PMO OpenIR  > 太阳和太阳系等离子体研究团组
ELECTRON AND PROTON ACCELERATION DURING THE FIRST GROUND LEVEL ENHANCEMENT EVENT OF SOLAR CYCLE 24
Li, C.1,2; Firoz, Kazi A.3; Sun, L. P.1; Miroshnichenko, L. I.4,5
2013-06-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume770Issue:1Pages:30PP
Corresponding AuthorLi, C (reprint author), Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China. Email: lic@nju.edu.cn
AbstractHigh-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.
KeywordAcceleration Of Particles Magnetic Fields Sun: Coronal Mass Ejections (Cmes) Sun: Flares
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/770/1/34
WOS KeywordCORONAL MASS EJECTION ; ENERGETIC PARTICLE EVENTS ; POSSIBLE MECHANISMS ; MAGNETIC-FIELDS ; COSMIC-RAYS ; LARGE-ANGLE ; FLARES ; SHOCK ; SPECTRA ; HEIGHTS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000319986400034
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9870
Collection太阳和太阳系等离子体研究团组
Affiliation1.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
Recommended Citation
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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