ELECTRON AND PROTON ACCELERATION DURING THE FIRST GROUND LEVEL ENHANCEMENT EVENT OF SOLAR CYCLE 24
文献类型：期刊论文
| 作者 | Li, C.1,2; Firoz, Kazi A.3; Sun, L. P.1; Miroshnichenko, L. I.4,5 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2013-06-10 |
| 卷号 | 770期号:1页码:30PP |
| 关键词 | acceleration of particles magnetic fields Sun: coronal mass ejections (CMEs) Sun: flares |
| ISSN号 | 0004-637X |
| 通讯作者 | Li, C (reprint author), Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China. Email: lic@nju.edu.cn |
| 英文摘要 | High-energy particles were recorded by near-Earth spacecraft and ground-based neutron monitors (NMs) on 2012 May 17. This event was the first ground level enhancement (GLE) of solar cycle 24. In this study, we try to identify the acceleration source(s) of solar energetic particles by combining in situ particle measurements from the WIND/3DP, GOES 13, and solar cosmic rays registered by several NMs, as well as remote-sensing solar observations from SDO/AIA, SOHO/LASCO, and RHESSI. We derive the interplanetary magnetic field (IMF) path length (1.25 +/- 0.05 AU) and solar particle release time (01: 29 +/- 00: 01 UT) of the first arriving electrons by using their velocity dispersion and taking into account contamination effects. We found that the electron impulsive injection phase, indicated by the dramatic change in the spectral index, is consistent with flare non-thermal emission and type III radio bursts. Based on the potential field source surface concept, modeling of the open-field lines rooted in the active region has been performed to provide escape channels for flare-accelerated electrons. Meanwhile, relativistic protons are found to be released similar to 10 minutes later than the electrons, assuming their scatter-free travel along the same IMF path length. Combining multi-wavelength imaging data of the prominence eruption and coronal mass ejection (CME), we obtain evidence that GLE protons, with an estimated kinetic energy of similar to 1.12 GeV, are probably accelerated by the CME-driven shock when it travels to similar to 3.07 solar radii. The time-of-maximum spectrum of protons is typical for shock wave acceleration. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | CORONAL MASS EJECTION ; ENERGETIC PARTICLE EVENTS ; POSSIBLE MECHANISMS ; MAGNETIC-FIELDS ; COSMIC-RAYS ; LARGE-ANGLE ; FLARES ; SHOCK ; SPECTRA ; HEIGHTS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000319986400034 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9870]  |
| 专题 | 紫金山天文台_太阳和太阳系等离子体研究团组 |
| 作者单位 | 1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China 4.Russian Acad Sci, NV Pushkov Inst Terr Magnetism Ionosphere & Radio, Troitsk 142190, Moscow Region, Russia 5.Moscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys SINP, Moscow 119234, Russia |
| 推荐引用方式 GB/T 7714 | Li, C.,Firoz, Kazi A.,Sun, L. P.,et al. ELECTRON AND PROTON ACCELERATION DURING THE FIRST GROUND LEVEL ENHANCEMENT EVENT OF SOLAR CYCLE 24[J]. ASTROPHYSICAL JOURNAL,2013,770(1):30PP. |
| APA | Li, C.,Firoz, Kazi A.,Sun, L. P.,&Miroshnichenko, L. I..(2013).ELECTRON AND PROTON ACCELERATION DURING THE FIRST GROUND LEVEL ENHANCEMENT EVENT OF SOLAR CYCLE 24.ASTROPHYSICAL JOURNAL,770(1),30PP. |
| MLA | Li, C.,et al."ELECTRON AND PROTON ACCELERATION DURING THE FIRST GROUND LEVEL ENHANCEMENT EVENT OF SOLAR CYCLE 24".ASTROPHYSICAL JOURNAL 770.1(2013):30PP. |
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来源：紫金山天文台
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