Average motion of emerging solar active region polarities
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DOI: 10.1051/0004-6361/201937322
Abstract: Context. The tilt of solar active regions described by Joy’s law is essential for converting a toroidal field to a poloidal field in Babcock-Leighton dynamo models. In thin flux tube models the Coriolis force causes… read more here.
Keywords: angle; flux; tilt angle; joy law ... See more keywords
Comparison Between Cycle-to-Cycle Variations in the Coefficient of Joy’s Law and Covariance of Rotation Residuals and Meridional Motions of Sunspot Groups
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DOI: 10.1093/mnras/staf409
Abstract: The tilts of bipolar magnetic regions are believed to be caused by the action of Coriolis force on rising magnetic flux tubes. Here we analysed the combined Greenwich and Debrecen observatories sunspot-group data during the… read more here.
Keywords: sunspot groups; covariance; joy law; cycle ... See more keywords