Correspondence Between Whistler Mode Ducts and Chorus Emissions Observed on the Cluster Spacecraft

Details Correspondence Between Whistler Mode Ducts and Chorus Emissions Observed on the Cluster Spacecraft Correspondence Between Whistler Mode Ducts and Chorus Emissions Observed on the Cluster Spacecraft

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm41c1894h&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM41C-1894

Physics

[2772] Magnetospheric Physics / Plasma Waves And Instabilities, [6939] Radio Science / Magnetospheric Physics, [6964] Radio Science / Radio Wave Propagation, [6984] Radio Science / Waves In Plasma

Scientific paper

Chorus emissions are intense naturally occurring plasma waves generated outside the plasmapause near the magnetic equatorial plane. Chorus often appears in two frequency bands, with an upper band above fce/2 and a lower band below fce/2, where fce denotes equatorial gyrofrequency. Bell et al. [2009] proposed that the source region for this configuration, known as banded chorus, consists of whistler mode ducts of depleted electron density for upper band chorus and ducts of either enhanced or depleted density for lower band chorus. This poster will provide support for the correspondence between ducts and banded chorus through qualitative analysis and ray tracing of chorus emissions observed on the Cluster spacecraft. In addition to the images shown, there will be other cases for which the relationship between ducts and banded chorus will be further investigated. Frequency-time spectrogram showing banded chorus over 2 seconds for 1/26/2003, with the corresponding electron density shown in the next image.
Electron density profile versus L-shell in the equatorial plane with whistler mode enhancement and depletion ducts for 01/26/2003 from 11:59:14 to 12:39:01 UT.

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