The baseline composition of solar energetic particles
The baseline composition of solar energetic particles
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DOI：
10.1086/191000
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发表时间：
1985
影响因子：
8.7
通讯作者：
J. Meyer
中科院分区：
文献类型：
--
作者：
J. Meyer
我们分析了所有现有航天器在非/sup 3/He 富集事件期间对太阳高能粒子 (SEP) 的高度可变重元素组成的观测结果。所有数据都显示了始终存在的基本成分模式（称为“质量无偏基线”SEP 成分）的印记，该模式与光球成分的不同之处在于与第一电离势（FIP）相关的简单偏差。在每次特定的观察中，这种无质量偏差的基线成分都会被附加偏差所扭曲，而附加偏差始终是质量（或 Z）的单调函数。后一种偏差的幅度甚至符号因观察而异。首先，它似乎与元素之间 A/Z* 比率的差异有关（Z* = 平均有效电荷）。
We analyze all existing spacecraft observations of the highly variable heavy element composition of solar energetic particles (SEP) during non-/sup 3/He-rich events. All data show the imprint of an ever-present basic composition pattern (dubbed ''mass-unbiased baseline'' SEP composition) that differs from the photospheric composition by a simple bias related to first ionization potential (FIP). In each particular observation, this mass-unbiased baseline composition is being distorted by an additional bias, which is always a monotonic function of mass (or Z). This latter bias varies in amplitude and even sign from observation to observation. To first order, it seems related to differences in the A/Z* ratio between elements (Z* = mean effective charge).