Observations of whistler-mode waves close to the plasmasphere boundary layer

0518225 - ÚFA 2020 US eng A - Abstrakt
Santolík, Ondřej - Hospodarsky, G. B. - Pickett, J. - Kurth, W. - Cornilleau-Wehrlin, N. - Kletzing, C.
Observations of whistler-mode waves close to the plasmasphere boundary layer.
AGU Fall Meeting. Washington: American Geophysical Union, 2019. SM21A-02.
[AGU Fall Meeting 2019. 09.12.2019-13.12.2019, San Francisco]
Institucionální podpora: RVO:68378289
Klíčová slova: plasmasphere boundary layer * plasmapause * whistler mode waves
Obor OECD: Fluids and plasma physics (including surface physics)
https://agu.confex.com/agu/fm19/meetingapp.cgi/Paper/517686

Whistler mode waves have been routinely detected in the plasmapause
density gradient by different spacecraft missions (for instance,
Polar, Cluster, and Van Allen Probes). These waves can be observed
as broadband hiss and/or as discrete wave packets
of chorus-like emissions. Whistler mode waves occurring close to the
plasmapause have been discussed as principal factors
which influence the dynamics of the slot region in the radiation belts
via pitch-angle diffusion and subsequent precipitation of energetic electrons.
We investigate propagation and polarization properties of these waves
by direct spacecraft measurements in separate spatial
points and by ray tracing simulations based on these measurements.
Estimated directions of their Poynting vectors indicate that their source region
is close to the geomagnetic equatorial plane which is consistent with their
anticipated local generation by linear and nonlinear plasma instabilities,
or by nonlinear parametric interactions.
Trvalý link: http://hdl.handle.net/11104/0303384