• ISSN 2097-1893
  • CN 10-1855/P

火星与金星弓激波和磁堆积边界研究进展

Review of boundary model studies in the Venusian and Martian induced magnetosphere

  • 摘要: 金星和火星虽然没有全球磁场,但是由于它们有大气层和电离层,在与太阳风耦合的过程中也会产生感应磁层以及磁堆积边界和弓激波等分界面. 这些分界面不仅能反映上游太阳风参数的变化,同时也可以表征行星空间环境的状态. 因此,相关分界面建模研究不仅有助于了解太阳风-行星空间耦合的基本过程,也可为行星探测和研究提供更准确的分界面位置数据,对类地行星的演化和发展也有重要的启示. 研究表明,太阳风动压、行星际磁场、地壳磁场以及太阳极紫外辐射等都是影响火星感应磁层边界位置的关键因素,因此它们也会影响火星弓激波的位型. 除此以外,磁声波马赫数对火星弓激波的影响也不可忽略. 而对于金星弓激波而言,磁声波马赫数是主要控制因素. 基于上述参数影响的结果,科学家们建立了相关边界模型. 本文总结了目前金星和火星弓激波和磁堆积边界模型研究进展,为行星科学研究以及深空探测任务提供参考.

     

    Abstract: Although Venus and Mars do not have a global magnetic field but have atmospheres and ionospheres. During their coupling with the solar wind, the induced magnetospheres are created, as well as the boundaries of the bow shock and the magnetic pileup boundary. These boundaries not only reflect the upstream solar wind conditions but also reveal the state of the planetary space environment. Hence, on the one hand, the modeling of these boundaries can help to understand the basic process of solar wind-planet space interaction. On the other hand, these boundary models can also provide more accurate data on the location of the boundaries for planetary exploration and lay a theoretical foundation for China's "Tianwen-1" program and the corresponding deep space explorations. In addition, these boundary model studies also give important insights into the evolution and development of Earth-like planets. It is shown that the dynamic pressure of the solar wind, the interplanetary magnetic field, the crustal magnetic field, and the solar extreme ultraviolet radiation are all key factors affecting the location of the Martian magnetic pileup boundary, and thus they also affect the shape and size of the Martian bow shock. In addition, the effect of magnetosonic Mach number on the Martian bow shock cannot be neglected. As for the Venusian bow shock, the magnetosonic Mach number is the main controlling factor. Based on the results of the influence of the above parameters, scientists have established relevant boundary models. In this paper, we review the research progress on the Venusian and Martian bow shock and magnetic pileup boundary models, providing reference for planetary science research and deep space exploration.

     

/

返回文章
返回