ON THE REMOTE DETECTION OF SUPRATHERMAL IONS IN THE SOLAR CORONA AND THEIR ROLE AS SEEDS FOR SOLAR ENERGETIC PARTICLE PRODUCTION
ON THE REMOTE DETECTION OF SUPRATHERMAL IONS IN THE SOLAR CORONA AND THEIR ROLE AS SEEDS FOR SOLAR ENERGETIC PARTICLE PRODUCTION
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DOI：
10.1088/0004-637x/770/1/73
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发表时间：
2013-06-10
影响因子：
4.9
通讯作者：
Tylka, Allan J.
中科院分区：
文献类型：
--
作者：
Laming, J. Martin;Moses, J. Daniel;Tylka, Allan J.
预测与快速日冕物质抛射（CME）驱动的冲击相关的大型太阳高能粒子（SEP）事件是空间天气领域的一个主要困难。除了与CME启动相关的问题之外，SEP强度难以预测，在任何给定的CME速度下跨越三个数量级。许多间接证据表明，注入加速过程的超热种子粒子是限制给定事件SEP强度的关键因素。本文概述了观测和理论基础的推断，一个超热粒子人口存在之前，大SEP事件，探讨了各种情况下产生种子粒子和他们的观测签名，并解释了如何可以通过测量H I Ly α线的翅膀，这样的超热检测。
Forecasting large solar energetic particle (SEP) events associated with shocks driven by fast coronal mass ejections (CMEs) poses a major difficulty in the field of space weather. Besides issues associated with CME initiation, the SEP intensities are difficult to predict, spanning three orders of magnitude at any given CME speed. Many lines of indirect evidence point to the pre-existence of suprathermal seed particles for injection into the acceleration process as a key ingredient limiting the SEP intensity of a given event. This paper outlines the observational and theoretical basis for the inference that a suprathermal particle population is present prior to large SEP events, explores various scenarios for generating seed particles and their observational signatures, and explains how such suprathermals could be detected through measuring the wings of the H I Ly alpha line.