Resistive and Collisionless Magnetic Reconnection in Coronal Plasmas

9310157 Bhattacharjee这项研究继续对日冕电流片的电阻率效应进行理论研究。过去两年完成的工作带来了重大的新见解，即在小但有限的电阻率存在的情况下，电流片往往在细长的冕管中形成，以及形成的速度有多快。继续的努力将基于具有高度对称性的3D日冕平衡和广义欧姆定律，该定律不仅包括电阻率，还包括与日冕相关的其他无碰撞机制。我们将从解析和数值两方面研究分离线形成的3D平衡，因为奇点往往形成在分离线上。这些无碰撞机制的加入将带来质的新的动力学效应，并使理论更接近观测。

9310157 Bhattacharjee This research continues theoretical studies on the effect of resistivity on current sheets in the solar corona. The work completed during the last two years has led to significant new insights on where and how rapidly in time current sheets tend to form in a long, thin coronal tube in the presence of small but finite resistivity. The continuing effort will be based on 3D coronal equilibria with high symmetry and a generalized Ohm's law that includes not only resistivity but also other collisionless mechanisms of relevance to the corona. The 3D equilibria will be investigated for separatrix formation, analytically and numerically, since singularities tend to form at separatrices. The inclusion of these collisionless mechanisms will introduce qualitatively new dynamical effects and bring theory closer to observations.***