THE EMERGENCE OF CURRENT-CARRYING MAGNETIC LOOPS INTO THE SOLAR CORONA

The mechanism of the dynamic emergence of current-carrying magnetic lo ops into the corona is examined by three-dimensional MHD simulations. By simultaneously modeling the spacetime profiles of the normal compon ents of the emerging magnetic held and current density on the photosph ere, we demonstrate that this process can qualitatively reproduce obse rvations that show the emergence of a helically twisted magnetic struc ture with a suitable held-current combination. The flux-tube structure rises into the initially nearly field-free corona and gradually relax es into a nearly force-free, steady state, magnetic loop.