Dynamical Coupling of a Mean-field Dynamo and Its Wind: Feedback Loop over a Stellar Activity Cycle

We focus on the connection between internal dynamo magnetic field and stellar wind. If star has a cyclic dynamo, modulations of can affect wind, which in turn back-react boundary conditions star, creating feedback loop. have developed 2.5-dimensional numerical set-up to model this essential coupling. implemented an alpha-Omega mean-field PLUTO code, then coupled it spherical polytropic wind via interface composed four grid layers with dedicated conditions. present here close young Sun activity. First we show how allows track influence activity corona by displaying correlation cycle, coronal structure time evolution integrated quantities. Then add discuss changes observed symmetry variations. explain these terms modes : parameter regime, loop leads coupling families preferred growth quadrupolar mode. also study our helicity, that small injection dynamo. This confirms importance physically external layers, as direct impact both