Successive injection of opposite magnetic helicity in solar active region NOAA 11928
Successive injection of opposite magnetic helicity in solar active region NOAA 11928
Understanding the nature and evolution of the photospheric helicity flux transfer is a key to reveal the role of magnetic helicity in coronal dynamics of solar active regions. Using SDO/HMI photospheric vector magnetograms and the derived flow velocity field, we computed boundary driven helicity flux with a 12 minute cadence …