The left-hand polarization sense of the Jovian decameter radiation

Details The left-hand polarization sense of the Jovian decameter radiation The left-hand polarization sense of the Jovian decameter radiation

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...91..453b&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 91, no. 3, Dec. 1991, p. 453-467.

Astronomy and Astrophysics

Astronomy

14

High Frequencies, Jupiter (Planet), Planetary Magnetospheres, Planetary Radiation, Polarized Electromagnetic Radiation, Radio Bursts, Circular Polarization, Gyrofrequency, Io, Polarimeters, Radio Astronomy, Voyager Project

Scientific paper

The present study investigates decameter radiation from the Jovian southern hemisphere statistically from 95 events. From the variation of the intensity with time and frequency, the occurrence in the Io-CML plane and the spectral characteristics of the left-hand emissions are examined. It is shown that the Io-controlled emissions IoA and IoD are associated with vertex-early arcs, and IoC with VLA. Non-Io-controlled emissions are observed only in the non-Io A-C region; they have the same dynamic spectra (VLA) as Io-controlled emissions. The HF limit of the left-hand polarized radiation is usually between 18 and 25 MHz, for both Io and non-Io events. Left-hand radiation has never been observed at frequencies higher than 25 MHz, implying that the maximum field strength in Jupiter's southern hemisphere is approximately 9 Gauss.

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