Periodic intensity variations in global ENA images of Saturn
Periodic intensity variations in global ENA images of Saturn
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DOI：
10.1029/2005gl023656
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发表时间：
2005-11
影响因子：
5.2
通讯作者：
C. Paranicas;D. Mitchell;E. Roelof;P. Brandt;D. Williams;S. M. Krimigis;B. Mauk
中科院分区：
文献类型：
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作者：
C. Paranicas;D. Mitchell;E. Roelof;P. Brandt;D. Williams;S. M. Krimigis;B. Mauk
在土星轨道上的特定时间段内，卡西尼号的离子和中性相机（印加）探测到了周期性的全球ENA信号。在这样的时期拍摄的图像显示，除了稳态分量外，还存在旋转源分量;当从黎明附近观看时，这两个分量在午夜扇区都有峰值亮度。我们提出了一个模型，合成的数据的一些基本特征，并给出了良好的协议与集成信号。这两个组成部分，以及康普顿-Getting效应，其重要性是以前在ENA成像中未被认识到的，需要解释数据的某些方面。
During select time periods in orbit about Saturn, Cassini's Ion and Neutral Camera (INCA) has detected a periodic global ENA signal. Images taken during such periods reveal the presence of a rotating source component in addition to a steady‐state component; both components have peak brightness in the midnight sector, when viewed from near dawn. We present a model that synthesizes some of the basic features of the data and gives good agreement with the integrated signal. Both components, as well as the Compton‐Getting effect whose importance was previously unrecognized in ENA imaging, are needed to explain some aspects of the data.