Subauroral proton spots visualize the Pc1 source

Details Subauroral proton spots visualize the Pc1 source Subauroral proton spots visualize the Pc1 source

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgra..11210223y&link_type=abstract

Journal of Geophysical Research, Volume 112, Issue A10, CiteID A10223

Physics

Plasma Physics

13

Magnetospheric Physics: Magnetosphere: Inner, Magnetospheric Physics: Energetic Particles: Precipitating, Magnetospheric Physics: Auroral Phenomena (2407), Space Plasma Physics: Wave/Particle Interactions (2483, 6984)

Scientific paper

Recent observations from the IMAGE spacecraft revealed a new type of proton aurora - subauroral proton spots, which map onto the vicinity of the plasmapause. It has been suggested that this proton aurora is produced by energetic proton precipitation after the interaction of ring current particles with electromagnetic ion cyclotron (EMIC) waves in the equatorial plane of the magnetosphere. We prove this suggestion by comparing observations from IMAGE with geomagnetic pulsations Pc1, which are a ground signature of EMIC waves. We found that when the proton spot is nearly conjugated with the ground station equipped with a pulsation magnetometer, the station always observes Pc1. Moreover, there is a good agreement between the appearance/disappearance of the spot and the beginning/end of the Pc1 train. We conclude that the subauroral proton spots are images on the ionospheric ``screen'' of magnetospheric regions where the ion cyclotron instability develops leading to an intense scattering of energetic protons into the loss cone.

Affiliated with

Also associated with

No associations

Rating

Subauroral proton spots visualize the Pc1 source 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 Subauroral proton spots visualize the Pc1 source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Subauroral proton spots visualize the Pc1 source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1866925