The Variable Rotation Period of the Inner Region of Saturn's Plasma Disk

  title={The Variable Rotation Period of the Inner Region of Saturn's Plasma Disk},
  author={Donald A. Gurnett and A. M. Persoon and William S. Kurth and J. B. Groene and Terrance F. Averkamp and Michele K. Dougherty and David J. Southwood},
  pages={442 - 445}
We show that the plasma and magnetic fields in the inner region of Saturn's plasma disk rotate in synchronism with the time-variable modulation period of Saturn's kilometric radio emission. This relation suggests that the radio modulation has its origins in the inner region of the plasma disk, most likely from a centrifugally driven convective instability and an associated plasma outflow that slowly slips in phase relative to Saturn's internal rotation. The slippage rate is determined by the… 

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