Statistical analysis of magnetic field inversion in filaments with the Solar Feature Catalogues

This paper utilizes the Solar Feature Catalogues with detected filaments on the in H_α images at the Meudon Observatory in France and filament channels observed in EIT using the fast robust procedure for automatic detection of filaments and filament skeletons. The detected filaments and filament channel are examined for their co-alignment with the line-of-sight (LOS) magnetic inversion line maps obtained from the SOHO/MDI for a year 2002. The automatic procedure used to determine the LOS magnetic neutral lines with Euclidian distance transform from MDI magnetograms is presented. The statistical distribution of the angles between filament skeletons and neutral line locations as a function of a solar height, latitude and longitude is investigated for every month and whole year. The research has been supported by the European Grid of Solar Observation funded by the European Commission within IST Framework 5.