Background Magnetic Fields: Cellular Structure,its Rotation Variations and Relationship with Coronal Holes

By analyzing data on background magnetic fields (BMF) covering a significant portion of solar activity cycles 20 and 21, it is shown that cellular structure is characteristic for BMF, irrespective of the cycle phase. According to present views, cellular structure in the distribution of different parameters, the magnetic field in particular, can be a consequence of the mass motion of a convective or some other origin. The size, lifetime and some rotation characteristics of BMF cells are estimated experimentally.It is found that BMF cell rotation characteristics undergo cyclic variations. The character of the cyclic variations in rotation differentiality of BMF cells is in agreement with those observed for sunspots, chromospheric filaments, green corona and coronal holes. It is shown that a detailed correspondence exists between cyclic variations in rotation differentiality of BMF cells and coronal holes, which undoubtedly bears witness to the presence of a correlation between these phenomena.