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arXiv 2204.01550astro-ph.GA
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小麦哲伦星云中超新星残留粒子的物理性质

Physical Properties of the Supernova Remnant Population in the Small Magellanic Cloud

D. A. Leahy, M. D. Filipovic

摘要:

超新星遗迹的X射线辐射是对其冲击等离子体状态的有力诊断。温度和发射量与爆炸能量、残余物的年龄和周围介质的密度有关。在这里,我们提出的小麦哲伦云的残余人口的研究结果。对残骸的X射线观测取得了进展,在小麦哲伦星系中采集了20个残骸样本,并测量了温度和排放量。我们应用球对称超新星遗迹演化模型,这组遗迹,估计年龄,爆炸能量,和星周介质密度。年龄分布得出的剩余出生率为$\sim$ 1/1200岁。能量和密度与对数正态分布拟合良好,平均值分别为1.6 $\times10^{51}$ erg和0.14 cm $^{-3}$,1 $σ$分散度的能量因子为1.87,密度因子为3.06。

英文摘要:

The X-ray emission from a supernova remnant is a powerful diagnostic of the state of its shocked plasma. The temperature and the emission measure are related to the energy of the explosion, the age of the remnant, and the density of the surrounding medium. Here we present the results of a study of the remnant population of the Small Magellanic Cloud. Progress in X-ray observations of remnants has resulted in a sample of 20 remnants in the Small Magellanic Clound with measured temperatures and emission measures. We apply spherically symmetric supernova remnant evolution models to this set of remnants, to estimate ages, explosion energies, and circumstellar medium densities. The distribution of ages yields a remnant birthrate of $\sim$1/1200 yr. The energies and densities are well fit with log-normal distributions, with means of 1.6$\times10^{51}$ erg and 0.14 cm$^{-3}$, and 1$σ$ dispersions of a factor of 1.87 in energy and 3.06 in density, respectively.

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