data for some of the oldest supernovae detected in X-rays, in order to extend their light curves out to late times. We fitted the spectra with thermal models. All the SNe with multiple X-ray data points were found to have similar X-ray luminosity, which was decreasing with time. The X-ray luminosity will likely continue to decrease while the SNe are evolving in a wind medium, but is anticipated to increase in the Sedov phase when the SNe are interacting with a constant density interstellar medium, bringing it in line with observed SNRs
Highlights
While both supernovae (SNe) and supernova remnants (SNRs) are well-studied objects, the transition from one to another is still poorly constrained
The X-ray luminosity will likely continue to decrease while the SNe are evolving in a wind medium, but is anticipated to increase in the Sedov phase when the SNe are interacting with a constant density interstellar medium, bringing it in line with observed SNRs
Theoretical models for the shock evolution exist, but are yet to be verified with observational evidence. This is in large part due to the fact that a considerable age gap exists between well-studied SNe and SNRs
Summary
While both supernovae (SNe) and supernova remnants (SNRs) are well-studied objects, the transition from one to another is still poorly constrained. ABSTRACT The transition from supernovae (SNe) to supernova remnants (SNRs) remains poorly understood, given the age gap between well-studied examples of the two. All the SNe with multiple X-ray data points were found to have similar X-ray luminosity, which was decreasing with time.
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