Energetic neutral atom emissions from Titan interaction with Saturn's magnetosphere

被引：36
|
作者：
Mitchell, DG [1 ]
Brandt, PC
Roelof, EC
Dandouras, J
Krimigis, SM
Mauk, BH
机构：
[1] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 21042 USA
[2] Ctr Etud Spatiale Rayonnements, F-31028 Toulouse, France
来源：
SCIENCE | 2005年 / 308卷 / 5724期
关键词：
D O I：
10.1126/science.1109805
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The Cassini Magnetospheric Imaging Instrument (MIMI) observed the interaction of Saturn's largest moon, Titan, with Saturn's magnetosphere during two close flybys of Titan on 26 October and 13 December 2004. The MIMI Ion and Neutral Camera (INCA) continuously imaged the energetic neutral atoms (ENAs) generated by charge exchange reactions between the energetic, singly ionized trapped magnetospheric ions and the outer atmosphere, or exosphere, of Titan. The images reveal a halo of variable ENA emission about Titan's nearly collisionless outer atmosphere that fades at larger distances as the exospheric density decays exponentially. The attitude of the emissions varies, and they are not symmetrical about the moon, reflecting the complexity of the interactions between Titan's upper atmosphere and Saturn's space environment.
引用
收藏
页码：989 / 992
页数：4
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