Speaker
Description
First Name: Vera
Last Name: Agalianou
Affiliation: University of Ioannina
All Authors: Agalianou V. , Patsourakos S. , Archontis V.
Abstract: We study magnetic flux cancellation during the emergence of a twisted magnetic flux tube using 3D resistive MHD simulations. A non-uniformly twisted tube rises from the convection zone and produces a complex photospheric multipolar structure. In the emerging active region, two small opposite polarity magnetic patches converge and cancel along an internal polarity inversion line. We quantify a cancellation rate of ~0.1 × 10¹⁸ Mx hr⁻¹ and show that the interacting magnetic elements form concave-upward loops that reconnect low in the atmosphere. This process leads to the build-up of a highly twisted flux rope. The evolution triggers a standard jet followed by a blowout jet as the rope reconnects with the ambient open field. Our results demonstrate that flux cancellation is an efficient mechanism for flux-rope formation and for powering both standard and blowout jet activity.