3 papers
astro-ph.SR2026
A Modified Multi-Level Tracking Scheme for the Detection of Sunspot Umbral Dots
Rohan Eugene Louis, Amit Chaturvedi
Umbral dots (UDs) are small-scale convective intrusions in the umbral core of sunspots and pores. Different methods have been used in the past to determine the physical properties…
astro-ph.SR2025
A Statistical Study of delta-Sunspots from Solar Cycle 23 to 25
Rohan E. Louis
Sunspots or active regions (ARs) with a delta-magnetic configuration are known to be associated with strong eruptions such as flares and mass ejections. This article investigates t…
astro-ph.SR2018
Inference of magnetic fields in the very quiet Sun
M. J. Mart\' inez González, A. Pastor Yabar, A. Lagg +29
We present high-precision spectro-polarimetric data with high spatial resolution (0.4) of the very quiet Sun at 1.56m obtained with the GREGOR telescope to shed some light o…