10 papers
Large ephemeral regions and their tilt angles
Rambahadur Gupta, Anu Sreedevi, Bibhuti Kumar Jha +1
The ephemeral regions (ERs), which are short-lived bipolar magnetic regions that emerge across the solar cycle but do not appear as sunspots, play a crucial role in the Sun's magne…
Solar Cycle Prediction: Challenges, Progress, and Future Perspectives
Bidya Binay Karak
Reliable prediction of the solar cycle is a formidable challenge, yet it is increasingly vital in our technology-dependent society as solar activity drives space weather. Various m…
Variation of the sunspot area during the rising and declining phases of the solar cycle supports the toroidal flux loss due to flux emergence
Bidya Binay Karak, Soumya Mishra, Anu Sreedevi
Sunspots are obvious observable manifestations of the toroidal magnetic field generated through the dynamo in the convection zone. They appear in different sizes, having a wide dis…
Backtracking Bipolar Magnetic Regions to their emergence: Two groups and their implication in the tilt measurements
Anu Sreedevi, Bidya Binay Karak, Bibhuti Kumar Jha +2
Bipolar Magnetic Regions (BMRs) that appear on the solar photosphere are surface manifestations of the Suns internal magnetic field. With modern observations and continuous data st…
Does the Babcock-Leighton dynamo operate in rapidly rotating solar-type stars? Exploration using a 3D dynamo model at different rotation rates
Vindya Vashishth, Bidya Binay Karak
The Babcock-Leighton dynamo, which relies on the generation of a poloidal field through the decay and dispersal of tilted bipolar magnetic regions (BMRs), is a promising paradigm f…
Stellar cycle variability in Mount Wilson stars and dynamo models: Rotation rate and dynamo number dependency
Suyog Garg, Bidya Binay Karak, Rohan B. Mandrai
Similar to the solar cycle, the magnetic cycles of other solar-type stars are also variable. How the variability of the stellar cycle changes with the rotation rate or the dynamo n…