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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Radial Evolution of Coronal Mass Ejections Between MESSENGER, Venus Express, STEREO, and L1: Catalog and Analysis
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Radial Evolution of Coronal Mass Ejections Between MESSENGER, Venus Express, STEREO, and L1: Catalog and Analysis

机译：径向进化之间的日冕物质抛射信使,金星快车、音响和L1:目录和分析

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摘要

Our knowledge of the properties of coronal mass ejections (CMEs) in the inner heliosphere is constrained by the relative lack of plasma observations between the Sun and 1 AU. In this work, we present a comprehensive catalog of 47 CMEs measured in situ measurements by two or more radially aligned spacecraft (MESSENGER, Venus Express, STEREO, Wind/ACE).We estimate the CME impact speeds at Mercury and Venus using a drag-based model and present an average propagation profile of CMEs (speed and deceleration/acceleration) in the inner heliosphere.We find that CME deceleration continues past Mercury's orbit but most of the deceleration occurs between the Sun and Mercury.We examine the exponential decrease of the maximum magnetic field strength in the CME with heliocentric distance using two approaches: a modified statistical method and analysis from individual conjunction events. Findings from both the approaches are on average consistent with previous studies but show significant event-to-event variability.We also find the expansion of the CME sheath to be well fit by a linear function. However, we observe the average sheath duration and its increase to be fairly independent of the initial CME speed, contradicting commonly held knowledge that slower CMEs drive larger sheaths. We also present an analysis of the 3 November 2011 CME observed in longitudinal conjunction between MESSENGER, Venus Express, and STEREO-B focusing on the expansion of the CME and its correlation with the exponential falloff of the maximum magnetic field strength in the ejecta.
机译：我们的知识的日冕物质的属性抛射(cme)的日球层受到等离子体的相对缺乏观察太阳和1之间。工作中,我们提出一个综合目录47岁cme测量由两个或两个以上的原位测量径向对齐航天器(信使,金星表达、音响、风/ ACE)。在水星和金星使用影响速度drag-based平均模型和礼物cme(速度和传播的状况减速/加速度)内日球层。但大多数继续过去的水星的轨道减速和太阳之间发生汞。芝加哥商品交易所的最大磁场强度与日心距离使用两种方法:修改后的统计方法和分析个人一起事件。平均的方法是一致的先前的研究表明显著event-to-event可变性。扩张的CME鞘很适合的线性函数。鞘及其持续时间增加相当独立的初始CME速度,矛盾普遍知识较慢cme驱动更大的鞘。2011年11月3日CME观测到的分析纵向连接之间的信使,金星表达,STEREO-B关注扩张芝加哥商品交易所及其相关的指数下降的最大磁场喷出物的强度。

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