Physics
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...100.3649v&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 100, no. A3, p. 3649-3655
Physics
22
Auroras, Brightness, Daytime, Interplanetary Magnetic Fields, Mathematical Models, Solar Wind, Cross Correlation, Current Sheets, Data Reduction, Explorer 50 Satellite, Kelvin-Helmholtz Instability, Plasma Turbulence, Viking Spacecraft
Scientific paper
Instantaneous Viking optical images at UV Lyman-Birge-Hopfield wavelength are used to study the occurrence of dayside auroral bright spots versus the upstream solar wind parameters observed by the IMP 8 spacecraft. A survey study of 68 passes indicates that dayside auroral bright spots are most likely observed in the afternoon sector, most commonly have one to four spots simultaneously, and most commonly are separated by 0.25-0.75 MLT. They also occur most commonly with the following solar wind conditions: high speed (greater than 500 km/s), low density, B(sub y) less than 0, and interplanetary magnetic field in the radial direction; but they have no dependence on B(sub z), B(sub x), or solar wind pressure. This suggests that dayside auroral bright spots are caused by alternating field-aligned current regions that map to plasma vortices formed in the magnetospheric boundary layer by the Kelvin-Helmholtz instability.
Murphree John S.
Vo Hien-Bich
No associations
LandOfFree
A study of dayside auroral bright spots seen by the Viking auroral imager 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 study of dayside auroral bright spots seen by the Viking auroral imager, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A study of dayside auroral bright spots seen by the Viking auroral imager will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-844866