The Issue with Diffusive Shock Acceleration
The Issue with Diffusive Shock Acceleration
复制标题
扩散冲击加速的问题
DOI：
10.22323/1.358.0209
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
C. Haggerty
中科院分区：
文献类型：
--
作者：
D. Caprioli;C. Haggerty
我们讨论了扩散激波加速（DSA）理论的最新发展，通过使用第一原理动力学等离子体模拟和解析理论的基础上的对流/扩散方程的解决方案。
特别是，我们展示了如何模拟显示，加速粒子的光谱是显着陡峭的比$E^{-2}$预测的DSA强冲击的标准理论，在协议与几个观测证据。
我们挑出来的标准假设的测试粒子和非线性DSA违反强（自生）磁湍流的存在下，并提出了一个新的理论，更好地与推断的粒子光谱与多波长观测年轻的SN遗迹，无线电SNe，和银河宇宙射线。
We discuss the recent developments in the theory of diffusive shock acceleration (DSA) by using both first-principle kinetic plasma simulations and analytical theory based on the solution of the convection/diffusion equation.
In particular, we show how simulations reveal that the spectra of accelerated particles are significantly steeper than the $E^{-2}$ predicted by the standard theory of DSA for strong shocks, in agreement with several observational pieces of evidence.
We single out which standard assumptions of test-particle and non-linear DSA are violated in the presence of strong (self-generated) magnetic turbulence and put forward a novel theory in better agreement with the particle spectra inferred with multi-wavelength observations of young SN remnants, radio-SNe, and Galactic cosmic rays.
影响因子：
2.5
作者：
Caprioli, Damiano;Zhang, Horace;Spitkovsky, Anatoly
通讯作者：
Spitkovsky, Anatoly