Other
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p41c1621z&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P41C-1621
Other
[6250] Planetary Sciences: Solar System Objects / Moon, [6025] Planetary Sciences: Comets And Small Bodies / Interactions With Solar Wind Plasma And Fields
Scientific paper
Since June 27, 2011, one of the two ARTEMIS spacecraft, P1, has been trapped in a near-moon orbit, crossing the wake of the Moon every day or two at a downstream distance of about 6 RL (lunar radius = 1737 km). The other ARTEMIS spacecraft, P2, orbited in the solar wind near the Moon, where it monitored solar wind conditions. We have studied the structure of the wake observed by P1 and analyzed its dependence on the solar wind and interplanetary magnetic field conditions observed by P2. We found that there is an expansion region around the void region where the plasma is almost absent. The outer boundary of this region expands away from the void region at the speed of the fast mode, whereas the inner boundary propagates into the void region at a speed closer to that of the slow mode. There are sharp changes in plasma density, temperature and field magnitude inside the expansion region, probably indicating that these expansion fans are shock structures.
Angelopoulos Vassilis
Galland Kivelson Margaret
Khurana Krishan K.
Pu Zhang
Walker Ray J.
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