Simplified Model of the Solar Magnetic Field

Abstract

This paper considers a structure consisting of two rings of magnetic dipoles symmetrical relative to the equatorial plane as a possible model for the source of the solar magnetic field. It shows that the magnetic field generated by this structure corresponds to Joy’s law and Hale’s polarity law. Approximate calculations show that the form and shape of the equatorial field of this structure are close to measured values, and the resulting distribution of sunspots is in agreement with Joy's law to Maunder’s butterfly diagram. Based on this structure, it is possible to explain the appearance of two peaks (Gnevyshev gap) in the distribution of sunspots at the maximum of solar activity. Calculating the polar field based on the principles of magnetic hysteresis shows a good coincidence of the calculated and measured values and makes it possible to predict the behavior of the polar field in the interval to the nearest minimum of solar activity. Analyzing dipole nutation makes it possible to predict the intensity of the upcoming solar activity maxima, while a nutation period of approximately 8 months can be associated with 1.3 yr-period field oscillations. Despite the fact that the emergence and the functioning of the proposed configuration of magnetic dipoles is considered in a simplified manner and only from the point of view of gyromagnetic and thermal forces for speed and clarity, this does not limit the use of the proposed structure as a potential model in other, more global-scale general hydromagnetic theories of solar magnetism.