The global-scale magnetic field of Mercury

Details The global-scale magnetic field of Mercury The global-scale magnetic field of Mercury

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..151a&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.151

Physics

Scientific paper

Analysis of Mercury's magnetic field from MESSENGER orbital observations shows that despite marked plasma pressures near the equator, magnetic field directions can be used to determine the north-south position of the magnetic equator. Such analysis yields a northward displacement of the planetary dipole of 0.193 ± 0.006 RM and a maximum tilt of 2.5°. This northward displacement implies a substantial north-south asymmetry in the surface field intensity and presents a challenge for planetary dynamo models to produce a large-scale dipolar field offset from the planetary equator. One possibility is that this asymmetry may reflect the influence of large-scale lateral variations in heat flow at the coremantle boundary.

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