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首页> 外文会议>International astrophysics forum >Relaxation and Heating Triggered by Nonlinear Kink Instability: Application to Solar Flares and Coronal Heating
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Relaxation and Heating Triggered by Nonlinear Kink Instability: Application to Solar Flares and Coronal Heating

机译：由非线性扭结不稳定触发的放松和加热：太阳能耀斑和冠状加热的应用

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摘要

Energy release and particle acceleration in kink-unstable twisted coronal loops are discussed. If the magnetic field in a coronal loop is sufficiently strongly twisted, it may become unstable to the ideal kink instability. We present results of 3D MHD simulations which show that in the nonlinear phase of the instability, current sheets form in which magnetic reconnection rapidly dissipates magnetic energy. In the later phase, the current sheet fragments. The energy release is well-modelled by a helicity conserving relaxation to a minimum energy state. We exploit this in order to calculate a distribution of energy-release events, and show how this is relevant to the solar coronal heating problem. Using test particle approach coupled with 3D MHD simulations, we also show how the electric fields associated with the fragmented currents sheet can efficiently accelerate charged particles. This has implications for the origin of high-energy particles in solar flares.
机译：讨论了扭结的扭曲冠状环中的能量释放和粒子加速度。如果冠状循环中的磁场足够强烈地扭曲，则它可能变得不稳定到理想的扭结不稳定。我们呈现3D MHD模拟的结果，其示出了在不稳定性的非线性相位中，当前纸张形式，其中磁性重新连接迅速消散磁能。在后期，当前片碎片。能量释放通过螺旋度保存弛豫良好地建模到最小能量状态。我们利用这一点，以计算能量释放事件的分布，并展示了与太阳冠的加热问题相关的。使用测试粒子方法与3D MHD仿真相结合，我们还展示了与碎片电流板相关的电场如何有效地加速带电粒子。这对太阳耀斑的高能粒子起源具有影响。

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