论文标题
对银河系和附近星系的X射线超新星残留物的探索
An Exploration of X-ray Supernova Remnants in the Milky Way and Nearby Galaxies
论文作者
论文摘要
我们探讨了X射线超新星残留物（SNR）在其进化过程中的各个点（尤其是S-T阶段）的环境特性，以及它们与SNR进化的理论得出的模型的一致性。残留尺寸用作残留年龄的代理。我们的数据集包括34个银河系，59个大型麦哲伦云（LMC）和5个小麦哲伦云（SMC）SNR。我们选择已确定键入的残留物为核心偏转（CC）或IA型超新星，具有明确定义的尺寸估计值，并且在整个残余物中测量了热X射线通量。提供和绘制了SNR大小和X射线光度的目录，并具有本文的环境密度和年龄估计。在Sedov-Taylor（S-T）相中，具有给定密度的模型残留物在直径-VS-Luminosity图上覆盖过多，从而可以将SNR的进化状态和物理性质相互比较，并与理论模型进行比较。我们发现，小的年轻残余物主要是IA型残余物或高光度CC，这表明直到从祖细胞中吹出的风泡中，才发现许多CC SNR。对银河系和LMC的SNR直径的分布的检查表明，LMC SNR必须在环境介质中进化，该环境介质的密度与银河系一样密集。这与银河系和LMC的环境密度估计值一致。
We probe the environmental properties of X-ray supernova remnants (SNRs) at various points along their evolutionary journey, especially the S-T phase, and their conformance with theoretically derived models of SNR evolution. The remnant size is used as a proxy for the age of the remnant. Our data set includes 34 Milky Way, 59 Large Magellanic Cloud (LMC), and 5 Small Magellanic Cloud (SMC) SNRs. We select remnants that have been definitively typed as either core-collapse (CC) or Type Ia supernovae, with well-defined size estimates, and a thermal X-ray flux measured over the entire remnant. A catalog of SNR size and X-ray luminosity is presented and plotted, with ambient density and age estimates from the literature. Model remnants with a given density, in the Sedov-Taylor (S-T) phase, are overplotted on the diameter-vs-luminosity plot, allowing the evolutionary state and physical properties of SNRs to be compared to each other, and to theoretical models. We find that small, young remnants are predominantly Type Ia remnants or high luminosity CCs, suggesting that many CC SNRs are not detected until after they have emerged from the progenitor's wind-blown bubble. An examination of the distribution of SNR diameters in the Milky Way and LMC reveals that LMC SNRs must be evolving in an ambient medium which is 30% as dense as that in the Milky Way. This is consistent with ambient density estimates for the Galaxy and LMC.
