Name: Akash Biswas
Affiliation: Indian Institute of Technology (BHU), Varanasi
Conference ID : ASI2022_105
Title : Toroidal flux loss due to flux emergence explains why all solar cycles decay in the same way
Authors : Akash Biswas, Bidya Binay Karak, R. H. Cameron
Abstract Type: Poster
Abstract Category : Sun and the Solar System
Abstract : At the beginning of the solar cycle, sunspots appear around the mid-latitudes and as the cycle progresses, the activity belt of sunspots gradually migrate towards the equator. At a span of time, the distribution of sunspot over the latitudes show a Gaussian-like pattern. Different cycles begin at different latitudes and reach their maximum strength at different rates following the Waldmeier rule. The stronger cycles reach their peaks at higher latitudes than the waker ones. However, all cycles decay at the same rates. Thus stronger cycles begin to decay at higher latitudes. The widths of these latitudinal distributions of the sunspots also evolve in a similar fashion. In this work, we present a theoretical understanding of these observational features using a Babcock-Leighton type solar dynamo model. We also put some constrain on the strength of the equipartition value of the magnetic field and the variation of the meridional flow.