二次元平衡解下における磁気リコネクション：３次元ハイブリッドシミュレーション

*宮城 幸子[1], 藤本 正樹[1], 中村 雅夫[2]

東京工業大学[1]
京都大学宙空電波科学研究センター[2]

Three-dimensional hybrid simulations of magnetic reconnection in a two-dimensional magnetotail-like equilibria

*Sachiko Miyagi[1] ,Masaki Fujimoto [1],Masao Nakamura [2]
Tokyo Institute of Technology[1]
Radio Science Center for Space & Atmosphere, Kyoto University[2]

Understanding the dynamics of reconnection jet in the near-Earth magnetotail requires the effects of the Bz component to be included appropriately. In this study,we have conducted three-dimensional hybrid simulations of magnetic reconnection in a two-dimensional magnetotail-like equilibria.
Our focus here is on the effects of the width of X-line (Ry),which is controlled by the dawn-dusk extent of the anomalous resistive region in our simulations. We find the shape of the earthward reconnection jets to change according to Ry.
A sequence of field-aligned current patterns on the cross-tail section plane at the earthward end of the simulation box is presented and its implication to substorm observations is discussed.