Abstract:
Study of 'Solar magnetism' (totality of solar magnetic phenomena on idfferent scales) and its 'mechanisms' (physical processes responsible for the phenomena) is obviously essential for the advancement of solar and solar-planetary physics. Apart from that, it has presently acquired immense importance in stellar physics as a part of the study of non-radiative models of energy storage and transport.
Mechanisms of most of the solar magnetic phenomena are not fully understood owing to the uncertanities regarding the following three factors: (i) the depths at which the observed flux tubes originate, (ii) the inter-relation between the flux tubes and the large-scale field and (iii) the processes responsible for production, maintenance and periodic reversal of the large scale field.
A latest study of the preferred longitudes of sunspot activity reveals the presence of non-axisymmetric oscillations inside the sun. Such oscillations were postulated in a model providing common phenomenology for three crucial factors mantioned above but were not detected so far.
