学术讲座公告---The induced global looping magnetic fields on Venus and Mars

  • 发布时间:[2019-11-07] 来源:[学院] 点击量:[1068]

报告时间:2019年11月13日(周三)上午10:00
报告地点:电子信息学院303会议室
报告题目:The induced global looping magnetic fields on Venus and Mars
报告人:柴立晖  中国科学院地质与地球物理研究所 副研究员

报告摘要:Venus and Mars have no significant intrinsic magnetic dipoles, they serve as the prototype of solar wind interaction with unmagnetized planetary bodies with atmospheres. The global magnetic field around them are believed to be formed by the draped interplanetary magnetic field (IMF). However, some of the observed large-scale magnetic fields are inconsistent with the draped field pattern.  Here we show that besides the draped fields, there is a second type of induced global magnetic fields on both Venus and Mars. These global looping fields have distributions in cylindrical shell around the magnetotail and counterclockwise directions looking from the planetary tails toward the Sun. The looping field is a common feature of unmagnetized planets with atmospheres. The observed solar wind flows along the azimuth direction towards the –E (conventional electrical field) hemisphere by MAVEN agrees with the looping field morphology and provides a possible cause for the looping field. The current system associated with the looping field and its possible connection with the nightside ionosphere formations and ion escapes on Mars and Venus are discussed.

报告人简介:
柴立晖,中国科学院地质与地球物理研究所副研究员。2008年本科毕业于中国科学技术大学地空学院,2013年获得中国科学技术大学空间物理博士学位。先后在德国马普太阳系研究所、德国布伦瑞克工业大学、美国加州大学洛杉矶分校和密歇根大学访学。主要研究方向为太阳风与行星的相互作用,结合卫星观测和全球三维混杂模拟研究了金星和火星的感应磁场,在火星、金星和土卫六等无磁有气星体上发现了共同存在的的全球性环形磁场结构。现已发表在国际SCI论文20余篇。

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