Role of field lines in the case of an eruptive prominence

Abstract

We have analysed the old data of calcium K line solar prominences obtained at Kodaikanal. The analysis indicated that the height of the quiescent prominence on the limb increases with its lifetime. In one case of prominence eruption we found that initially the material moved upward as expected but after sometime started moving horizontally parallel to the solar surface. Th analysis of the sunspot data indicated that this change in movement direction happened because of reconnection of field lines in the solar atmosphere due to two isolated sunspot groups.