论文标题
在重新连接供电的耀斑期间极化波动的第一原则模型
A First-Principle Model for Polarization Swings during Reconnection-Powered Flares
论文作者
论文摘要
我们表明，磁为主导的快速冷却血浆中的磁重新连接可以自然产生明亮的耀斑，并伴随着同步载体极化载体中的旋转。通过重新连接的粒子中的粒子模拟，我们发现耀斑由合并磁通绳或“浆液质”的界面上有效的颗粒加速度提供动力。加速的颗粒通过合并后的浆液流向观察者，从而逐渐照亮了具有不同天平面方向的区域，从而导致观察到的极化载体旋转。我们的结果提供了磁重新连接的证据，这是来自Blazars相对论喷射的高能耀斑的物理原因（最近的观察结果经常与极化旋转相关），并为这种耀斑提供了第一原质物理机制。
We show that magnetic reconnection in a magnetically-dominated fast-cooling plasma can naturally produce bright flares accompanied by rotations in the synchrotron polarization vector. With particle-in-cell simulations of reconnection, we find that flares are powered by efficient particle acceleration at the interface of merging magnetic flux ropes, or "plasmoids". The accelerated particles stream through the post-merger plasmoid towards the observer, thus progressively illuminating regions with varying plane-of-sky field direction, and so leading to a rotation in the observed polarization vector. Our results provide evidence for magnetic reconnection as the physical cause of high-energy flares from the relativistic jets of blazars (which recent observations have shown to be frequently associated with polarization rotations), and provide a first-principle physical mechanism for such flares.
