平静时期太阳风中晕外电子的角分布规律
  • 【摘要】

    The angular distribution of superhalo electrons provides important information on the generation of superhalo electrons in the solar wind. Here we present a comprehensive study of the angular distribu... 展开>>The angular distribution of superhalo electrons provides important information on the generation of superhalo electrons in the solar wind. Here we present a comprehensive study of the angular distribution of~20-200keV superhalo electrons measured at1AU by the WIND3DP instrument during quiet times from1995January through2005December.For a given energy, we define the anisotropy of superhalo electrons(with respect to the interplanetary magnetic field)as A=2*(Jout+Jin)/(Jout-Jin),where Jout(Jin)is the observed differential flux of electrons traveling outward from(inward toward)the Sun. We found that for~96%of the selected quiet-time samples, superhalo electrons have isotropic angular distributions, while for~3%(~1%)of quiet-time samples, superhalo electrons have outward-anisotropic(inward-anisotropic)angular distributions. All three groups of superhalo electrons show no correlation with the local solar wind plasma, interplanetary magnetic field, turbulence, and energetic electrons accelerated/reflected at the terrestrial bow shock. 收起<<

  • 【作者】

    杨柳  王玲华  李刚  何建森  涂传诒 

  • 【作者单位】

    北京大学地球与空间科学学院

  • 【会议名称】

    2016中国地球科学联合学术年会

  • 【会议时间】

    2016-10-15

  • 【会议地点】

    北京

  • 【主办单位】

    中国地球物理学会   中国地质学会   中国地震学会   中国力学学会   中国岩石力学与工程学会

  • 【语种】

    chi

  • 【关键词】

    太阳风  晕外电子  角分布规律  平静时期