A sheet description of the emission from middle-aged supernova remnants
A sheet description of the emission from middle-aged supernova remnants
复制标题
中年超新星遗迹发射的表格描述
DOI：
10.1086/165049
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
J. J. Hester
中科院分区：
文献类型：
--
作者：
J. J. Hester
假设片状激波锋传播到沉浸在相当均匀的云间介质中的大云中，可以提供一致的图像，说明天鹅座环路信噪比的基本上所有观测数据。细丝被解释为片材部分的视线投影。冲击速度沿视线的投影的变化自然会导致与观察一致的湍流速度。提出并展示了一个大的、扭曲的、崎岖不平的激波前沿的模拟模型，可以产生所观察到的遗迹突出光学丝的形态。与观察到的形态的比较支持这样的观点：光发射区域位于壳体的局部外边界上并且没有被爆炸波吞没。当冲击波遇到预激波介质时，会产生明亮的 X 射线发射，该介质的中间密度高于残余物绝热部分的平均密度，但仍低于激波产生辐射所需的密度。 43 参考文献。
The hypothesis that sheetlike shock fronts propagating into large clouds immersed in a fairly uniform intercloud medium can provide a consistent picture accounting for essentially all the observational data for the Cygnus Loop SNR is considered. Filaments are interpreted as line-of-sight projections of portions of the sheet. Variations in the projection of the shock velocity along the line of sight lead naturally to turbulent velocities consistent with observation. An analog model of a large, distorted, bumpy shock front is presented and shown to produce the observed morphology of the remnant's prominent optical filaments. Comparison with the observed morphology supports the idea that regions of optical emission lie on the local outer boundary of the shell and have not been engulfed by the blast wave. Bright X-ray emission arises when the blast wave encounters a preshock medium with an intermediate density higher than average for the adiabatic portion of the remnant, but still lower than that required for the shock to become radiative. 43 references.