Physics – Plasma Physics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...10323459n&link_type=abstract
Journal of Geophysical Research, Volume 103, Issue A10, p. 23459-23474
Physics
Plasma Physics
70
Ionosphere: Particle Acceleration, Ionosphere: Wave/Particle Interactions, Space Plasma Physics: Wave/Particle Interactions
Scientific paper
More than one mechanism is causing ion energization perpendicular to the geomagnetic field in the auroral region. Observations by the Freja satellite obtained during 20 months at altitudes around 1700 km are used to study the most common O+ energization mechanisms. Ion energization can be due to broadband low-frequency waves, causing resonant energization by interaction at frequencies around the ion gyrofrequency. Energization can also be caused by resonant energization by electromagnetic ion cyclotron waves at about half the proton gyrofrequency, or by emissions near the lower hybrid frequency. About 90% of all O+ heating events and about 95% of the total O+ upflow are caused by ion energization associated with broadband low-frequency waves. The dependence of the different energization types on magnetic local time magnetic latitude, magnetic activity, and season is studied. We find that the prenoon auroral region is a major source of O+ ions energized by broadband low-frequency waves.
André Mats
Norqvist Patrik
Tyrland Magnus
No associations
LandOfFree
A statistical study of ion energization mechanisms in the auroral 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 A statistical study of ion energization mechanisms in the auroral region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A statistical study of ion energization mechanisms in the auroral region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1097880