3 papers
astro-ph.SR2026
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…
astro-ph.SR2025
Observed Joys law of Bipolar Magnetic Region tilts at the emergence supports the thin flux tube model
Anu Sreedevi, Bidya Binay Karak, Bibhuti Kumar Jha +2
Bipolar sunspots, or more generally, Bipolar Magnetic Regions, BMRs, are the dynamic magnetic regions that appear on the solar surface and are central to solar activity. One striki…
astro-ph.SR2025
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…