Faraday rotation of Jupiter's decametric radiation

Details Faraday rotation of Jupiter's decametric radiation Faraday rotation of Jupiter's decametric radiation

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...247..235b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 247, no. 1, July 1991, p. 235-246.

Astronomy and Astrophysics

Astronomy

20

Jupiter (Planet), Planetary Radiation, Radio Sources (Astronomy), Decametric Waves, Faraday Effect, Planetary Magnetospheres

Scientific paper

Results are reported of recent observations of the Faraday rotation of Jovian decametric emission (DAM), with emphasis on the degree of linear polarization (or the ellipticity of the polarization ellipse) and its change with time, from one source to another, with the geometry of observations, and also on the position angle of the linear component, which rotates during the propagation between the source and the observer. For most accurate measurements done on three Io-B emissions, the polarization angle at Jupiter is found, on average, to be a position angle +15 deg from the Jovian northern pole. It is shown that the linear approximation generally used to determine the angle of the polarization ellipse at Jupiter and the amount of rotation in the earth's ionosphere is not valid. The quadratic approximation is better able to explain the observations because it includes a parameter which describes the wave propagation curvature.

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