船帆座多波长辐射的CR-hydro-NEI模型超新星遗迹（SNR RX.0-4622）
A CR-hydro-NEI Model of Multi-wavelength Emission from the Vela Jr. Supernova Remnant (SNR RX J0852.0-4622)
摘要：
主要基于能量预算的考虑和观测到的宇宙射线（CR）离子组成，超新星遗迹（SNR）爆炸波是最有可能的CR离子的来源，能量至少达到近3 PeV的“膝盖”。年轻的壳型TeV亮SNR中的冲击肯定会产生TeV粒子，但发射可能由产生中性π介子衰变发射的离子或产生逆康普顿γ射线的电子主导。明确地识别特定SNR中的GeV-TeV发射过程不仅有助于确定CR的起源，还将大大增加我们对扩散冲击加速（DSA）机制的理解，并提高我们对超新星的理解以及SNR对星周介质的影响。在这项研究中，我们调查了Vela Jr. SNR，TeV亮非热SNR的示例。我们进行流体动力学模拟耦合非线性DSA和非平衡电离附近的前向冲击波（FS），以面对目前可用的多波长数据。我们发现，与先前使用的SNR RX J1713.7-3946，自洽建模的热X射线线发射与非热连续在我们的一维模型强烈约束的拟合参数，这令人信服地导致一个轻子起源的GeV-TeV的Vela Jr发射的分析类似。这一结论进一步支持应用额外的约束条件，从观察，包括径向亮度分布的SNR壳在TeV的伽马射线，和X射线同步辐射光谱指数的空间变化。我们将讨论我们的模型对下一代望远镜未来观测的影响。
英文摘要：
Based largely on energy budget considerations and the observed cosmic-ray (CR) ionic composition, supernova remnant (SNR) blast waves are the most likely sources of CR ions with energies at least up to the "knee" near 3 PeV. Shocks in young shell-type TeV-bright SNRs are surely producing TeV particles, but the emission could be dominated by ions producing neutral pion-decay emission or electrons producing inverse-Compton gamma-rays. Unambiguously identifying the GeV-TeV emission process in a particular SNR will not only help pin down the origin of CRs, it will add significantly to our understanding of the diffusive shock acceleration (DSA) mechanism and improve our understanding of supernovae and the impact SNRs have on the circumstellar medium. In this study, we investigate the Vela Jr. SNR, an example of TeV-bright non-thermal SNRs. We perform hydrodynamic simulations coupled with non-linear DSA and non-equilibrium ionization near the forward shock (FS) to confront currently available multi-wavelength data. We find, with an analysis similar to that used earlier for SNR RX J1713.7-3946, that self-consistently modeling the thermal X-ray line emission with the non-thermal continuum in our one-dimensional model strongly constrains the fitting parameters, and this leads convincingly to a leptonic origin for the GeV-TeV emission for Vela Jr. This conclusion is further supported by applying additional constraints from observation, including the radial brightness profiles of the SNR shell in TeV gamma-rays, and the spatial variation of the X-ray synchrotron spectral index. We will discuss implications of our models on future observations by the next-generation telescopes.
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