Physics
Scientific paper
Nov 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3422106b&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 22, CiteID L22106
Physics
7
Interplanetary Physics: Pickup Ions, Planetary Sciences: Solar System Objects: Mercury, Interplanetary Physics: Plasma Waves And Turbulence, Magnetospheric Physics (6939), Atmospheric Composition And Structure: Exosphere
Scientific paper
Magnetometer data was examined from the two Mariner 10 passages through Mercury's magnetosphere for evidence of Na+ electromagnetic ion cyclotron waves (ICW). These waves are expected to be produced if the thermalization of newly created Na+ pick-up ions occurs. We found no evidence of Na+ ICW. The spacecraft's rapid passage through Mercury's magnetosphere meant that the ambient magnetic field was only relatively constant for at most ~3-4 Na+ ICW wave periods throughout each transversal, therefore limiting the spectral resolution of the Na+ cyclotron frequency. Our computations indicate that the wavelengths of Na+ ICW may be on the order of the system scale lengths. It is, therefore, questionable whether these waves can grow to sufficient amplitude to effectively thermalize these pick-up ions and incorporate them into Mercury's magnetosphere.
Boardsen Scott A.
Slavin James Arthur
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