Statistical study of the north–south asymmetry of the solar differential rotation based on various solar structures during 1966–1985

摘要: The time variation and latitude dependence of the solar rotation are found using observational data on Hα filaments compact magnetic features with different polarities during activity cycles 20 21 (1966–1985). Statistical analysis shows that there is a north–south asymmetry in rotation, both for (structures) negative positive polarities. N-S differential up quite distinctly 21, but polarity comparatively lower cycle 21. confidence level than polarity.