Variability of Southern and Northern SKR Periodicities
Variability of Southern and Northern SKR Periodicities
复制标题
南方和北方 SKR 周期的变化
DOI：
--
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
L. Lamy
中科院分区：
文献类型：
--
作者：
L. Lamy
在土星公里辐射（SKR）旋转调制的存在所引起的持续问题中，10.8小时SKR周期在数周到数年内以1%的水平变化的起源仍然很有趣。虽然它的短期波动（20-30天）与太阳风速度的变化有关，但它的长期波动（数月至数年）被认为是由土卫二的质量负荷和/或季节变化引发的。自从最近在10.8小时和10.6小时发现了两个独立的周期以来，这种情况变得更加复杂，每个周期都随时间变化，分别对应于位于南半球（S）和北方（N）的SKR源。在这里，六年的卡西尼号连续无线电测量的调查，从2004年（preequinox）到2010年底（post-equinox）。从S和N SKR出发，分别导出了各半球的射电周期和相位系统，并在几年到几个月的时间尺度上研究了射电周期的波动。然后，S相位被用来证明S SKR旋转调制是一致的一个内在的旋转现象，与早期的旅行者图片。
Among the persistent questions raised by the existence of a rotational modulation of the Saturn Kilometric Radiation (SKR), the origin of the variability of the 10.8 hours SKR period at a 1% level over weeks to years remains intriguing. While its short-term fluctuations (20-30 days) have been related to the variations of the solar wind speed, its long-term fluctuations (months to years) were proposed to be triggered by Enceladus mass-loading and/or seasonal variations. This situation has become even more complicated since the recent identification of two separated periods at 10.8h and 10.6h, each varying with time, corresponding to SKR sources located in the southern (S) and the northern (N) hemispheres, respectively. Here, six years of Cassini continuous radio measurements are investigated, from 2004 (preequinox) to the end of 2010 (post-equinox). From S and N SKR, radio periods and phase systems are derived separately for each hemisphere and fluctuations of radio periods are investigated at time scales of years to a few months. Then, the S phase is used to demonstrate that the S SKR rotational modulation is consistent with an intrinsically rotating phenomenon, in contrast with the early Voyager picture.
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
发表时间：
2010
期刊：
Space Physics
影响因子：
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作者：
Bunce E
通讯作者：
Bunce E
土星磁层周期振荡：赤道和高纬度磁场周期与南北土星千米辐射周期的比较
DOI：
10.1029/2010ja015666
发表时间：
2010
期刊：
Space Physics
影响因子：
--
作者：
Andrews D
通讯作者：
Andrews D