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Dynamik und Kinetik schmaler Staubringe

狭窄尘埃环的动力学和动力学

基本信息

批准号：
110570696
负责人：
Professor Dr. Frank Spahn, Ph.D.
金额：
--
依托单位：
Institut für Geologische Wissenschaften
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/110570696?language=en
关键词：
Dynamik und Kinetik schmaler Staubringe

项目摘要

Saturn s ring system contains a number of narrow dust rings, such as the F ring, the Encke Gap ringlets, and several ringlets in the Cassini division. Already from Pioneer data (Cuzzi and Burns, 1988) it was concluded that the F ring assumes its peculiar clumpy and twisted appearance due to the gravitational action and interaction of a belt of small unseen moons embedded in a dusty ring, a scenario confirmed by data from the Cassini mission (Murray et al., 2008). A very similar behavior is found for the central dusty ring in the Encke Gap (Ferrari and Brahic, 1997; Hahn, 2006) where the presence of a belt of small embedded moons has been conjectured to serve as main sources for the observed dust near Pan s orbit. In this project we will develop a model for the kinetic balance of dust production, dynamical evolution, and loss mechanisms for such a belt of moons. This has not been studied so far. Detailed modeling and comparison to Cassini observations will help to constrain the parameters of the physics of dust creation, the properties of the dust, as well as the distribution and dynamics of the moons. In this way it will be possible to identify common physical processes in dust rings near the Roche limit - and last but not least - to detect yet unseen embedded moonlets.

土星S环系包含许多狭窄的尘埃环，如F环、恩克缺口小环和卡西尼区的几个小环。从先驱者数据(Cuzzi和Burns，1988)已经得出结论，由于嵌入尘埃环中的一条看不见的小卫星带的引力作用和相互作用，F环呈现出特殊的块状和扭曲的外观，卡西尼任务的数据证实了这一情况(Murray等人，2008年)。在恩克缺口的中心尘埃环上也发现了非常类似的行为(Ferrari和Brahic，1997年；哈恩，2006年)，在那里，一条嵌入的小卫星带的存在被推测为潘S轨道附近观测到的尘埃的主要来源。在这个项目中，我们将建立这样一个卫星带的尘埃产生、动力演化和损失机制的动态平衡模型。到目前为止，还没有人研究过这一点。详细的建模和与卡西尼号观测的比较将有助于限制尘埃产生的物理参数、尘埃的性质以及卫星的分布和动力学。这样，就有可能确定罗氏极限附近尘埃环中的常见物理过程--最后但并非最不重要的--探测到尚未被看到的嵌入的小卫星。