Ion outflow observed by IMAGE: Implications for source regions and heating mechanisms

Details Ion outflow observed by IMAGE: Implications for source regions and heating mechanisms Ion outflow observed by IMAGE: Implications for source regions and heating mechanisms

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.1163f&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 6, p. 1163-1166

Physics

28

Ionosphere: Ionosphere/Magnetosphere Interactions, Ionosphere: Particle Precipitation, Magnetospheric Physics: Auroral Phenomena

Scientific paper

Images of the Earth's proton aurora from the IMAGE spacecraft on 8 June 2000 indicate a temporally and spatially isolated ionospheric response to a shock that impinged on the Earth's magnetopause. Sometime after this ionospheric response, the Low Energy Neutral Atom imager on IMAGE detected enhanced ionospheric outflow. The time delay between the ionospheric response and the enhanced outflow is consistent with the travel time of ~30 eV neutral Oxygen (created by charge exchange of outflowing O+ with the exosphere) from the low altitude ionosphere to the spacecraft. The prompt ionospheric outflow implies that the shock deposited sufficient energy in the topside ionosphere near or above the O+ exobase to initiate the outflow.

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