The role of helicity injection and poloidal magnetic field in a breakout CME

Abstract

Coronal mass ejections (CMEs) profoundly impact space weather, necessitating a comprehensive understanding of their initiation and evolution in the solar corona. Solar Cycle 24 exhibited reduced sunspot numbers and heliospheric magnetic pressure compared to Solar Cycle 23, leading to increased weaker CME occurrences. Accurate forecasting relies on global magnetic parameters like those from SHARP datasets. We used MPI-AMRVAC to conduct numerical simulations employing the Breakout model in a multipolar magnetic field configuration embedded within a dipolar background. Shear-induced initiation of CMEs was studied to assess the influence of the global poloidal magnetic field on eruptions. Our research investigates the evolution of magnetic parameters under different scenarios (failed, single, multiple eruptions) by varying helicity injection. Findings suggest a stronger poloidal magnetic field inhibits CMEs, and the rate of absolute net current helicity may provide a clear picture of CME eruption.