SEP时钟":大范围太阳高能粒子事件中第一质子到达时间的讨论

IF 2.7 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
A. Posner, I. G. Richardson, R. D.-T. Strauss
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引用次数: 0

摘要

这项工作分析了大范围deka-MeV太阳高能质子(SEP)事件的出现,特别是在地球-太阳L1测量到的≈ 4.5 - 45 MeV范围内的第一批质子的到来,以及它们与相对太阳源经度的关系。在本研究中,"大范围 SEP 事件 "的定义是指在太阳经度相距至少 130∘的近 1 AU 位置观测到 25 MeV 质子强度增加的事件。其中许多事件在所有三个航天器(STEREO(日地关系观测站)A、STEREO B 和 SOHO(太阳和日光层观测站))上都能观测到,因此可能远远超出太阳经度 130∘的范围。Richardson 等人的研究(《太阳物理学》,289,3059,2014 年)已经涉及了这些事件中的一大部分。事件源区域的识别借鉴了这项研究;同时还添加了更多最新事件。我们的重点是回答两个具体问题:(1) SEP质子显示能量分散的最大经度是多少,即高能质子先于低能质子到达的明显迹象? (2) 从观测到的事件集合中,可以得出哪些关于事件开始阶段冲击的直接磁连接和/或来自爆发地点的跨场传输的影响?
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The “SEP Clock”: A Discussion of First Proton Arrival Times in Wide-Spread Solar Energetic Particle Events

This work analyzes the appearance of wide-spread deka-MeV solar energetic proton (SEP) events, in particular the arrival of the first protons within ≈ 4.5 – 45 MeV measured at Earth–Sun L1, and their relationship with their relative solar source longitude. The definition of “wide-spread SEP event” for this study refers to events that are observed as a 25 MeV proton intensity increase at near 1 AU locations that are separated by at least 130 in solar longitude. Many of these events are seen at all three of the spacecraft, STEREO (Solar-Terrestrial Relations Observatory) A, STEREO B, and SOHO (Solar and Heliospheric Observatory), and may therefore extend far beyond 130 in longitude around the Sun. A large subset of these events have already been part of a study by Richardson et al. (Solar Phys., 289, 3059, 2014). The event source region identifications draw from this study; more recent events have also been added. Our focus is on answering two specific questions: (1) What is the maximum longitude over which SEP protons show energy dispersion, i.e., a clear sign of arrival of higher-energy protons before those of lower energy? (2) What implications can be drawn from the ensemble of events observed regarding either direct magnetic connectivity to shocks and/or cross-field transport from the site of the eruption in the onset phase of the event?

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来源期刊
Solar Physics
Solar Physics 地学天文-天文与天体物理
CiteScore
5.10
自引率
17.90%
发文量
146
审稿时长
1 months
期刊介绍: Solar Physics was founded in 1967 and is the principal journal for the publication of the results of fundamental research on the Sun. The journal treats all aspects of solar physics, ranging from the internal structure of the Sun and its evolution to the outer corona and solar wind in interplanetary space. Papers on solar-terrestrial physics and on stellar research are also published when their results have a direct bearing on our understanding of the Sun.
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