Goniopolarimetry of the SKR: Study of a Perikrone.

Details Goniopolarimetry of the SKR: Study of a Perikrone. Goniopolarimetry of the SKR: Study of a Perikrone.

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufm.p43a1018c&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #P43A-1018

Astronomy and Astrophysics

Astronomy

5408 Aurorae And Airglow, 6275 Saturn, 6939 Magnetospheric Physics (2700), 6954 Radio Astronomy, 6969 Remote Sensing

Scientific paper

We present goniopolarimetric (aka direction-finding) results of the Saturn Kilometric Radiation (SKR), using the Cassini/RPWS/HFR data. Tools to retrieve the characteristics of the source of the emissions have been developed that allow to measure the localization and beaming angle of the SKR sources as well as the localization of the foot prints of the active magnetic field lines. We present results from these analysis on a SKR burst observed during a perikrone (09/25/2006). These results are providing for the first time the beaming angle, the invariant latitude and the local time of a SKR burst. These parameters are essential to constraint the models for electron acceleration that lead to auroral precipitations in one hand, and the radio emission processes on the other hand. We show that the foot print latitudes of the active magnetic field lines are compatible with the position of the UV aurorae.

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