Results 81 to 90 of about 3,487 (215)

Magnetic Fields in the Solar Convection Zone

Living Reviews in Solar Physics, 2009
Active regions on the solar surface are generally thought to originate from a strong toroidal magnetic field generated by a deep seated solar dynamo mechanism operating at the base of the solar convection zone.
Yuhong Fan
doaj  

Impact Plasma Amplification of the Ancient Mercury Magnetic Field

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Spacecraft measurements of Mercury indicate that it has a core dynamo with a surface field of 200–800 nT. These data also indicate that the northern hemisphere crust contains remanent magnetization likely produced by an ancient magnetic field. The inferred magnetization intensity is consistent with a wide range of paleofield strengths (0.2–50 ...
Isaac S. Narrett, Rona Oran, Yuxi Chen, Katarina Miljković, Gábor Tóth, Catherine L. Johnson, Benjamin P. Weiss   +6 more
wiley   +1 more source

Development and application of a global magnetic field evolution model for the solar corona

, 2009
Magnetic fields are fundamental to the structure and dynamics of the Sun’s corona. Observations show them to be locally complex, with highly sheared and twisted fields visible in solar filaments/prominences.
Yeates, Anthony Robinson
core  

Quasi-biennial oscillations and Rieger-type periodicities in a Babcock–Leighton solar dynamo

Astronomy & Astrophysics
Context. The Sun’s magnetic field exhibits the 11 year solar cycle as well as shorter periodicities, popularly known as the quasi-biennial oscillations (QBOs) and Rieger-type periods.
Kumar Pawan, Ravindra Belur, Chowdhury Partha, Karak Bidya Binay   +3 more
doaj   +1 more source

Variations of the solar cycle profile in a solar dynamo with fluctuating dynamo governing parameters

, 2012
Context. Solar cycles vary in their amplitude and shape. There are several empirical relations between various parameters that link the cycle’s shape and amplitude, foremost these of the Waldmeier relations. Aims.
D. D. Sokoloff, V. V. Pipin, I. G. Usoskin   +2 more
core   +1 more source

Dynamo Confinement of a Radiatively Spreading Solar Tachocline Revealed by Self-consistent Global Simulations

The Astrophysical Journal Letters
The helioseismically observed solar tachocline is a thin internal boundary layer of shear that separates the rigidly rotating solar radiative zone from the differentially rotating convective zone and is believed to play a central role in the 22-yr solar ...
Loren I. Matilsky, Lydia Korre, Nicholas H. Brummell   +2 more
doaj   +1 more source

A solar mean field dynamo benchmark [PDF]

, 2020
Context. The solar magnetic activity and cycle are linked to an internal dynamo. Numerical simulations are an efficient and accurate tool to investigate such intricate dynamical processes. Aims.
L Jouve, A Brandenburg, M Rempel, A Bonanno, M J Korpi, P Gilman, R Arlt, A G Kosovichev, P J Käpylä, A S Brun, M Dikpati, D Moss   +11 more
core  

Nonlinear mean-field dynamo and prediction of solar activity [PDF]

, 2018
We apply a nonlinear mean-field dynamo model which includes a budget equation for the dynamics of Wolf numbers to predict solar activity. This dynamo model takes into account the algebraic and dynamic nonlinearities of the$\unicode[STIX]{x1D6FC}$effect ...
Saullin, N.,, I. Rogachevskii, Safiullin, N., Kleeorin, N., Rogachevskii, Igor,, A. Ruzmaikin, N. Kleeorin, Ruzmaikin, A., Ruzmaikin, A.,, Porshnev, S.,, Saullin, N., Porshnev, S., Kleeorin, Nathan,, Rogachevskii, I., S. Porshnev, N. Safiullin   +15 more
core   +1 more source

Production of Sunspots and Their Effects on the Corona and Solar Wind: Insights from a New 3D Flux-Transport Dynamo Model

Frontiers in Astronomy and Space Sciences, 2018
We present a three-dimensional numerical model for the generation and evolution of the magnetic field in the solar convection zone, in which sunspots are produced and contribute to the cyclic reversal of the large-scale magnetic field. We then assess the
Rohit Kumar, Laurène Jouve, Rui F. Pinto, Alexis P. Rouillard   +3 more
doaj   +1 more source

A Synchronized Two-Dimensional α-Ω Model of the Solar Dynamo. [PDF]

Sol Phys, 2023
Klevs M, Stefani F, Jouve L.
europepmc   +1 more source