NANOGRAIN DENSITY OUTSIDE SATURN'S A RING

被引：4

作者：

Johnson, Robert E. ^{[1
,2
]}

Tseng, Wei-Ling ^{[3
]}

Elrod, M. K. ^{[4
,5
]}

Persoon, A. M. ^{[6
]}

机构：

[1] Univ Virginia, Engn Phys, Charlottesville, VA 22902 USA

[2] NYU, Phys, 4 Washington Pl, New York, NY 10003 USA

[3] Natl Taiwan Normal Univ, 88,Sect 4,Tingzhou Rd, Taipei 11677, Taiwan

[4] NASA, Goddard Space Flight Ctr, Code 661, Greenbelt, MD 20771 USA

[5] Univ Maryland, CRESST, College Pk, MD 20742 USA

[6] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2017年 / 834卷 / 01期

关键词：

planets and satellites: individual (Saturn); planets and satellites: rings; MAIN RINGS; F-RING; PLASMA; MAGNETOSPHERE; IONOSPHERE; ENCELADUS;

D O I：

10.3847/2041-8213/834/1/L6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The observed disparity between the radial dependence of the ion and electron densities measured by the Cassini plasma (CAPS) and radio (RPWS) 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 and G rings. 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 2017 September. 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.

引用

页数：4

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