Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2469..265l&link_type=abstract
In NASA. Marshall Space Flight Center Double Layers in Astrophysics p 265-273 (SEE N87-23313 16-88)
Astronomy and Astrophysics
Astrophysics
Auroras, Earth Magnetosphere, Electric Fields, Plasma Layers, Space Plasmas, Charged Particles, Current Density, Electron Acceleration, Magnetohydrodynamic Flow
Scientific paper
Double layers form along auroral field lines in the Earth's magnetosphere. They form in order to maintain current continuity in the ionosphere in the presence of a magnetospheric electric field E with nabla x E is not equal to 0. Features which govern the formation of the double layers are: (1) the divergence of E, (2) the conductivity of the ionosphere, and (3) the current-voltage characteristics of auroral magnetic field lines. Astrophysical situations where nabla x E is not equal to 0 is applied to a conducting plasma similar to the Earth's ionosphere are potential candidates for the formation of double layers. The region with nabla x E is not equal to 0 can be generated within, or along field lines connected to, the conducting plasma. In addition to nabla x E, shear neutral flow in the conducting plasma can also form double layers.
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