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New periodicity in Jovian decametric radio emission
Author(s) -
Panchenko M.,
Rucker H. O.,
Kaiser M. L.,
St. Cyr O. C.,
Bougeret J.L.,
Goetz K.,
Bale S. D.
Publication year - 2010
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2010gl042488
Subject(s) - jovian , physics , jupiter (rocket family) , longitude , rotation period , astronomy , radio wave , magnetosphere , astrophysics , planet , plasma , latitude , spacecraft , stars , quantum mechanics , saturn
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° and 60° (via 360°) 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.