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  • Photospheric flux density of magnetic helicity 

    Pariat, E.; Démoulin, P.; Berger, M.A. (EDP Sciences, 2005)
    Several recent studies have developed the measurement of magnetic helicity flux from the time evolution of photospheric magnetograms. The total flux is computed by summing the flux density over the analyzed region. All ...
  • What is the spatial distribution of magnetic helicity injected in a solar active region? 

    Pariat, E.; Nindos, A.; Démoulin, P.; Berger, M.A. (EDP Sciences, 2006)
    Context. Magnetic helicity is suspected to play a key role in solar phenomena such as flares and coronal mass ejections. Several investigations have recently computed the photospheric flux of magnetic helicity in active ...