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INTERPLANETARY CORONAL MASS EJECTIONS BETWEEN 0.3 AND 30 AU: MULTI-SPACECRAFT OBSERVATIONS AND MODEL COMPARISONS

机译：0.3和30 Au之间的截止冠状质量射精：多空间的观测和模型比较

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摘要

Using observations from spacecraft such as Helios, PVO, ACE, Ulysses and Voyager 2 which are distributed throughout the heliosphere, we identify and characterize interplanetary coronal mass ejections (ICMEs) between 0.3 and 30 AU. An abnormally low proton temperature is used as the primary identification signature of ICMEs. The occurrence rate of ICMEs approximately follows the solar activity cycle. Statistically, the average radial width of ICMEs increases with distance up to about 15 AU, with a radial expansion speed of the order of the Alfven speed. The expansion features of the average temperature, density, and magnetic field magnitude of ICMEs are also studied. We employ a one-dimensional MHD numerical code to model the propagation of ICMEs to try to understand the observations. The model results reproduce the basic expansion characteristics of ICMEs.
机译：使用来自航天器的观测，如Helios，PVO，ACE，尤利西斯和Voyager 2，它们在整个角层中分布，我们识别并表征了0.3和30 Au之间的行星际冠状质量喷射（ICMES）。异常低的质子温度被用作ICMES的主要识别特征。 ICMES的发生率大致遵循太阳能活动周期。统计上，ICMES的平均径向宽度随距离高达约15AU的距离，具有径向膨胀速度的ALFven速度。还研究了ICMES的平均温度，密度和磁场大小的扩展特征。我们采用一维MHD数值代码来模拟ICMES的传播，以试图了解观察。模型结果再现了ICMES的基本扩张特征。

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