Comparative analysis of plasma environment at Venus and Mars - Venus Express and Mars Express observations and simulations

金星和火星等离子体环境的比较分析——金星快车和火星快车的观测和模拟

• 批准号: 57218068
• 负责人: Professor Dr. Uwe Motschmann, Ph.D.
• 金额: --
• 依托单位: Max-Planck-Institut für Sonnensystemforschung (MPS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/57218068?language=en
• 关键词: Comparative; analysis; plasma; environment; Venus

The general scientific objective of the proposal is the investigation of the interaction of the Venus atmosphere and ionosphere with the interplanetary medium. The study will be based on observations made by the Analyzer of Space Plasma and Energetic Atoms (ASPERA-4) and magnetometer (MAG) experiments on Venus Express (VEX). It will be augmented by a comparison with the situation at Mars, made possible by the successful operation of ASPERA-3 on MEX. This comparative study of the two unmagnetized planets, which induce the magnetospheres around them, is a unique opportunity since almost identical plasma and energetic neutral atom packages (ASPERA-3 and 4) are exploring near-Mars and near-Venus space at the same epoch. The investigations to be performed will address the fundamental question how do strongly the solar wind and the electromagnetic fields affect the planetary atmospheres. The global objective of the proposed investigation is to provide a coherent picture how energy is transferred from the solar wind to surrounding regions of the unmagnetized planets with ionospheric/atmospheric shells and to clarify its environmental effects on the planetary atmospheres. The final product of the research will be a physical model of the escape of the planetary atmosphere, which synthesizes theory, observations and simulations.

该提案的总体科学目标是调查金星大气层和电离层与行星际介质的相互作用。这项研究将以空间等离子体和高能原子分析仪（ASPERA-4）和金星快车（VEX）上的磁力计（MAG）实验所作的观测为基础。通过与火星的情况进行比较，将使其更加充实，而火星的情况是由于ASPERA-3在MEX上的成功运行而成为可能的。对两颗未磁化行星的比较研究是一个独特的机会，因为几乎相同的等离子体和高能中性原子包（ASPERA-3和4）正在同一时期探索火星附近和金星附近的空间。将要进行的研究将解决太阳风和电磁场如何强烈影响行星大气的基本问题。拟议调查的全球目标是提供一个连贯的画面，能量是如何从太阳风转移到周围地区的非磁化行星电离层/大气层壳，并澄清其对行星大气的环境影响。研究的最终成果将是行星大气逃逸的物理模型，该模型综合了理论、观测和模拟。

项目成果

Plasma environment of Venus: Comparison of Venus Express ASPERA‐4 measurements with 3‐D hybrid simulations

• DOI: 10.1029/2008je003174
• 发表时间: 2007-12
• 期刊: Journal of Geophysical Research
• 作者: C. Martinecz;A. Boesswetter;M. Fränz;E. Roussos;J. Woch;N. Krupp;E. Dubinin;U. Motschmann;S. Wie

Bursty escape fluxes in plasma sheets of Mars and Venus

• DOI: 10.1029/2011gl049883
• 发表时间: 2012-01
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: E. Dubinin;M. Fraenz;J. Woch;T. Zhang;J. Wei;A. Fedorov;S. Barabash;R. Lundin

Ion Energization and Escape on Mars and Venus

• DOI: 10.1007/s11214-011-9831-7
• 发表时间: 2011-10
• 期刊: Space Science Reviews
• 影响因子: 10.3
• 作者: E. Dubinin;M. Fraenz;A. Fedorov;R. Lundin;N. Edberg;F. Duru;O. Vaisberg