Evolutionary Models for 43 Galactic Supernova Remnants with Distances and X-ray Spectra

Understand

The X-ray emission from a supernova remnant (SNR) is a powerful diagnostic of the state of the shocked plasma.

• The temperature (kT) and the emission measure (EM) of the shocked-gas are related to the energy of the explosion, the age of the SNR, and the density of the surrounding medium.
• Progress in X-ray observations of SNRs has resulted in a significant sample of Galactic SNRs with measured kT and EM values.
• We apply spherically symmetric SNR evolution models to a new set of 43 SNRs to estimate ages, explosion energies, and circumstellar medium densities.