Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..76...35w&link_type=abstract
Astrophysics and Space Science, vol. 76, no. 1, May 1981, p. 35-47.
Astronomy and Astrophysics
Astrophysics
4
Atmospheric Models, Earth Magnetosphere, Magnetic Field Configurations, Ring Currents, Solar Terrestrial Interactions, Space Plasmas, Atmospheric Electricity, Equatorial Atmosphere, Field Aligned Currents, Geomagnetism, Lines Of Force, Self Consistent Fields, Solar Wind
Scientific paper
The magnetosphere is modeled by superimposing a dipole field, a uniform field and a perturbation field due to a simple current system. This current system comprises a ring current in the neutral line of the dipole plus uniform fields, together with vertical currents representing field-aligned currents to the neutral line. The current circuit is closed through two additional ring currents above and below the equatorial plane representing distributed adiabatic perpendicular currents. This system produces many magnetospheric features, among them a magnetopause, bending of magnetic field lines in the anti-solar direction, a magnetotail, and cusps in the day-side of the earth. The objective is to demonstrate that it is not necessary to think of the magnetic field topology as being caused by the flowing plasma carrying field lines. The primary physical problem is to derive the current system from the self-consistent interaction of the solar-wind and magnetospheric plasmas and fields.
Alfvén Hannes
McIlwain Carl E.
Whipple Elden C. Jr.
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