Physics
Scientific paper
Mar 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976georl...3..125r&link_type=abstract
Geophysical Research Letters, vol. 3, Mar. 1976, p. 125-128.
Physics
8
Magnetic Moments, Planetary Magnetic Fields, Venus (Planet), Dipole Moments, Interplanetary Magnetic Fields, Magnetic Dipoles, Magnetosheath, Planetary Magnetospheres, Solar Wind, Venera 4 Satellite, Vertical Distribution
Scientific paper
Venera-4 magnetic-field measurements made during that spacecraft's descent through the atmosphere of Venus are reexamined using three models for the interaction of the solar-wind with the planet. The first model assumes the existence of just the interplanetary and planetary magnetic fields; the second admits the presence of a magnetosheath and a current layer, but assumes that the magnetosheath field is spatially uniform between the planet and the bow shock; the third assumes shielding of the planetary field from the magnetosheath field by a current layer. All three models are found to yield a strong altitude dependence for the magnitude of the planetary field, suggesting that the intrinsic magnetic dipole moment of Venus may exceed that of both Mars and Mercury. It is concluded that a Venusian surface field of 30 gammas is a plausible interpretation of the Venera-4 measurements.-
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