Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.7796c&link_type=abstract
Journal of Geophysical Research, vol. 86, Sept. 1, 1981, p. 7796, 7797; Reply, p. 7798.
Astronomy and Astrophysics
Astronomy
9
Astronomical Models, Current Sheets, Jupiter (Planet), Planetary Magnetic Fields, Polar Regions, Astronomical Coordinates, Pioneer 10 Space Probe, Planetary Magnetospheres, Jupiter, Magnetic Fields, Magnetosphere, Azimuth, Currents, Asymmetry, Diagrams, Comparisons, Pioneer 10, Pioneer 11, Polar Regions, Models
Scientific paper
In the first paper, an alternative to one of the models of current flow giving rise to the azimuthal component of the Jupiter magnetic field considered by Parish et al. (1980) is proposed which takes into account the magnetic fields due to return currents and is consistent with Pioneer 10 observations. In the present model, currents enter the equatorial sheet at both poles and then flow radially outward, with a total current flowing into the polar regions of about 1.4 x 10 to the 8th A. In the reply, it is contended that, although the return currents must be present, their net effects almost exactly cancel and their contributions to the near-equatorial field may be neglected for regions sufficiently far from the field lines on which the return current flows. Furthermore, the difference in the total currents estimated by Parish et al. and in the first paper is attributed to the uncertainties and inadequacy of the fit of either model to the observations and to a difference in mathematic expressions used for the field rather than a significant difference between models.
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