Statistical ring current of Saturn
Statistical ring current of Saturn
复制标题
土星环电流的统计
DOI：
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复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
C. Arridge
中科院分区：
文献类型：
--
作者：
J. Carbary;N. Achilleos;C. Arridge
[1]根据卡西尼号磁强计5年多的观测得出的中值磁场的旋度，已经确定了土星的统计环流。这里讨论的主要问题是通过直接计算从2004年到2010年由麦克斯韦方程∇×B=μ0J产生的扰动磁场B的环电流J的对称部分来计算土星的统计环电流。这项研究验证了以前的研究，基于较少的数据和不使用∇×ϕB，并表明环电流向东(在+ϕ或对转方向)，并从∼3 RS延伸到至少∼20 RS(1 RS=660,268公里)，这是日侧磁层顶附近；环电流在∼9.5RS处的峰值强度为∼75pA/m2；环电流的半宽度为∼1.5RS。这项研究的两个结果是，环流向北弯曲，正如土星等离子体片的“碗”模型所暗示的那样，环流的总和为9.2±1.0 Ma。在未来的努力中，这里给出的统计环电流可以用于计算土星的磁场，用于粒子漂移、场线映射和J×B力。
[1] The statistical ring current of Saturn has been determined from the curl of the median magnetic field derived from over 5 years of observations of the Cassini magnetometer. The main issue addressed here is the calculation of the statistical ring current of Saturn by directly computing, for the first time, the symmetrical part of the ring current J from the Maxwell equation ∇ × B = μ0J from assembling the perturbation magnetic field B from 2004 through 2010. This study validates previous studies, based on fewer data and not using ∇ × B, and shows that the ring current flows eastward (in the +ϕ or corotation direction) and extends from ∼3 RS to at least ∼20 RS (1 RS = 60,268 km), which is the vicinity of the dayside magnetopause; that the ring current has a peak strength of ∼75 pA/m2 at ∼9.5 RS; and that the ring current has a half-width of ∼1.5 RS. Two outcomes of this study are that the ring current bends northward, as suggested by the “bowl” model of Saturn's plasma sheet, and that the total ring current is 9.2 ± 1.0 MA. In the context of future endeavors, the statistical ring current presented here can be used for calculations of the magnetic field of Saturn for particle drifts, field line mapping, and J × B force.
影响因子：
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作者：
C. Arridge;K. Khurana;C. Russell;D. Southwood;N. Achilleos;M. Dougherty;A. Coates;H. Leinweber
通讯作者：
C. Arridge;K. Khurana;C. Russell;D. Southwood;N. Achilleos;M. Dougherty;A. Coates;H. Leinweber
土星磁盘中的力平衡模型
DOI：
10.1111/j.1365-2966.2009.15865.x
发表时间：
2010
影响因子：
4.8
作者：
Achilleos N
通讯作者：
Achilleos N
土星白天磁层的磁场结构及其到电离层的映射：环流模型的结果
DOI：
10.1029/2007ja012538
发表时间：
2008
期刊：
Space Physics
影响因子：
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作者：
Bunce E
通讯作者：
Bunce E