Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p41a..06a&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #P41A-06
Physics
2154 Planetary Bow Shocks, 2423 Ionization Mechanisms, 2780 Solar Wind Interactions With Unmagnetized Bodies, 5440 Magnetic Fields And Magnetism, 5443 Magnetospheres (2756)
Scientific paper
The discovery of remnant magnetization in the Martian crust by the MGS MAG/ER Experiment has been one of the most significant results obtained by the Mars Global Surveyor Mission. The lack of an active planetary dynamo coupled to the peculiar correlation of crustal magnetic sources with the age of the terrain, provide a unique window into the thermal history of the planet and the evolution of the crust and possibly the atmosphere. The MAG/ER results also point to the dramatic role that giant impacts may have played in modifying the crustal magnetization of planetary objects in the early Solar System. The strong crustal fields produce a complex Mars-Solar Wind interaction over regions where multiple "cusps" may exist and electron impact ionization plays a significant role in the creation and removal of oxygen ions of atmospheric origin. Crustal magnetization is concentrated in the southern hemisphere leading to a significant hemispherical asymmetry in the obstacle presented to the Solar Wind.
Acuña Mario Humberto
Cloutier P.
Connerney J. E.
Lin Robert P.
Mazelle Christian
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