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Small-scale dynamos: From idealized models to solar and stellar applications
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Small-scale dynamos: From idealized models to solar and stellar applications
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In this article we review small-scale dynamo processes that are responsible for magnetic field generation on scales comparable to and smaller than the energy carrying scales of turbulence. We provide a review of critical observation of quiet Sun magnetism, which have provided strong support for the operation of a small-scale dynamo in the solar photosphere and convection zone. After a review of basic concepts we focus on numerical studies of kinematic growth and non-linear saturation in idealized setups, with special emphasis on the role of the magnetic Prandtl number for dynamo onset and saturation. Moving towards astrophysical applications we review convective dynamo setups that focus on the deep convection zone and the photospheres of solar-like stars. We review the critical ingredients for stellar convection setups and discuss their application to the Sun and solar-like stars including comparison against available observations.
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Cited by 1 Pith paper
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Solar Cycle Variation of the Distribution of Photospheric Magnetic Flux Features
A smooth double power law, not a single power law, best fits the photospheric flux distribution over the full solar cycle; its large-scale slope varies with activity while the small-scale slope is stable.
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