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Models of dust around Europa and Ganymede

机译:欧罗巴和木卫三周围的尘埃模型

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摘要

We use numerical models, supported by our laboratory data, to predict the dust densities of ejecta outflux at any altitude within the Hill spheres of Europa and Ganymede. The ejecta are created by micrometeoroid bombardment and five different dust populations are investigated as sources of dust around the moons. The impacting dust flux (influx) causes the ejection of a certain amount of surface material (outflux). The outflux populates the space around the moons, where a part of the ejecta escapes and the rest falls back to the surface. These models were validated against existing Galileo DDS (Dust Detector System) data collected during Europa and Ganymede flybys. Uncertainties of the input parameters and their effects on the model outcome are also included. The results of this model are important for future missions to Europa and Ganymede, such as JUICE (JUpiter ICy moon Explorer), recently selected as ESA's next large space mission to be launched in 2022.
机译:在实验室数据的支持下,我们使用数值模型来预测木卫二和木卫三山丘内任何海拔高度的射流流出物的粉尘密度。喷射物是由微流星体轰击产生的,对五个不同的尘埃种群进行了调查,作为月球周围尘埃的来源。撞击的粉尘通量(流入量)会导致一定量的表面物质(流出物)排出。流出物充斥着卫星周围的空间,其中一部分喷射流逸出,其余部分回落到地面。这些模型已针对欧罗巴和木卫三飞越期间收集的现有Galileo DDS(灰尘检测器系统)数据进行了验证。输入参数的不确定性及其对模型结果的影响也包括在内。该模型的结果对于未来前往欧罗巴和木卫三的任务很重要,例如最近被选为ESA将于2022年发射的下一个大型太空任务的JUICE(JUpiter ICy月球探测器)。

著录项

  • 来源
    《Planetary and space science》 |2012年第1期|p.20-27|共8页
  • 作者单位

    Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, United Kingdom,Institute de Physique du Globe de Paris, 4 avenue de Neptune, 94100 Saint-Maur-les-Fosses, France;

    Institut fuer Ceowissenschaften, Universitaet Heidelberg, 69120 Heidelberg, Germany;

    Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, United Kingdom;

    Department of Physical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, United Kingdom;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    dust; cloud; detection; europa; ganymede; galileo; JUICE;

    机译:灰尘;云;检测;欧罗巴ganymede伽利略果汁;

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