9 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…
Addressing Known Challenges in Solar Flare Forecasting I: Limb-Flare Prediction with a 4-pi Full-Heliosphere Framework
K. D. Leka, Eric L. Wagner, Lisa Upton +3
A demonstrated failure mode for operational solar flare forecasting is the inability to forecast flares that occur near, or just beyond, the solar limb. To address this shortcoming…
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…
Historical Reconstruction of Solar Surface Magnetism from Cycle 1-24 Using the Synthetic Active Region Generator (SARG) and the Advective Flux Transport (AFT) Model
Bibhuti Kumar Jha, Lisa A. Upton, Greg Kopp +1
The historical reconstruction of the Sun's surface magnetic field remains a persistent challenge, limiting our ability to investigate the long-term global properties of the Sun, in…
Machine Learning Based Identification of Solar Disk and Plages in Kodaikanal Solar Observatory Historical Suncharts
Dibya Kirti Mishra, Subhamoy Chatterjee, Bibhuti Kumar Jha +6
Kodaikanal Solar Observatory (KoSO) is one of the oldest solar observatories, possessing an archive of multi-wavelength solar observations, including white light, Ca II K, and H-al…
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…