Examination of MARINER-10 Magnetic Field Data for Heavy Ion Signatures During the Mercury I and III Encounters by Mariner-10

Details Examination of MARINER-10 Magnetic Field Data for Heavy Ion Signatures During the Mercury I and III Encounters by Mariner-10 Examination of MARINER-10 Magnetic Field Data for Heavy Ion Signatures During the Mercury I and III Encounters by Mariner-10

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm23a0309b&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM23A-0309

Physics

2700 Magnetospheric Physics (6939), 2772 Plasma Waves And Instabilities (2471), 6235 Mercury, 7859 Transport Processes, 7867 Wave/Particle Interactions (2483, 6984)

Scientific paper

From the Mariner-10 flybs of Mercury in the mid 1970s it was discovered that Mercury had a small intrinsic magnetic field and as a result a small magnetosphere with a standoff distance of ~1.5 Mercury Radii. In the mid 1980s it was discovered telescopically that Mercury has a strong but highly variable heavy ion exosphere of Na, K and Ca, with Na being the dominant species of the heavy ions. Some of these heavy ions are ionized through photo-ionization, directly from ion sputtering, and through charge exchange with solar wind and magnetosphere protons and He+. The questions arises to what extent can these ions be retained by Mercury's small magnetosphere and can they play a role in the plasma physics of this system? What wave-particle interactions are necessary for their thermalization? How cold do the heavy ions have to be in order to be retained in Mercury's magnetosphere? To investigate these questions we will examine the Mariner 10 magnetic field data for heavy ion signatures or lack of during its two brief encounters with Mercury's magnetosheath/magnetosphere.

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