Sudden enhancement of solar wind dynamic pressure and dayside detached aurora

Details Sudden enhancement of solar wind dynamic pressure and dayside detached aurora Sudden enhancement of solar wind dynamic pressure and dayside detached aurora

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm41b0814z&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM41B-0814

Physics

2139 Interplanetary Shocks, 2704 Auroral Phenomena (2407), 2716 Energetic Particles, Precipitating, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Dayside detached auroras (DDA) refer to auroras observed at sub-auroral latitudes (down to 60 degree of magnetic latitude) on the dayside. They were detected by the FUV instruments on-board the IMAGE satellite [Fuselier et al., 2000, 2001; Burch et al., 2001]. The occurrence of these DDA seem to be correlated with sudden solar wind dynamic pressure enhancements. In this paper we show that, based on IMAGE FUV data, DDA are usually short lived with lifetime of a few minutes and their MLT location depends on IMF By. We find that DDA are best observed in IMAGE FUV SI-12 (Doppler red shifted Lyman Alpha line) images. This indicates that energetic proton precipitation is the major source of DDA. We also observe a sudden brightening in the dayside and nightside auroral oval associated with DDA. We find that there are two kinds of DDA, according to their development history: (1) isolated from the auroral oval during their lifetime, (2) split from the dayside auroral oval. In this presentation we will show a few examples from IMAGE to illustrate basic characteristics of DDA. We will also discuss possible mechanisms that lead to the production of the DDA, including loss cone instability, adiabatic compression, and impulsive penetration of the solar wind plasma. References\Burch, J., et al., EOS Trans. AGU, 82, Spring Meet. Suppl., Abstract SM21A-06, 2001. Fuselier, S.A., et al., EOS Trans. AGU, 81, Fall Meet. Suppl., Abstract SM71B-03, 2000.\Fuselier, S.A., et al., Geophys. Res. Lett., 28, 1163, 2001.

Affiliated with

Also associated with

No associations

Rating

Sudden enhancement of solar wind dynamic pressure and dayside detached aurora 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 Sudden enhancement of solar wind dynamic pressure and dayside detached aurora, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sudden enhancement of solar wind dynamic pressure and dayside detached aurora will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1384887