New periodicity in Jovian decametric radio emission

作者：Panchenko M^*; Rucker H O; Kaiser M L; Cyr O C St; Bougeret J L; Goetz K; Bale S D

来源：Geophysical Research Letters, 2010, 37: L05106.

DOI：10.1029/2010GL042488

We report on the finding of a new periodicity in the Jovian decametric radio emission (DAM). Periodic bursts of non-Io component of DAM which recur with a period 1.5% longer than the Jupiter rotation (System III) have been found in the dynamic radio spectra acquired by STEREO/WAVES, Wind/WAVES and Cassini/RPWS during the years 2002-2008. Typically, the bursts appear very periodically over several Jovian days with a decreasing intensity and they display a negative frequency drift. All the bursts were detected within the same sector of Jovian Central Meridian Longitude (III), between 300 degrees and 60 degrees (via 360 degrees) of CML (III), close to the region of the non-Io-C source. No correlation has been found with the position of Io. Considering the simultaneous stereoscopic observations onboard STEREO-A and STEREO-B, as well as Wind and Cassini we can conclude that the sources of the periodic bursts most probably sub-corotate with Jupiter. Citation: Panchenko, M., H. O. Rucker, M. L. Kaiser, O. C. St. Cyr, J.-L. Bougeret, K. Goetz, and S. D. Bale (2010), New periodicity in Jovian decametric radio emission, Geophys. Res. Lett., 37, L05106, doi: 10.1029/2010GL042488.