Auroral Signature of Bow Shock Diffuse Ions

Details Auroral Signature of Bow Shock Diffuse Ions Auroral Signature of Bow Shock Diffuse Ions

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm22b05c&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM22B-05

Physics

2704 Auroral Phenomena (2407), 2716 Energetic Particles, Precipitating, 2724 Magnetopause, Cusp, And Boundary Layers, 2736 Magnetosphere/Ionosphere Interactions, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

FUV Spectrographic Imager on board IMAGE spacecraft has the capability of detecting Doppler-shifted Lyman-α emissions so that in principle it can indirectly monitor the energetic ion precipitations into the ionosphere. Concurrent measurements of magnetic fields in the solar wind, energetic ions at the quasi-parallel bow shock and proton auroral images are examined to reveal the relation between the bow shock energetic ion fluxes and photon intensity at the poleward region of the dayside auroral zone around the magnetic local noon. The upstream diffuse ions possess a significant portion of the total plasma energy density. We will show that considerable energy fluxes are transported from the bow shock into the ionosphere through the polar cusp region to produce the auroral luminosity in the proton auroral images. This transport is subjected to the IMF control.

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