Mathematics
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...7916784n&link_type=abstract
Presented at Conf. on Origins of Planetary Magnetism, Houston, Tex., 8-11 Nov. 1978
Mathematics
Mariner 10 Space Probe, Mercury (Planet), Planetary Magnetic Fields, Planetary Magnetospheres, Data Reduction, Dipole Moments, Magnetopause, Mathematical Models, Solar Wind, Spherical Harmonics
Scientific paper
Data from Mariner 10 observations of Mercury indicate that there exists an intrinsic magnetic field of the planet, sufficiently strong at present to deflect the solar wind flow around the planet and to form a detached bow shock wave in the super Alfvenic solar wind. Four methods used to analyze the magnetic field data and derive quantitative values for the description of the planetary field include (1) comparison of bow shock and magnetopause relative positions at Mercury to those at Earth; (2) direct spherical harmonic analysis of the data; (3) modeling of the magnetosphere by an image dipole and infinite 2-D current sheet in addition to the planetary field; and (4) scaling of a mathematical model for the terrestrial magnetosphere. The results obtained yield dipole moments ranging from 2.4 to 5.1x10 to the 22d power, with the lower values associated cw cm with certain models using partial quadrupole and octupole terms to improve the least squares fitting of models to observations.
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