Other
Scientific paper
Feb 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ssrv..122...89j&link_type=abstract
Space Science Reviews, Volume 122, Issue 1-4, pp. 89-95
Other
6
Auroral Acceleration, AlfvÉ, N Waves, Landau Resonance, Alfvén Waves
Scientific paper
Auroral emission caused by electron precipitation (Hardy et al., 1987, J. Geophys. Res. 92, 12275-12294) is powered by magnetospheric driving processes. It is not yet fully understood how the energy transfer mechanisms are responsible for the electron precipitation. It has been proposed (Hasegawa, 1976, J. Geophys. Res. 81, 5083-5090) that Alfvén waves coming from the magnetosphere play some role in powering the aurora (Wygant et al., 2000, J. Geophys. Res. 105, 18675-18692, Keiling et al., 2003, Science 299, 383-386). Alfvén-wave-induced electron acceleration is shown to be confined in a rather narrow radial distance range of 4-5 R E (Earth radii) and its importance, relative to other electron acceleration mechanisms, depends strongly on the magnetic disturbance level so that it represents 10% of all electron precipitation power during quiet conditions and increased to 40% during disturbed conditions. Our observations suggest that an electron Landau resonance mechanism operating in the “Alfvén resonosphere” is responsible for the energy transfer.
Janhunen Pekka
Laakso Harri
Olsson Annika
Russell Christopher T.
No associations
LandOfFree
Alfvénic Electron Acceleration in Aurora Occurs in Global Alfvén Resonosphere Region does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Alfvénic Electron Acceleration in Aurora Occurs in Global Alfvén Resonosphere Region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alfvénic Electron Acceleration in Aurora Occurs in Global Alfvén Resonosphere Region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1165525