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Proton aurora observed from the ground
Auroral keV proton precipitation is a significant-energy particle input upon the high-latitude ionosphere, often dominating in the polar cusp and the dusk sector of the equatorward auroral oval. A unique signature of proton precipitation is the Doppler-shifted H Balmer lines (Hα, Hβ) observable from the ground. These lines are emitted by energetic H atoms produced within the proton beam through charge-exchange processes. Their observations allow one to assess the location, dynamic evolution especially during magnetospheric ...
Galand, Marina; Chakrabarti, Supriya;
Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on:
YEAR: 2006   DOI: https://doi.org/10.1016/j.jastp.2005.04.013