Polar PWI and CEPPAD observations of chorus emissions and radiation belt electron acceleration: Four case studies

0318719 - ÚFA 2009 RIV GB eng J - Journal Article
Sigsbee, K. - Menietti, J. D. - Santolík, Ondřej - Blake, J. B.
Polar PWI and CEPPAD observations of chorus emissions and radiation belt electron acceleration: Four case studies.
[Pozorování emisí typu chorus a urychlování elektronů v radiačním pásu: čtyři případové studie s využitím pozorování Polar PWI a CEPPAD.]
Journal of Atmospheric and Solar-Terrestrial Physics. Roč. 70, č. 14 (2008), s. 1774-1788. ISSN 1364-6826. E-ISSN 1879-1824
R&D Projects: GA AV ČR IAA301120601
Grant - others:NASA(US) NNG05GM52G; NSF(US) 0307319
Institutional research plan: CEZ:AV0Z30420517
Keywords : chorus * outer radiation belt
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 1.667, year: 2008

We investigated the role of whistler-mode chorus in accelerating outer radiation belt electrons during four moderate geomagnetic storms when data from the Polar Plasma Wave Investigation (PWI) were available. The storm time periods we examined included two storms associated with coronal mass ejections (CMEs), the well-studied January 10–13, 1997 International Solar Terrestrial Physics event and the May 12–15, 1997 event. We compared these two storms with two geomagnetically active periods that were not associated with CMEs. Although strong chorus emissions were observed during all four events, the association of electron acceleration with chorus emissions is not clear. During all four events, the Polar Comprehensive Energetic Particle and Pitch Angle Distribution (CEPPAD) experiment observed increases in the fluxes of energetic electrons (0.8 < E < 6.4MeV). The two events associated with CMEs featured a sudden increase in the electron fluxes above 0.8MeV (probable the impact of the CME shock wave).

Byla prozkoumána role emisí typu chorus pro urychlování elektronů ve vnějším radiačním pásu.
Permanent Link: http://hdl.handle.net/11104/0168052