Periodicities in the Sun's "Torsional MHD oscillations" and planetary configurations

Abstract

Recently, we studied the rotaion of sunspot gruoups during 1879-1976 and detected ~ 22-yr and a few more other periods 'even' and 'odd' parity torsional oscillations of the Sun (Javaraiah & Gokhale 1995a, b). In the present paper we show that the amplitudes of these torsional oscillations of the Sun depend upon the temporal variation in the latitude (celestial) distribution of angular momentum of the solar system.