Observationally guided models for the solar dynamo and the role of the surface field

RH Cameron, M Schüssler - Space Science Reviews, 2023 - Springer
Theoretical models for the solar dynamo range from simple low-dimensional “toy models” to
complex 3D-MHD simulations. Here we mainly discuss appproaches that are motivated and …

Causality in heliophysics: magnetic fields as a bridge between the Sun's interior and the Earth's space environment

D Nandy, Y Baruah, P Bhowmik, S Dash… - Journal of Atmospheric …, 2023 - Elsevier
Our host star, the Sun, is a middle-aged main sequence G type star whose activity varies.
These variations are primarily governed by solar magnetic fields which are produced in the …

Exploring the reliability of polar field rise rate as a precursor for an early prediction of solar cycle

A Biswas, BB Karak, P Kumar - Monthly Notices of the Royal …, 2023 - academic.oup.com
The prediction of the strength of an upcoming solar cycle has been a long-standing
challenge in the field of solar physics. The inherent stochastic nature of the underlying solar …

Discovery of a relation between the decay rate of the Sun's magnetic dipole and the growth rate of the following sunspot cycle: a new precursor for solar cycle …

P Jaswal, C Saha, D Nandy - Monthly Notices of the Royal …, 2024 - academic.oup.com
Sunspots have been observed for over four centuries and the magnetic nature of sunspot
cycles has been known for about a century; however, some of its underlying physics still …

Magnetic Configuration of Active Regions Associated with GLE Events

RA Suleymanova, LI Miroshnichenko, VI Abramenko - Solar Physics, 2024 - Springer
Charged particles, generated in solar flares, sometimes can attain extremely high energy,
above the 500-MeV level, and produce abrupt ground-level enhancements (GLEs) on the …

Variabilities in the polar field and solar cycle due to irregular properties of bipolar magnetic suregions

P Kumar, BB Karak, A Sreedevi - Monthly Notices of the Royal …, 2024 - academic.oup.com
Decay and dispersal of the tilted bipolar magnetic regions (BMRs) on the solar surface are
observed to produce the large-scale poloidal field, which acts as the seed for the toroidal …

Hemispheric analysis of the magnetic flux in regular and irregular solar active regions

A Zhukova - Monthly Notices of the Royal Astronomical Society, 2024 - academic.oup.com
Studying the hemispheric distribution of active regions (ARs) with different magnetic
morphologies may clarify the features of the dynamo process that is hidden under the …

Algebraic quantification of the contribution of active regions to the Sun's dipole moment: applications to century-scale polar field estimates and solar cycle forecasting

S Pal, D Nandy - Monthly Notices of the Royal Astronomical …, 2024 - academic.oup.com
The solar cycle is generated by a magnetohydrodynamic dynamo mechanism which
involves the induction and recycling of the toroidal and poloidal components of the Sun's …

Surface Flux Transport Modeling Using Physics-informed Neural Networks

JJ Athalathil, B Vaidya, S Kundu… - The Astrophysical …, 2024 - iopscience.iop.org
Studying the magnetic field properties on the solar surface is crucial for understanding the
solar and heliospheric activities, which in turn shape space weather in the solar system …

Exploring the predictability of the solar cycle from the polar field rise rate: Results from observations and simulations

A Biswas - Proceedings of the International Astronomical Union, 2023 - cambridge.org
The inherent stochastic and nonlinear nature of the solar dynamo makes the strength of the
solar cycles vary in a wide range, making it difficult to predict the strength of an upcoming …