CURRENT BUILDUP IN EMERGING SERPENTINE FLUX TUBES

摘要: The increase of magnetic flux in the solar atmosphere during active-region formation involves transport field from convection zone through lowest layers atmosphere, which plasma {beta} changes >1 to <1 with altitude. crossing this transition requires adopt a serpentine shape also known as sea-serpent topology. In frame resistive flux-emergence model, rising is believed be dynamically driven by succession reconnections are commonly observed emerging regions Ellerman bombs. Using data-driven, three-dimensional (3D) magnetohydrodynamic numerical simulation emergence occurring active region 10191 on 2002 November 16-17, we study development 3D electric current sheets. We show that these currents buildup along magnetic-field structure result photospheric diverging horizontal line-tied motions emulate evolution. observe reconnection can not only develop following pinching evolution line, usually assumed two-dimensional geometry, but shearing deformation structure. addition, report for themore » first time observation UV domain Transition Region and Coronal Explorer (TRACE) extremely transient loop-like features, appearing within domain, link several Ellermam bombs one another. argue loop transients explained consequence build up field.« less