Results 41 to 50 of about 22,479 (200)

Non-linear dynamo waves in an incompressible medium when the turbulence dissipative coefficients depend on temperature [PDF]

Annales Geophysicae, 1997
Non-linear α-ω; dynamo waves existing in an incompressible medium with the turbulence dissipative coefficients depending on temperature are studied in this paper.
A. D. Pataraya, T. A. Pataraya
doaj   +1 more source

Coronal influence on dynamos [PDF]

, 2013
We report on turbulent dynamo simulations in a spherical wedge with an outer coronal layer. We apply a two-layer model where the lower layer represents the convection zone and the upper layer the solar corona.
Brandenburg, Axel, Warnecke, Jörn
core   +1 more source

The Solar Dynamo [PDF]

International Astronomical Union Colloquium, 1990
AbstractThe phenomena of solar activity are connected with a general magnetic field of-the Sun which is due to a dynamo process essentially determined by the α-effect and the differential rotation in the convection zone. A few observational facts are summarized which are important for modelling this process.
openaire   +1 more source

Magneto-Rossby Waves and Seismology of Solar Interior

Frontiers in Astronomy and Space Sciences, 2018
Eleven-year Schwabe cycle in solar activity is not yet fully understood despite of its almost two century discovery. It is generally interpreted as owing to some sort of magnetic dynamo operating below or inside the convection zone.
Teimuraz V. Zaqarashvili, Teimuraz V. Zaqarashvili, Teimuraz V. Zaqarashvili, Eka Gurgenashvili   +3 more
doaj   +1 more source

Magnetic Helicity Evolution During the Solar Activity Cycle: Observations and Dynamo Theory

, 2003
We study a simple model for the solar dynamo in the framework of the Parker migratory dynamo, with a nonlinear dynamo saturation mechanism based on magnetic helicity conservation arguments.
Abramenko, Abramenko, Baliunas, Bao, Berger, Blackman, Blackman, Brandenburg, Brandenburg, Brandenburg, Brooke, Bruevich, Chae, Covas, D. Moss, D. Sokoloff, Dikpati, Field, Frisch, Galitski, H. Zhang, Hoyt, I. Rogachevskii, Iroshnikov, K. Kuzanyan, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kleeorin, Kuzanyan, Longcope, N. Kleeorin, Parker, Pevtsov, Pevtsov, Pevtsov, Rogachevskii, Rogachevskii, Rust, Rüdiger, Seehafer, Sofia, Sokoloff, Spruit, Subramanian, Tavakol, Wang, Woltjer, Zhang, Zhang, Zhang, Zhang, Zhang   +55 more
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Prediction of Sunspot Cycles by Data Assimilation Method [PDF]

, 2008
Despite the known general properties of the solar cycles, a reliable forecast of the 11-year sunspot number variations is still a problem. The difficulties are caused by the apparent chaotic behavior of the sunspot numbers from cycle to cycle and by the ...
Kitiashvili, I. N., Kosovichev, A. G.
core   +2 more sources

Helicity conservation in nonlinear mean-field solar dynamo

, 2012
We explore the impact of magnetic helicity conservation on the mean-field solar dynamo using the axisymmetric dynamo model which includes the subsurface shear.
Kuzanyan, K. M., Pipin, V. V., Sokoloff, D. D., Zhang, H.   +3 more
core   +1 more source

Persistent Magnetic Wreaths in a Rapidly Rotating Sun [PDF]

, 2010
When our Sun was young it rotated much more rapidly than now. Observations of young, rapidly rotating stars indicate that many possess substantial magnetic activity and strong axisymmetric magnetic fields.
Allan Sacha Brun, Baliunas, Ballot, Barnes, Benjamin P. Brown, Bouvier, Brandenburg, Brown, Browning, Browning, Brun, Brun, Charbonneau, Cline, Clyne, Delfosse, Dikpati, Howe, Juri Toomre, Knobloch, Käpylä, Mark S. Miesch, Matt, Matthew K. Browning, Miesch, Moffatt, Mohanty, Ossendrijver, Reiners, Reiners, Rempel, Saar, Saar, Saar, Steenbeck, Vasil, Vasil, West, West   +38 more
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Understanding the solar dynamo [PDF]

Astronomy and Geophysics, 2004
olar magnetic activity is observed on a wide range of scales, from the intriguingly regular and well-ordered large-scale field, to much more complex small-scale structures. In this article we shall primarily be concerned with the large-scale features, and the associated large-scale dynamo that is responsible for their occurrence.
Bushby P, Mason J
openaire   +2 more sources

The effect of a meridional flow on Parker's interface dynamo

, 2004
Parker's interface dynamo is generalized to the case when a homogeneous flow is present in the high-diffusivity (upper) layer in the lateral direction (i.e. perpendicular to the shear flow in the lower layer).
A. Kerekes, Basu, Charbonneau, Choudhuri, Dikpati, Dikpati, Hathaway, K. Petrovay, Kosovichev, Makarov, Markiel, Mason, Moss, Parker, Petrovay, Petrovay, Phillips, Tobias, Wang, Weiss   +19 more
core   +2 more sources