PMO OpenIR  > 太阳高能及相关物理过程研究团组
Particle acceleration and gamma rays in solar flares: Recent observations and new modeling
Miroshnichenko, L. I.1,2; Gan, W. Q.3
2012-09-15
Source PublicationADVANCES IN SPACE RESEARCH
ISSN0273-1177
Volume50Issue:6Pages:736-756
AbstractExperiments on SMM, GAMMA, Yohkoh, GRAN AT, Compton GRO, INTEGRAL, RHESSI and CORONAS-F satellites over the past three decades have provided copious data for fundamental research relating to particle acceleration, transport and energetics of flares and to the ambient abundance of the solar corona, chromosphere and photosphere. We summarize main results of solar gamma-astronomy (including some results of several joint Russian-Chinese projects) and try to appraise critically a real contribution of those results into modern understanding of solar flares, particle acceleration at the Sun and some properties of the solar atmosphere. Recent findings based on the RHESSI, INTEGRAL and CORONAS-F measurements (source locations, spectrum peculiarities, He-3 abundance etc.) are especially discussed. Some unusual features of extreme solar events (e.g., 28 October 2003 and 20 January 2005) have been found in gamma-ray production and generation of relativistic particles (solar cosmic rays, or SCR). A number of different plausible assumptions are considered concerning the details of underlying physical processes during large flares: (1) existence of a steeper distribution of surrounding medium density as compared to a standard astrophysical model (HSRA) for the solar atmosphere; (2) enhanced content of the He-3 isotope; (3) formation of magnetic trap with specific properties; (4) prevailing non-uniform (e.g., fan-like) velocity (angular) distributions of secondary neutrons, etc. It is emphasized that real progress in this field may be achieved only by combination of gamma-ray data in different energy ranges with multi-wave and energetic particle observations during the same event. We especially note several promising lines for the further studies: (1) resonant acceleration of the He-3 ions in the corona; (2) timing of the flare evolution by gamma-ray fluxes in energy range above 90 MeV; (3) separation of gamma-ray fluxes from different sources at/near the Sun (e.g., different acceleration sources/episodes during the same flare, contribution of energetic particles accelerated by the CME-driven shocks etc.); (4) asymmetric magnetic geometry and new magnetic topology models of the near-limb flares; (5) modeling of self-consistent time scenario of the event. (c) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.
KeywordSun: Atmosphere Density, Solar Flares Particle Acceleration: Source Location, Energy Spectrum Gamma Rays: Annihilation, De-excitation Lines, Neutron Capture Line, Pion Decay Emission
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.asr.2012.04.024
WOS KeywordENERGY NEUTRAL RADIATION ; 28 OCTOBER 2003 ; 2.223 MEV LINE ; 1991 JUNE 4 ; MAGNETIC LOOPS ; DEEXCITATION LINES ; PLASMA-DENSITY ; TIME PROFILE ; CORONAS-F ; X-RAY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
WOS SubjectAstronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS IDWOS:000307687700013
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8031
Collection太阳高能及相关物理过程研究团组
Affiliation1.Russian Acad Sci, NV Pushkov Inst Terr Magnetism Ionosphere & Radio, Troitsk 142190, Moscow Region, Russia
2.Moscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys SINP, Moscow 119991, Russia
3.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Miroshnichenko, L. I.,Gan, W. Q.. Particle acceleration and gamma rays in solar flares: Recent observations and new modeling[J]. ADVANCES IN SPACE RESEARCH,2012,50(6):736-756.
APA Miroshnichenko, L. I.,&Gan, W. Q..(2012).Particle acceleration and gamma rays in solar flares: Recent observations and new modeling.ADVANCES IN SPACE RESEARCH,50(6),736-756.
MLA Miroshnichenko, L. I.,et al."Particle acceleration and gamma rays in solar flares: Recent observations and new modeling".ADVANCES IN SPACE RESEARCH 50.6(2012):736-756.
Files in This Item:
File Name/Size DocType Version Access License
2012009Particle acce(1275KB) 开放获取LicenseView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Miroshnichenko, L. I.]'s Articles
[Gan, W. Q.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Miroshnichenko, L. I.]'s Articles
[Gan, W. Q.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Miroshnichenko, L. I.]'s Articles
[Gan, W. Q.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2012009Particle acceleration and gamma rays in solar flares_ Recent observations and new modeling.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.