Tail Flapping Followed by the Dipolarization Front During a Flow Burst Event

Details Tail Flapping Followed by the Dipolarization Front During a Flow Burst Event Tail Flapping Followed by the Dipolarization Front During a Flow Burst Event

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm43a1742h&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM43A-1742

Physics

[2744] Magnetospheric Physics / Magnetotail, [2748] Magnetospheric Physics / Magnetotail Boundary Layers

Scientific paper

We present Cluster observations of a series of a bursty earthward flow of a period of ~3.5 minutes at the central current sheet in the near magnetotail. The flow velocity corresponding to the Alfvén velocity might indicate that the flow bursts were generated by bursty reconnection tailward of the spacecraft. Each flow burst was preceded by a dipolarization front which was followed by an oscillatory variation in the x- and y- components of the magnetic field with an about 1 minute delay. Based on the multi-spacecraft analysis, the first two planar dipolarization fronts were found to move earthward at 71 and 204 km/s, while the boundary normals for the accompanying non-planar flapping (Bx and By) structures lied mostly in the yz-plane. The last dipolarization front was observed to be deviated from the earthward motion, and the accompanying flapping structure oscillated in the x-, y- and z- directions, evenly. We speculate that the impact on the existing plasma exerted by the earthward dipolarization front might have caused the observed flapping oscillations. During the dipolarization and flapping event, field-aligned electron beams in the parallel and/or anti-parallel directions to the magnetic field were highly enhanced, as expected by the second adiabaticity, and a drifting ion beam in both parallel and perpendicular direction. Electron two-stream or acoustic instabilities, or electron-ion kinetic instabilities might give rise to the broadband noise and the electron solitary wave structures.

Affiliated with

Also associated with

No associations

Rating

Tail Flapping Followed by the Dipolarization Front During a Flow Burst Event 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 Tail Flapping Followed by the Dipolarization Front During a Flow Burst Event, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tail Flapping Followed by the Dipolarization Front During a Flow Burst Event will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1880438