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Hydromagnetic constraints on deep zonal flows in the giant planets

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Randolph L. Kirk, and David J. Stevenson, 1987, Hydromagnetic constraints on deep zonal flows in the giant planets: Astrophysical Journal, v. 316, iss. 2.

Summary

The observed zonal flows of the giant planets will, if they penetrate below the visible atmosphere, interact significantly with the planetary magnetic field outside the metallized core. The appropriate measure of this interaction is the Chandrasekhar number Q = H^2 /4πρνα^2 λ (H = radial component of the magnetic field, ν = eddy viscosity, λ = magnetic diffusivity, α^-1 = length scale on which λ varies); at depths where Q ≳ 1, the velocity will be forced to oscillate on a small length scale or decay to zero. We estimate the conductivity due to semiconduction in H_2 (Jupiter, Saturn) and ionization in H_(2)0 (Uranus, Neptune) as a function of depth; the value λ ≈ 10^10 cm^2 s^-1 needed for Q = 1 is readily obtained well outside the [...]

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Type Scheme Key
local-index unknown 70201403
local-pk unknown 70201403
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1086/165248
series unknown Astrophysical Journal

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journalAstrophysical Journal
parts
typevolume
value316
typeissue
value2
languageEnglish
citationTypeArticle

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