A dynamic, rotating ring current around Saturn

被引:0
作者
S. M. Krimigis
N. Sergis
D. G. Mitchell
D. C. Hamilton
N. Krupp
机构
[1] The Johns Hopkins University Applied Physics Laboratory,Department of Physics
[2] Laurel,undefined
[3] Maryland 20723,undefined
[4] USA ,undefined
[5] Office of Space Research and Technology,undefined
[6] Academy of Athens,undefined
[7] Soranou Efesiou 4,undefined
[8] 11527 Athens,undefined
[9] Greece ,undefined
[10] University of Maryland,undefined
[11] College Park,undefined
[12] Maryland 20742,undefined
[13] USA,undefined
[14] Max-Planck-Institut für Sonnensystemforschung,undefined
[15] Max-Planck-Strasse 2,undefined
[16] 37191 Katlenburg-Lindau,undefined
[17] Germany ,undefined
来源
Nature | 2007年 / 450卷
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摘要
The idea that there is a ring current of trapped particles encircling the Earth at high altitudes first emerged in the early part of the twentieth century. The idea proved right, and measurements of the current's extent and composition were made in 1957. Ring currents of a different nature were later observed at Jupiter and inferred at Saturn. The magnetospheric imaging instrument on the Cassini probe has now obtained images of the ring current at Saturn. The current is highly variable, with strong longitudinal asymmetries that corotate nearly rigidly with the planet. This contrasts with Earth's ring current, where there is no rotational modulation and initial asymmetries depend on local effects.
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页码:1050 / 1053
页数:3
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