Results 171 to 180 of about 22,416 (198)
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1994
I discuss the current status of mean field dynamo theory as it is applied to the solar cycle. The restrictions of the theory are pointed out, in particular the First Order Smoothing Approximation and the large fluctuations in the magnetic field superposed on the mean field; potential ways out are indicated.
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I discuss the current status of mean field dynamo theory as it is applied to the solar cycle. The restrictions of the theory are pointed out, in particular the First Order Smoothing Approximation and the large fluctuations in the magnetic field superposed on the mean field; potential ways out are indicated.
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SCIENCE , 2013
Numerical simulations are changing our views on the dynamo process underlying the solar magnetic activity cycle.
Charbonneau, Paul +4 more
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Numerical simulations are changing our views on the dynamo process underlying the solar magnetic activity cycle.
Charbonneau, Paul +4 more
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Space Science Reviews, 2009
Large-scale solar dynamo models were first built by Parker (1955). Over the past half a century these models have evolved significantly. We discuss here the development of a class of large-scale dynamo models which include, along with the α-effect and Ω-effect, an important third process, flux transport by meridional circulation.
Mausumi Dikpati, Peter A. Gilman
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Large-scale solar dynamo models were first built by Parker (1955). Over the past half a century these models have evolved significantly. We discuss here the development of a class of large-scale dynamo models which include, along with the α-effect and Ω-effect, an important third process, flux transport by meridional circulation.
Mausumi Dikpati, Peter A. Gilman
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The solar dynamo wave in Parker's migratory dynamo
Astronomical & Astrophysical Transactions, 1999Abstract A kinematic αω-dynamo model of magnetic field generation in a thin convection shell with a non-uniform but sign-constant helicity profile for large dynamo numbers is considered in the framework of Parker's migratory dynamo. We obtained an asymptotic solution of equations governing the magnetic field with the form of an anharmonic travelling ...
K. M. Kuzanyan, D. Sokoloff
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1998
The solar dynamo is the process by which the Sun's magnetic field is generated through the interaction of the field with convection and rotation. In this, it is kin to planetary dynamos and other stellar dynamos. Although the precise mechanism by which the Sun generates its field remains poorly understood in spite of decades of theoretical and ...
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The solar dynamo is the process by which the Sun's magnetic field is generated through the interaction of the field with convection and rotation. In this, it is kin to planetary dynamos and other stellar dynamos. Although the precise mechanism by which the Sun generates its field remains poorly understood in spite of decades of theoretical and ...
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AIP Conference Proceedings, 2004
The Sun, solar and later spectral type stars show cyclical magnetic activity that manifests itself through the presence of spots on their surfaces. The characteristics of this activity show broad variations both in spot periods, which range from a few to more than 20 years, and spot surface coverages, which range from 0.002 for the Sun to more than 0.5
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The Sun, solar and later spectral type stars show cyclical magnetic activity that manifests itself through the presence of spots on their surfaces. The characteristics of this activity show broad variations both in spot periods, which range from a few to more than 20 years, and spot surface coverages, which range from 0.002 for the Sun to more than 0.5
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Advances in Space Research, 2006
Abstract The origin of the solar magnetic field remains a stubborn challenge of astrophysics. At the solar surface the magnetic field assumes a complex, hierarchical structure in space and time. Systematic features such as the solar cycle and the butterfly diagram point to the existence of a deep-rooted large-scale predominantly toroidal magnetic ...
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Abstract The origin of the solar magnetic field remains a stubborn challenge of astrophysics. At the solar surface the magnetic field assumes a complex, hierarchical structure in space and time. Systematic features such as the solar cycle and the butterfly diagram point to the existence of a deep-rooted large-scale predominantly toroidal magnetic ...
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Transactions of the International Astronomical Union, 1988
Traditionally the theory of the solar dynamo has been divided into two parts. The first, more difficult part, is the derivation of equations governing the mean magnetic field; the second, easier, is the solution of this equation, and the interpretation of the result in terms of observed solar magnetism. This report follows the traditional division.
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Traditionally the theory of the solar dynamo has been divided into two parts. The first, more difficult part, is the derivation of equations governing the mean magnetic field; the second, easier, is the solution of this equation, and the interpretation of the result in terms of observed solar magnetism. This report follows the traditional division.
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Observationally Guided Models for the Solar Dynamo and the Role of the Surface Field
Space Science Reviews, 2023Robert H Cameron, Manfred Schuessler
exaly
1997
The solar dynamo problem is reviewed in the light of recent developments in dynamo theory. We distinguish between the generation of magnetic fields on scales smaller than the velocity correlation length-small scale dynamo, and larger than the velocity correlation length-large scale dynamo.
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The solar dynamo problem is reviewed in the light of recent developments in dynamo theory. We distinguish between the generation of magnetic fields on scales smaller than the velocity correlation length-small scale dynamo, and larger than the velocity correlation length-large scale dynamo.
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