Orientation of the linear polarization plane of H-alpha emission in prominences
2D distributions of deviations of the polarization plane from the direction tangential to the solar limb (angle χ) and the sign of χare presented for Hα prominences of March 29, 2006. The obtained values of χare in agreement with non-eclipse coronagraphic measurements and indicate the existence of longitudinal magnetic fields. The 2D distributions of the sign of χshow the existence of both «+» and «-» polarities for each prominence. An interpretation in the frame of the existence of oppositely directed magnetic fields is noted.
astro-ph.SR↗