The plasma interaction of Saturn's moon Titan: Modelling the dynamics of the ionosphere and the emission of energetic neutral atoms

土星卫星泰坦的等离子体相互作用：模拟电离层的动力学和高能中性原子的发射

• 批准号: 211827208
• 负责人: Professor Dr. Joachim Saur, since 9/2014
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/211827208?language=en
• 关键词: plasma; interaction; Saturn; moon; Titan

The purpose of this project is to analyze the interaction between the ionosphere of Saturn’s largest moon Titan and the corotating plasma in the giant planet’s magnetosphere by applying a hybrid simulation code (kinetic ions, fluid electrons). In the first part, we plan to incorporate realistic ionospheric chemistry into an existing hybrid model of Titan’s plasma environment. So far, a sophisticated description of Titan’s ionosphere has not been possible within the framework of the hybrid approach, mainly due to the coarse grid resolution achieved by these codes. We overcome this problem by means of a recently developed, spatially adaptive hybrid code that is fully parallelized. The expanded hybrid code will then be applied to study plasma and magnetic field data from recent Cassini flybys during which the spacecraft passed deep into Titan’s ionosphere. In contrast to any other existing model of Titan’s magnetospheric environment, the modified hybrid code will be able to simultaneously describe large-scale asymmetries of the interaction due to finite ion gyroradii and small-scale processes in the moon’s ionosphere. In the second part, we will further expand this code to develop a self-consistent model for the emission of energetic neutral atoms (ENAs) from Titan’s atmosphere. Based on this model, we plan to support the analysis of data from the Ion and Neutral Camera (INCA) aboard Cassini, providing snapshots of the global plasma and magnetic field configuration near Titan.

该项目的目的是通过应用混合模拟代码（动力学离子，流体电子）来分析土星最大的卫星泰坦的电离层与巨行星磁层中的共转等离子体之间的相互作用。在第一部分中，我们计划将现实的电离层化学纳入土卫六等离子体环境的现有混合模型。到目前为止，土卫六的电离层的复杂的描述还没有可能的混合方法的框架内，主要是由于粗网格分辨率实现这些代码。我们克服了这个问题，通过最近开发的，空间自适应的混合代码，是完全并行化。扩展后的混合代码将被应用于研究卡西尼号最近飞越泰坦电离层的等离子体和磁场数据。与土卫六磁层环境的任何其他现有模型相比，修改后的混合代码将能够同时描述由于有限离子gyroradii和月球电离层中的小尺度过程而引起的相互作用的大尺度不对称性。在第二部分中，我们将进一步扩展该代码，以开发一个自洽模型，用于从土卫六大气中发射高能中性原子（ENA）。基于这个模型，我们计划支持卡西尼号上的离子和中性相机（印加）的数据分析，提供土卫六附近的全球等离子体和磁场配置的快照。

项目成果

Variability of Titan's induced magnetotail: Cassini magnetometer observations

泰坦感应磁尾的变化：卡西尼号磁力计观测

• DOI: 10.1002/2013ja019608
• 发表时间: 2024
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: S. Simon;F.M. Neubauer;A. Wennmacher;M.K. Dougherty
• 通讯作者: M.K. Dougherty

Structure of Titan's induced magnetosphere under varying background magnetic field conditions: Survey of Cassini magnetometer data from flybys TA–T85

不同背景磁场条件下土卫六感应磁层的结构：来自飞越 TAâT85 的卡西尼磁力计数据调查

• DOI: 10.1002/jgra.50096
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: S. Simon;S.C. van Treeck;A. Wennmacher;J. Saur;F.M. Neubauer;C.L. Bertucci;M.K. Dougherty
• 通讯作者: M.K. Dougherty

Hybrid simulation of Titan's interaction with the supersonic solar wind during Cassini's T96 flyby

卡西尼号 T96 飞越期间土卫六与超音速太阳风相互作用的混合模拟

• DOI: 10.1002/2015gl066848
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: M. Feyerabend;S. Simon;F.M. Neubauer;U. Motschmann;C. Bertucci;N.J.T. Edberg;G.B. Hospodarsky;W.S. Kurth
• 通讯作者: W.S. Kurth

Filamented ion tail structures at Titan: A hybrid simulation study

土卫六的丝状离子尾结构：混合模拟研究

• DOI: 10.1016/j.pss.2015.07.008
• 期刊: Planetary and Space Science
• 影响因子: 2.4
• 作者: M. Feyerabend;S. Simon;U. Motschmann;L. Liuzzo
• 通讯作者: L. Liuzzo

The interaction between Saturn’s moons and their plasma environments

土星卫星与其等离子体环境之间的相互作用

• DOI: 10.1016/j.physrep.2015.09.005
• 期刊: Physics Reports
• 作者: S. Simon;E. Roussos;C.S. Paty
• 通讯作者: C.S. Paty