Physics – Plasma Physics
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3713101f&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 13, CiteID L13101
Physics
Plasma Physics
10
Space Plasma Physics: Neutral Particles (2151), Magnetospheric Physics: Magnetosheath, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Interplanetary Physics: Solar Wind Plasma
Scientific paper
The shocked solar wind in the Earth's magnetosheath becomes nearly stationary at the subsolar magnetopause. At this location, solar wind protons are neutralized by charge exchange with neutral hydrogen atoms at the extreme limits of the Earth's tenuous exosphere. The resulting Energetic Neutral Atoms (ENAs) propagate away from the subsolar region in nearly all directions. Simultaneous observations of hydrogen ENAs from the Interstellar Boundary Explorer (IBEX) and proton distributions in the magnetosheath from the Cluster spacecraft are used to quantify this charge exchange process. By combining these observations with a relatively simple model, estimates are obtained for the ratio of ENA to shocked solar wind flux (about 10-4) and the exospheric density at distances greater than 10 Earth Radii (RE) upstream from the Earth (about 8 cm-3).
Funsten Herbert O.
Fuselier Stephen A.
Heirtzler D.
Janzen Paul
Kucharek Harald
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