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The relation between stellar rotation rate and activity cycle periods
- R. Noyes, N. Weiss, A. Vaughan
- Physics
- 1 December 1984
The empirical relation between rotation period, spectral type, and activity cycle period is investigated for a sample of 13 slowly rotating lower main-sequence stars, including the Sun, all of which…
An Active Sun Throughout the Maunder Minimum
Measurements of 10Be concentration in the Dye 3 ice core show that magnetic cycles persisted throughout the Maunder Minimum, although the Sun's overall activity was drastically reduced and sunspots…
Convection in the earth's mantle: towards a numerical simulation
- D. McKenzie, J. Roberts, N. Weiss
- Geology, PhysicsJournal of Fluid Mechanics
- 11 February 1974
Plate tectonics provides a remarkably accurate kinematic description of the motion of the earth's crust but a fully dynamical theory requires an understanding of convection in the mantle. Thus the…
The expulsion of magnetic flux by eddies
- N. Weiss
- PhysicsProceedings of the Royal Society of London…
- 1 August 1966
A convective eddy imposed on an initially uniform magnetic field in a highly conducting fluid distorts the lines of force and amplifies the field. Flux is concentrated outside the eddy; within it,…
Nonlinear penetrative convection
Convection in water above ice penetrates into the stably stratified region above the density maximum at 4 °C. Two-dimensional penetrative convection in a Boussinesq fluid confined between free…
On the Interaction between Convection and Magnetic Fields
- F. Cattaneo, T. Emonet, N. Weiss
- Physics
- 10 May 2003
Turbulent convection in the solar photosphere can act as a small-scale dynamo, maintaining a disordered magnetic field that is locally intense. On the other hand, convection is inhibited in the…
Two-dimensional Rayleigh-Benard convection
Two-dimensional convection in a Boussinesq fluid confined between free boundaries is studied in a series of numerical experiments. Earlier calculations by Fromm and Veronis were limited to a maximum…
Sunspots and Starspots
- J. H. Thomas, N. Weiss
- Physics
- 1 October 2008
Preface 1. The sun among the stars 2. Sunspots and starspots: a historical introduction 3. Overall structure of a sunspot 4. Fine structure of the umbra 5. Fine structure of the penumbra 6.…
Dissipative heating in convective flows
- J. Hewitt, D. McKenzie, N. Weiss
- PhysicsJournal of Fluid Mechanics
- 29 April 1975
Dissipative heating is produced by irreversible processes, such as viscous or ohmic heating, in a convecting fluid; its importance depends on the ratio d/HT of the depth of the convecting region to…
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