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Algebraic Quantification of the Contribution of Active Regions to the Sun's Dipole Moment: Applications to Century-scale Polar Field Estimates and Solar Cycle Forecasting
Shaonwita Pal, Dibyendu Nandy
The solar cycle is generated by a magnetohydrodynamic dynamo mechanism which involves the induction and recycling of the toroidal and poloidal components of the Sun's magnetic fiel…
Discovery of a relation between the decay rate of the Sun's magnetic dipole and the growth rate of the following sunspot cycle: a new precursor for solar cycle prediction
Priyansh Jaswal, Chitradeep Saha, Dibyendu Nandy
Sunspots have been observed for over four centuries and the magnetic nature of sunspot cycles has been known for about a century; however, some of its underlying physics still rema…
Impact of Anomalous Active Regions on the Large-scale Magnetic Field of the Sun
Shaonwita Pal, Prantika Bhowmik, Sushant S. Mahajan +1
One of the major sources of perturbation in the solar cycle amplitude is believed to be the emergence of anomalous active regions which do not obey Hale's polarity law and Joy's la…
Physical Models for Solar Cycle Predictions
Prantika Bhowmik, Jie Jiang, Lisa Upton +2
The dynamic activity of stars such as the Sun influences (exo)planetary space environments through modulation of stellar radiation, plasma wind, particle and magnetic fluxes. Energ…
Impact of Changing Stellar and Planetary Magnetic Fields on (Exo)planetary Environments and Atmospheric Mass Loss
Sakshi Gupta, Arnab Basak, Dibyendu Nandy
The magnetic activity of a star -- which modulates the stellar wind outflow -- shapes the immediate environments of orbiting planets and induces atmospheric loss thereby impacting…
Mean field models of flux transport dynamo and meridional circulation in the Sun and stars
Gopal Hazra, Dibyendu Nandy, Leonid Kitchatinov +1
The most widely accepted model of the solar cycle is the flux transport dynamo model. This model evolved out of the traditional dynamo model which was first developed at a tim…