3 papers
astro-ph.SR2026
Magnetic Reconnection at Hyperbolic Flux Tube associated with a Confined Flare in NOAA Active Region 12268
Pawan Kumar, Sadashiv, Sanjay Kumar +3
In this paper, we identify the magnetic reconnections at the hyperbolic flux tube (HFT), aided by slipping reconnection at quasi-separatrix layers (QSLs), which are pivotal to the…
astro-ph.SR2025
Quasi-Biennial Oscillations and Rieger-type Periodicities in a Babcock-Leighton Solar Dynamo
Pawan Kumar, Belur Ravindra, Partha Chowdhury +1
The Sun's magnetic field shows the 11-year solar cycle and shorter periodicities, popularly known as the quasi-biennial oscillations (QBOs) and Rieger-type periods, or ``season of…
astro-ph.SR2025
Analyses of features of magnetic cycles at different amounts of dynamo supercriticality: Solar dynamo is about two times critical
Sanket Wavhal, Pawan Kumar, Bidya Binay Karak
The growth of a large-scale magnetic field in the Sun and stars is usually possible when the dynamo number (D) is above a critical value Dc. As the star ages, its rotation rate and…