Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm13e..04z&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM13E-04
Physics
0310 Airglow And Aurora, 2407 Auroral Ionosphere (2704), 2471 Plasma Waves And Instabilities (2772), 2716 Energetic Particles: Precipitating, 2778 Ring Current
Scientific paper
Ring current auroras (RCA) refer to the auroral emissions due to precipitating particles from the ring current. RCA are typically observed at sub-auroral latitudes due to precipitating protons or energetic neutral atomic hydrogen via charge-exchange. The electromagnetic ion cyclotron wave - particle interaction is the dominant mechanism for the precipitating protons. Change in the ambient magnetic field along the proton drift path could also cause the proton to precipitate. Different features of RCA will be shown by examples. A limited ring current simulation indicates that the structures in RCA are controlled by the proton pitch angle distribution. Observations of RCA not only reveal ring current dynamics but also serve as a tool to validate ring current models.
Paxton Larry J.
Zhang Yajing
Zheng Yuanlin
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