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Effects of immersed moonlets in the ring arc particles of Saturn
The European Physical Journal Special Topics ( IF 2.8 ) Pub Date : 2020-05-29 , DOI: 10.1140/epjst/e2020-900129-5
G. Madeira , S. M. Giuliatti Winter

Ring arcs are the result of particles in corotation resonances with nearby satellites. Arcs are present in Saturn and Neptune systems, in Saturn they are also associated with small satellites immersed on them. The satellite Aegaeon is immersed in the G ring arc, and the satellites Anthe and Methone are embedded in arcs named after them. Since most of the population of the arcs is formed by μm-sized particles the dissipative effects, such as the plasma drag and the solar radiation force, decrease the lifetime of the arcs. We analysed the effects of the immersed satellites on these arcs by computing the mass production rate and the perturbation caused by them in the arc particles. By comparing the lifetime of the particles and the mass production rate we concluded that Aegaeon, Anthe and Methone did not act as sources for their arcs. We took a step further by analysing a hypothetical scenario formed by an immersed moonlet of different sizes. As a result we found that regardless of the size of the hypothetical moonlet (from about 0.10 km–4.0 km) these moonlets will not act as a source. These arcs are temporary structures and they will disappear in a very short period of time.

中文翻译:

浸没式卫星在土星环弧粒子中的作用

圆弧是粒子与附近的卫星发生共共振的结果。土星和海王星系统中存在弧,在土星中,弧还与浸没在其上的小型卫星有关。卫星Aegaeon浸没在G环形弧中,而卫星Anthe和Methone则嵌在以它们命名的弧中。由于大部分电弧是由μ形成的尺寸为m的颗粒的耗散效应(例如等离子阻力和太阳辐射力)会缩短电弧的寿命。我们通过计算大规模生产率以及它们在电弧粒子中引起的扰动来分析沉浸式卫星对这些电弧的影响。通过比较粒子的寿命和大批量生产的速率,我们得出结论,Aegaeon,Anthe和Methone并不是它们电弧的来源。我们通过分析由不同大小的浸没式小卫星形成的假想场景,进一步采取了措施。结果,我们发现,不管假想的小卫星的大小(大约0.10 km–4.0 km),这些小卫星都不会充当源。这些弧是临时结构,它们将在很短的时间内消失。
更新日期:2020-05-29
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