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Turbulent Processes and Mean-Field Dynamo
Mean-field dynamo theory has important applications in solar physics and galactic magnetism. We discuss some of the many turbulence effects relevant...
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Evolution of Solar and Stellar Dynamo Theory
In this paper, written as a general historical and technical introduction to the various contributions of the collection “Solar and Stellar Dynamo: A...
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Observationally Guided Models for the Solar Dynamo and the Role of the Surface Field
Theoretical models for the solar dynamo range from simple low-dimensional “toy models” to complex 3D-MHD simulations. Here we mainly discuss...
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Inflows Towards Bipolar Magnetic Active Regions and Their Nonlinear Impact on a Three-Dimensional Babcock–Leighton Solar Dynamo Model
The changing magnetic fields of the Sun are generated and maintained by a solar dynamo, the exact nature of which remains an unsolved fundamental...
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Migrating Dynamo Waves and Consequences for Stellar Current Sheets
We study the relation between stellar dynamo-wave propagation and the structure of the stellar magnetic field. Modeling dynamo waves by the...
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No Evidence for Absence of Solar Dynamo Synchronization
The old question of whether the solar dynamo is synchronized by the tidal forces of the orbiting planets has recently received renewed interest, both...
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Magnetic Helicity with Solar Dynamo
The research on solar dynamo can be said to begin with the discovery of the 11-year cycle from the statistical observation of sunspot activity and to...
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Nonlinear Parametric Resonance in the Simplest Model of a Solar Dynamo
AbstractThe properties of nonlinear parametric resonance are investigated using the example of the low-mode Parker dynamo model. This model is a...
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The emergence and growth of the flux transport dynamo model of the sunspot cycle
The sunspot cycle is the magnetic cycle of the Sun produced by the dynamo process. A central idea of the solar dynamo is that the toroidal and the...
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Statistical Properties of the Galactic Magnetic Field in the Dynamo Model with Fluctuations of the Alpha Effect and Turbulent Diffusion
AbstractMagnetic fields in galaxies are usually originated through the action of a dynamo, which is based on the helicity of turbulent flows (alpha...
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A large-scale magnetic field produced by a solar-like dynamo in binary neutron star mergers
The merger of two neutron stars launches a relativistic jet, which must be driven by a strong large-scale magnetic field. However, the...
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Unappreciated cross-helicity effects in plasma physics: anti-diffusion effects in dynamo and momentum transport
The cross-helicity (velocity–magnetic-field correlation) effects in the magnetic-field induction and momentum transport in the magnetohydrodynamic...
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Numerical evidence for a small-scale dynamo approaching solar magnetic Prandtl numbers
Magnetic fields on small scales are ubiquitous in the Universe. Although they can often be observed in detail, their generation mechanisms are not...
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Small-scale turbulent dynamo in astrophysical environments: nonlinear dynamo and dynamo in a partially ionized plasma
Small-scale turbulent dynamo is responsible for the amplification of magnetic fields on scales smaller than the driving scale of turbulence in...
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Small-Scale Dynamo in Accretion Discs
AbstractSmall-scale magnetic field is suggested as a mechanism for magnetic field self-excitation in accretion discs. Main features of small-scale...
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The Eigenvalue Problem for a Dynamo in a Thick Disk and the Threshold of Magnetic Field Generation
AbstractGeneration of magnetic fields of various space objects is described using the dynamo mechanism associated with the character of motions of a...
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Comment on “Tidally Synchronized Solar Dynamo: A Rebuttal” by Nataf (Solar Phys. 297, 107, 2022)
Nataf ( Solar Phys. 297 , 107,
2022 ) has recently asserted that the hypothesis that the solar dynamo may be synchronized by planetary tidal forces is...