Results 51 to 60 of about 22,416 (198)
Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.Abstract Extreme conditions during storms profoundly alter the evolution of equatorial plasma bubbles (EPBs), yet the key dynamics remains poorly understood. We document the rapid expansion, contraction, and decay of super EPBs in South America during the 12 November 2025 storm with Interplanetary Magnetic Field (IMF) Bz/By magnitude exceeding ∼50 nT ...
Shasha Zou +6 more
wiley +1 more source
Alfv\'en-dynamo balance and magnetic excess in MHD turbulence [PDF]
, 2016 3D Magnetohydrodynamic (MHD) turbulent flows with initially magnetic and kinetic energies at equipartition spontaneously develop a magnetic excess (or residual energy), as well in numerical simulations and in the solar wind. Closure equations obtained in
Grappin, Roland +2 more
core +4 more sources
Symposium - International Astronomical Union, 1993 The generation of the solar magnetic field is generally ascribed to dynamo processes in the convection zone. The dynamo effects, differential rotation (ω–effect) and helical turbulence (α–effect) are explained, and the basic properties of the mean–field dynamo equations are discussed in close comparison with the observed solar cycle.Especially the ...
openaire +1 more source
Temperature‐Dependent Properties of Amino‐As Based InAs/ZnSe Core‐Shell Quantum Dot Films
Advanced Optical Materials, Volume 14, Issue 10, 13 March 2026.InAs colloidal quantum dots (CQDs) exhibit tunable optical bandgap covering the near‐infrared spectrum, making them attractive for various optoelectronicapplications. This work demonstrates that their optical properties are partially maintained up to 250°C, where Atomic Force Microscopy (AFM) and Kelvin Probe Force Microscopy (KPFM) measurements reveal
Mukesh Kumar Thakur +11 more
wiley +1 more source
Flux-dominated solar dynamo model with a thin shear layer
, 2007 Flux-dominated solar dynamo models have demonstrated to reproduce the main features of the large scale solar magnetic cycle, however the use of a solar like differential rotation profile implies in the the formation of strong toroidal magnetic fields at ...
Brandenburg +14 more
core +1 more source
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 alpha effect, where the ...
Kleeorin, N. +4 more
core +1 more source
Searching for Rotational X‐Ray Modulation on TIC 277539431
Astronomische Nachrichten, Volume 347, Issue 3, March 2026.ABSTRACT TIC 277539431, a fast rotating M7 dwarf, was detected to host the highest latitude flare to date at 81°$$ {81}^{{}^{\circ}} $$. Magnetic activity like stellar flares occurring at high latitude indicate occurrence of coronal loops at these latitudes on fully‐convective M dwarfs. In contrast, sunspots usually occur below 30°$$ {30}^{{}^{\circ}} $
Desmond Dsouza +2 more
wiley +1 more source
Filaments and the Solar Dynamo [PDF]
International Astronomical Union Colloquium, 1998 AbstractFilaments are a global phenomenon and their formation, structure and dynamics are determined by magnetic fields. So they are an important signature of the solar magnetism. The central mechanism in traditional mean-field dynamo theory is the alpha effect and it is a major result of this theory that the presence of kinetic or magnetic helicities ...
openaire +2 more sources
Enhancing Low‐Latitude Ionospheric Irregularity Prediction With Generalized Linear Models
Space Weather, Volume 24, Issue 3, March 2026.Abstract The ionosphere poses challenges for accurate forecasting due to its complexity and variability. Irregularities in the lower ionosphere are influenced by local time, season, geographic location, solar activity and space weather, complicating precise predictions.
Alysson Brhian +4 more
wiley +1 more source
The Astronomical JournalThe solar dynamo is essentially a cyclic process in which the toroidal component of the magnetic field is converted into the poloidal one and vice versa.
Aparup Ghosh +3 more
doaj +1 more source