A New Ring Current Model for Saturn

被引：4
作者：
Carbary, J. F. [1 ]
机构：
[1] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA
来源：
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2019年 / 124卷 / 05期
关键词：
Saturn ring current;
D O I：
10.1029/2019JA026560
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The ring current of Saturn is obtained by taking the curl of the observed magnetic field. An analytical model of this ring current can then be obtained by fitting it to a lognormal in rho and a Gaussian in z. Local time dependence is included as a harmonic expansion in phi for coefficients of the lognormal; radial dependence is included as a quadratic expansion in rho of the width of the Gaussian. In this model, the ring current peaks at similar to 0.25 MA/R-S(2) at similar to 10 R-S on the nightside near similar to 1 hr. The ring current strength minimizes at similar to 0.17 MA/R-S(2) on the dayside near similar to 16 hr. The cross-sectional shape of the ring current is a teardrop extending from similar to 5 to similar to 20 R-S or more.
引用
收藏
页码：3378 / 3389
页数：12
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