Nanograin densities outside Saturn's A-ring

Abstract

The observed disparity between the radial dependence of the ion and electron densities measured by the Cassini plasma and radio science instruments are used to show that the region between the outer edge of Saturn's main rings and its tenuous G-ring is permeated with small charged grains (nanograins). These grains emanate from the edge of the A-ring and from the tenuous F-ring and G-ring. This is a region of Saturn's magnetosphere that is relatively unexplored, but will be a focus of Cassini's F-ring orbits prior to the end of mission in September 2017. Confirmation of the grain densities predicted here will enhance our ability to describe the formation and destruction of material in this important region of Saturn's magnetosphere.

arXiv comment8 pages, 1 figure

References in corpus (4)

• Seasonal and radial trends in Saturn's thermal plasma between the main rings and enceladus
• Modeling the Seasonal Variability of the Plasma Environment in Saturn's Magnetosphere between Main Rings and Mimas
• Nanodust detection near 1 AU from spectral analysis of Cassini/RPWS radio data
• A Survey of Low-Velocity Collisional Features in Saturn's F Ring