Magnetic Relaxation and Particle Acceleration in a Flaring Twisted Coronal Loop
Magnetic Relaxation and Particle Acceleration in a Flaring Twisted Coronal Loop
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DOI：
10.1007/s11207-011-9900-9
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发表时间：
2012-04
期刊：
影响因子：
2.8
通讯作者：
M. Gordovskyy;P. Browning
中科院分区：
文献类型：
--
作者：
M. Gordovskyy;P. Browning
在目前的工作中，我们的目标是研究扭曲的日冕环中的粒子加速。为此，本文考虑了线性不稳定扭转磁通管中磁场重联的MHD模型。此外，在MHD模拟中获得的电场和磁场被用来计算质子和电子的轨道在引导中心近似。结果表明，在这样一个模型中，粒子加速度是相当均匀地分布沿着冕环和高能量人口保持一般中性。从模型中还可以看出，环足点附近的高能粒子所占据的体积的水平横截面随时间而增加，这可以用作观测代理。
In the present work we aim to study particle acceleration in twisted coronal loops. For this purpose, an MHD model of magnetic reconnection in a linearly unstable twisted magnetic fluxtube is considered. Further, the electric and magnetic fields obtained in the MHD simulations are used to calculate proton and electron trajectories in the guiding-centre approximation. It is shown that particle acceleration in such a model is distributed rather uniformly along the coronal loop and the high-energy population remains generally neutral. It also follows from the model that the horizontal cross-section of the volume occupied by high-energy particles near the loop footpoints increases with time, which can be used as an observational proxy.