Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm12a0839h&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM12A-0839
Physics
2753 Numerical Modeling, 2784 Solar Wind/Magnetosphere Interactions, 5443 Magnetospheres (2756), 6250 Moon (1221)
Scientific paper
Deflection of the solar wind by Lunar magnetic anomalies was first detected by the Apollo missions and most recently with the measurement of mini-magnetospheres forming around the large crustal magnetizations by Lunar Prospector. Mini-magnetospheres may also form around the Martian magnetic anomalies and some of the Jovian moons. Not only do mini-magnetospheres provide insight into magnetospheric physics, they provide naturally occurring radiation shielding, which in turn could influence the surface properties. 3D multi-fluid MHD simulations of the solar wind interacting with a single magnetic dipole embedded in the surface of the Moon show that a mini-magnetosphere forms with a shock surface over 100 km above the Lunar surface, with a lateral scale size greater than 500 km. The mini-magnetospheres have a large variability with changes in the {B}{y} and {B}{z} components of the IMF but look qualitatively similar to the mini-magnetospheres that formed in 2D simulations for similar conditions. When the total magnetic field is held roughly constant but the number of dipoles is increased, the mini-magnetosphere inflates. This is due to the larger scale size of the magnetized region and inhibited fluid flow as a result of a more complex magnetic field geometry.
Harnett Erika M.
Sutters E.
Winglee Robert M.
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