Reference : Precipitation of auroral protons in detached arcs
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/29696
Precipitation of auroral protons in detached arcs
English
Immel, Thomas J [> > > >]
Mende, Stephen B [> > > >]
Frey, Harald U [> > > >]
Peticolas, Laura M [> > > >]
Carlson, Charles W [> > > >]
Gérard, Jean-Claude mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
Hubert, Benoît mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
Fuselier, Stephen A [> > > >]
Burch, James L [> > > >]
1-Jun-2002
Geophysical Research Letters
American Geophysical Union
29
14-1
Yes (verified by ORBi)
International
0094-8276
Washington
DC
[en] Magnetospheric Physics: Auroral phenomena (2407) ; Atmospheric Composition and Structure: Airglow and aurora ; Magnetospheric Physics: Plasmasphere ; Magnetospheric Physics: Ring current
[en] Recent global-scale observations by the IMAGE-FUV instrument demonstrate the existence of regions of particle precipitation at sub-auroral latitudes on the dayside. The signature of this precipitation is seen infrequently, but when so, it is clear in all 3 channels of the FUV instrument. A conjugate hemisphere conjunction with the FAST satellite demonstrates the presence of precipitating protons and the notable absence of precipitating electrons in these arcs. With this knowledge, one can determine the mean energy and energy flux of the precipitating protons by intercomparison of the response in the three FUV channels. Assuming that the protons have a kappa energy distribution, the mean energy is found to be ~20 keV, with a peak in total energy flux of ~1 mW/m[SUP]2[/SUP]/sec, consistent with fits to the FAST ion measurements. These phenomena are observed mainly during times of high solar wind dynamic pressure and variable interplanetary magnetic field, and are associated with earlier nightside enhancements in the brightness and latitudinal extent of the proton aurora.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/29696
10.1029/2001GL013847
http://adsabs.harvard.edu/abs/2002GeoRL..29k..14I

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