超新星残余激波中扩散激波加速对非平衡电离的作用II：发射谱
The Role of Diffusive Shock Acceleration on Nonequilibrium Ionization in Supernova Remnant Shocks II: Emitted Spectra
摘要：
我们提出了一个网格的非平衡电离模型的X射线光谱超新星遗迹经历有效的扩散冲击加速。计算遵循冲击波的流体动力学以及冲击波后面的等离子体的随时间变化的电离。电离状态被传递到等离子体发射率代码来计算热X射线发射，其与来自非热同步辐射的发射相结合，以产生来自宇宙射线主导的冲击的热和非热发射的自洽模型。我们展示了如何等离子体诊断，如氦离子的G '比，定义为相互组合，禁止和卫星线的总和与共振线的比率，可以随着加速效率而变化，并讨论如何热X射线发射，当随时间变化的电离不计算自洽与流体力学，可以不同于热X射线发射的模型，其中没有考虑到流体力学。最后，我们比较的热X射线发射的模型，显示中等加速（~ 35%）的热X射线发射的测试粒子模型。
英文摘要：
We present a grid of nonequilibrium ionization models for the X-ray spectra from supernova remnants undergoing efficient diffusive shock acceleration. The calculation follows the hydrodynamics of the blast wave as well as the time-dependent ionization of the plasma behind the shock. The ionization state is passed to a plasma emissivity code to compute the thermal X-ray emission, which is combined with the emission from nonthermal synchrotron emission to produce a self-consistent model for the thermal and nonthermal emission from cosmic-ray dominated shocks. We show how plasma diagnostics such as the G'-ratio of He-like ions, defined as the ratio of the sum of the intercombination, forbidden, and satellite lines to the resonance line, can vary with acceleration efficiency, and discuss how the thermal X-ray emission, when the time-dependent ionization is not calculated self-consistently with the hydrodynamics, can differ from the thermal X-ray emission from models which do account for the hydrodynamics. Finally we compare the thermal X-ray emission from models which show moderate acceleration (~ 35%) to the thermal X-ray emission from test-particle models.
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