Deciphering the Deep Origin of Active Regions via Analysis of Magnetograms

0550200 - ASÚ 2022 RIV GB eng J - Článek v odborném periodiku
Dikpati, M. - McIntosh, S. W. - Chatterjee, S. - Norton, A. A. - Ambrož, Pavel - Gilman, P. A. - Jain, K. - Munoz-Jaramillo, C.
Deciphering the Deep Origin of Active Regions via Analysis of Magnetograms.
Astrophysical Journal. Roč. 910, č. 2 (2021), č. článku 91. ISSN 0004-637X. E-ISSN 1538-4357
Institucionální podpora: RVO:67985815
Klíčová slova: solar activity * solar storm * solar active regions
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 5.521, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.3847/1538-4357/abe043

In this work, we derive magnetic toroids from surface magnetograms by employing a novel optimization method, based on the trust region reflective algorithm. The toroids obtained in this way are combinations of Fourier modes (amplitudes and phases) with low longitudinal wavenumbers. The optimization also estimates the latitudinal width of the toroids. We validate the method using synthetic data, generated as random numbers along a specified toroid. We compute the shapes and latitudinal widths of the toroids via magnetograms, generally requiring several m's to minimize residuals.
Trvalý link: http://hdl.handle.net/11104/0325976