Polar Ultraviolet Imager observations of solar wind-driven ULF auroral pulsations

Physics – Plasma Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

2

Space Plasma Physics: Mhd Waves And Instabilities (2149, 2752, 6050), Ionosphere: Auroral Ionosphere (2704), Magnetospheric Physics: Solar Wind/Magnetosphere Interactions

Scientific paper

Analysis of a sequence of auroral images acquired by the Polar Ultraviolet Imager (UVI) during a long-duration (~1.5 hr) solar wind dynamic pressure enhancement reveals auroral intensity variations in the Pc5 band. Power spectral analysis indicates that the ``auroral pulsations'' appeared in multiple frequency bands predominantly in the day sector and the dawn-dusk flank of the oval, with the maximum wave power skewing toward the dawn sector. Ground-based magnetometer recordings showed Pc5 micropulsations modulated with the auroral pulsations. The lower frequency (1-3 mHz) auroral pulsations were modulated with solar wind dynamic pressure pulses moving tailward, whereas the higher frequency (6-8 mHz) ones were not. We concluded that the lower frequency auroral pulsations were driven directly by the solar wind, whereas the higher frequency ones were associated with global compressional cavity mode. This study shows for the first time the snapshot of global Pc5 ultralow-frequency (ULF) waves and demonstrates that global far-ultraviolet (FUV) imaging such as Polar UVI provides a powerful ancillary tool for studying ULF waves on a global scale.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Polar Ultraviolet Imager observations of solar wind-driven ULF auroral pulsations 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 Polar Ultraviolet Imager observations of solar wind-driven ULF auroral pulsations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polar Ultraviolet Imager observations of solar wind-driven ULF auroral pulsations will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1860823

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.