Extraordinary field-aligned current signatures in Saturn's high-latitude magnetosphere: Analysis of Cassini data during Revolution 89
Extraordinary field-aligned current signatures in Saturn's high-latitude magnetosphere: Analysis of Cassini data during Revolution 89
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土星高纬度磁层中异常的场对准电流特征：卡西尼号革命期间数据的分析 89
DOI：
10.1029/2010ja015612
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Bunce E
中科院分区：
文献类型：
--
作者：
Bunce E
在第 89 次革命的近点经过期间，特别是 2008 年的第 291 天，卡西尼号太空船在土星高纬度南半球的午夜和黎明区域观察到了不寻常的场对准电流特征。人们发现开场线区域在靠近极点处收缩，并被一个不寻常的区域包围，该区域包含热 keV 电子和指示超共旋流的“主导”场特征。表明副旋转流的通常“滞后”场也存在于低纬度地区，尽管其强度不寻常。卡西尼号在 2008 年经过的大约 40 个类似的夜面极光区域中是独一无二的，因此整个场对准电流系统由一个向下电流的中心区域和两侧的向上电流区域组成。这一独特的特征恰逢卡西尼号首次原位遭遇土星千米辐射源区域，该区域位于邻近开闭场线边界的不寻常的向上电流极向区域内。我们认为这些不寻常的情况与土星尾部的一次主要开放通量闭合事件有关，可能是由太阳风压缩磁层引发的。
During the periapsis pass of Revolution 89, specifically on day 291 of 2008, the Cassini spacecraft observed unusual field‐aligned current signatures in Saturn's high‐latitude southern hemisphere in the midnight and dawn sector. The region of open field lines was found to be contracted close to the pole, and surrounded by an unusual region containing hot keV electrons and ‘leading’ field signatures indicative of super‐corotating flow. Usual ‘lagging’ fields indicative of sub‐corotating flow were also present at lower latitudes, though of unusual strength. Unique within the ∼40 similar nightside auroral region Cassini passes during 2008, the overall field‐aligned current system thus consisted of a central region of downward current flanked by two regions of upward current. This distinctive signature coincided with the first in situ encounter of Cassini with a source region of Saturn kilometric radiation, located within the unusual poleward region of upward current adjacent to the open‐closed field line boundary. We propose that these unusual conditions relate to a major open flux closure event in Saturn's tail, possibly triggered by solar wind compression of the magnetosphere.
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DOI：
10.1029/2008ja013257
发表时间：
2008-09
期刊：
Scopus
影响因子：
--
作者：
E. Bunce;C. Arridge;J. Clarke;A. Coates;S. Cowley;M. Dougherty;Jean-Claude Gérard;D. Grodent;K. Hansen;J. Nichols;D. Southwood;D. Southwood;D. Talboys
通讯作者：
E. Bunce;C. Arridge;J. Clarke;A. Coates;S. Cowley;M. Dougherty;Jean-Claude Gérard;D. Grodent;K. Hansen;J. Nichols;D. Southwood;D. Southwood;D. Talboys
土星磁层极光电流系统的特征：高纬度卡西尼号观测
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
C. Arridge;A. Coates;D. Talboys;E. Bunce;S. Cowley;M. Dougherty
通讯作者：
M. Dougherty
土星磁层中等离子体的组成和动力学
影响因子：
56.9
作者：
D. Young;J. Berthelier;M. Blanc;J. Burch;S. Bolton;A. Coates;F. Crary;R. Goldstein;M. Grande;T. Hill;R. E. Johnson;R. Baragiola;V. Kelha;D. McComas;K. Mursula;E. Sittler;K. Svenes;K. Szegö;P. Tanskanen;M. Thomsen;S. Bakshi;B. Barraclough;Z. Bebesi;D. Delapp;M. Dunlop;J. Gosling;J. Furman;L. Gilbert;D. Glenn;C. Holmlund;J. Illiano;G. Lewis;D. Linder;S. Maurice;H. McAndrews;B. T. Narheim;E. Pallier;D. Reisenfeld;A. Rymer;H. Smith;Robert L. Tokar;J. Vilppola;C. Zinsmeyer
通讯作者：
C. Zinsmeyer
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
D. Grodent;J. Gérard;S. Cowley;E. Bunce;J. Clarke
通讯作者：
J. Clarke
太阳风共转相互作用区域与土星千米辐射爆发的相位和强度之间的关系
影响因子：
1.9
作者：
Badman S
通讯作者：
Badman S