New Type of Periodic Bursts of Non-Io Jovian Decametric Radio Emission. Planetary Radio Emissions| PLANETARY RADIO EMISSIONS VII 7|

Résumé 0

Analyzing the data acquired by STEREO/WAVES,Wind/WAVES and Cassini/ RPWS instruments during the time interval between the years 2002-2010 we have revealed unusual periodic radio bursts of the non-Io controlled component of the Jovian decametric radiation (non-Io DAM). These non-Io bursts are typically observed in a frequency range from ~ 5 MHz up to ~ 10–16 MHz and recur during several Jovian days with a surprisingly new period of ~ 10.07 hours. This period is 1.5% longer than the rotation period of the inner Jovian magnetosphere (System III, 9.925 hour). The occurrence probability of these periodic bursts has been found to be significantly higher in the sector of Jovian Central Meridian Longitude between 300? and 60? (via 360?), corresponding to the region of non-Io-C sources. Stereoscopic observations performed by STEREO/WAVES as well as Wind/WAVES and Cassini/RPWS suggest that the sources of the periodic bursts sub-corotate with Jupiter. The relations between the occurrence of the periodic bursts and solar wind activity have been analyzed.