Department of Physics and Astronomy, University of Delaware, Newark, 19716, USA.
Phys Rev Lett. 2011 Aug 5;107(6):065001. doi: 10.1103/PhysRevLett.107.065001. Epub 2011 Aug 1.
The propagation of reconnection signatures and their associated energy are examined using kinetic particle-in-cell simulations and Cluster satellite observations. It is found that the quadrupolar out-of-plane magnetic field near the separatrices is associated with a kinetic Alfvén wave. For magnetotail parameters, the parallel propagation of this wave is super-Alfvénic (V(∥) ∼ 1500-5500 km/s) and generates substantial Poynting flux (S ∼ 10(-5)-10(-4) W/m(2)) consistent with Cluster observations of magnetic reconnection. This Poynting flux substantially exceeds that due to frozen-in ion bulk outflows and is sufficient to generate white light aurora in Earth's ionosphere.
利用动力学粒子模拟和 Cluster 卫星观测研究了重联特征及其相关能量的传播。结果发现，在分隔线附近的四极面外磁场与一种动理学阿尔文波有关。对于磁尾参数，此波的平行传播速度超阿尔文速（V(∥)∼1500-5500km/s），并产生大量的庞廷通量（S∼10(-5)-10(-4)W/m(2)），与 Cluster 观测到的磁重联一致。此庞廷通量大大超过了由于冻结离子体的整体流出而产生的通量，足以在地球电离层中产生白光极光。
