Anomalous scaling laws of intensity fluctuations in the solar photosphere

The photospheric intensity field, obtained from THEMIS-IPM observations, is analysed. We investigate the scaling behavior of intensity fluctuations, f ollowing an approach which is used in the study of passive scalar fluctuati ons in fully turbulent flows. By means of the methods which are applied in the study of multifractal measures, it is shown that the intensity fluctuat ions are characterised by anomalous scaling laws, identified by defining a dissipation field in analogy with the dissipation of passive scalar fluctua tions in fluids. It is shown, finally, that this field is more intermittent in the higher photospheric layers than in the lower ones.