Other
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusm.p33a..01p&link_type=abstract
American Geophysical Union, Spring Meeting 2004, abstract #P33A-01
Other
1517 Magnetic Anomaly Modeling, 1545 Spatial Variations (All Harmonics And Anomalies), 5440 Magnetic Fields And Magnetism
Scientific paper
There are an infinity of magnetization distributions that produce no external magnetic field, a result demonstrated by Runcorn to bring attention to the non-uniqueness inherent in the interpretation of lunar magnetic field observations. These distributions have been given the name annihilators. Runcorn's example, that of a uniformly magnetized spherical shell, is not a reasonable explanation for the Mars that we think we know. But other, more reasonable, annihilators have been proposed for the Earth. But those are not appropriate for the Martian case because of the absence of a dominant present day core field. We concentrate in this talk on two questions: 1) How do we ensure uniqueness in our inversions?, and 2) what alternative, but still reasonable, magnetization distributions might explain the Martian magnetic field observations?
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