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. The distribution of ages yields an SNR birth rate. The energies and densities are well fit with lognormal distributions, with wide dispersions. SNRs with two emission components are used to distinguish between SNR models with uniform interstellar medium and with stellar wind environment. We find Type Ia SNRs to be consistent with a stellar wind environment. Inclusion of stellar wind SNR models has a significant e...

中文翻译：

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具有距离和X射线光谱的43个银河超新星残余的演化模型

来自超新星残余物（SNR）的X射线发射是震荡等离子体状态的有力诊断。冲击气体的温度（kT）和排放量（EM）与爆炸的能量，SNR的寿命以及周围介质的密度有关。X射线SNR观测的进展已导致大量银河SNR样本具有测量的kT和EM值。我们将球对称SNR演化模型应用于一组新的43 SNR，以估计年龄，爆炸能量和星际介质密度。年龄分布产生SNR出生率。能量和密度非常符合对数正态分布，且色散较宽。具有两个发射分量的SNR用于区分具有均匀星际介质和恒星风环境的SNR模型。我们发现Ia型SNR与恒星风环境一致。包含恒星风信噪比模型具有重大意义...