Results 131 to 140 of about 41,413 (274)

SIMULATION STUDY OF HEMISPHERIC PHASE-ASYMMETRY IN THE SOLAR CYCLE [PDF]

, 2017
Observations of the Sun suggest that solar activities systematically create north–south hemispheric asymmetries. For instance, the hemisphere in which sunspot activity is more active tends to switch after the early half of each solar cycle.
Kusano, K., Shukuya, D.
core   +1 more source

Nonlinear astrophysical dynamos - Bifurcation of steady dynamos from oscillating dynamos

The Astrophysical Journal, 1978
The nonlinear dynamo wave equation, which has been formulated to explore oscillating dynamos, is found also to have steady magnetic field condfigurations as its stable solutions. The solutions of the nonlinear wave equation, integrated numerically as the initial-boundary-value problem in the rotating spherical geometry, eventually bifurcate into a ...
openaire   +1 more source

The Magnetic Helicity Driven Solar-Type Dynamo

Universe
(1) Theoretical studies have shown that large-scale vorticity generates a divergent-type helicity flux associated with small-scale magnetic fluctuations.
Valery V. Pipin
doaj   +1 more source

Evaluating solar-like behavior in turbulent alpha and Babcock–Leighton mechanisms using non-kinematic nonlinear flux-transport solar dynamos

Scientific Reports
In this study, we simulate 30,000 years of solar activity using turbulent-alpha (TA) and Babcock–Leighton (BL) mechanisms in a non-kinematic, nonlinear mean field flux-transport solar dynamo model.
Fadil Inceoglu, Rainer Arlt
doaj   +1 more source

Magnetic material in mean-field dynamos driven by small scale helical flows

New Journal of Physics, 2014
We perform kinematic simulations of dynamo action driven by a helical small scale flow of a conducting fluid in order to deduce mean-field properties of the combined induction action of small scale eddies.
A Giesecke, F Stefani, G Gerbeth
doaj   +1 more source

Computer Simulation of a Magnetohydrodynamic Dynamo II

, 1994
"We performed a computer simulation of a magnetohydrodynamic dynamo in a rapidly rotating spherical shell. Extensive parameter runs are carried out changing the electrical resistivity.
"Kageyama, A., Sato, T., The, Complexity Simulation Group"   +2 more
core  

Poster Sessions

HemaSphere, Volume 10, Issue S1, June 2026.
wiley   +1 more source

Nonlinearity in Turbulent Diffusion as a Possible Cause of Stellar Flares

Astronomy
Extremely powerful flares releasing energy well above 1032 erg are rare compared to the typical manifestations of solar activity, which are already being routinely monitored by the existing Space Weather network—with some level of predictability. However,
Elena Popova
doaj   +1 more source

A lunar core dynamo limited to the Moon’s first ~140 million years

Communications Earth & Environment
Single crystal paleointensity (SCP) reveals that the Moon lacked a long-lived core dynamo, though mysteries remain. An episodic dynamo, seemingly recorded by some Apollo basalts, is temporally and energetically problematic.
Tinghong Zhou, John A. Tarduno, Rory D. Cottrell, Clive R. Neal, Francis Nimmo, Eric G. Blackman, Mauricio Ibañez-Mejia   +6 more
doaj   +1 more source

Magnetic Field Amplification and Reconstruction in Rotating Astrophysical Plasmas: Verifying the Roles of α and β in Dynamo Action

Particles
We investigate the α and β effects in a rotating spherical plasma system relevant to astrophysical contexts. In particular, we focus on how kinetic and magnetic (current) helicities influence the magnetic diffusivity β.
Kiwan Park
doaj   +1 more source