Relativistic electron precipitations in association with diffuse aurora: Conjugate observation of SAMPEX and the all sky TV camera at Syowa Station

TitleRelativistic electron precipitations in association with diffuse aurora: Conjugate observation of SAMPEX and the all sky TV camera at Syowa Station
Publication TypeJournal Article
Year of Publication2015
AuthorsKurita, S, Kadokura, A, Miyoshi, Y, Morioka, A, Sato, Y, Misawa, H
JournalGeophysical Research Letters
Date Published06/2015
Keywordsdiffuse aurora; Radiation belts; SAMPEX; Syowa Station; whistler mode wave
AbstractIt has been believed that whistler mode waves can cause relativistic electron precipitations. It has been also pointed out that pitch angle scattering of ~keV electrons by whistler mode waves results in diffuse auroras. Thus, it is natural to expect relativistic electron precipitations associated with diffuse auroras. Based on a conjugate observation between the SAMPEX spacecraft and the all-sky TV camera at Syowa Station, we report, for the first time, a case in which relativistic electron precipitations are associated with diffuse aurora. The SAMPEX observation shows that the precipitations of >1 MeV electrons are well accompanied with those of >150 and >400 keV electrons. This indicates that electrons in the energy range from several keV to >1 MeV precipitate into the atmosphere simultaneously. Our result supports the idea that whistler mode waves contribute to both generation of diffuse auroras and relativistic electron precipitations.
URLhttp://doi.wiley.com/10.1002/2015GL064564
DOI10.1002/2015GL064564
Short TitleGeophys. Res. Lett.


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