Particle acceleration and gamma rays in solar flares: Recent observations and new modeling
文献类型：期刊论文
| 作者 | Miroshnichenko, L. I.1,2; Gan, W. Q.3 |
| 刊名 | ADVANCES IN SPACE RESEARCH
 |
| 出版日期 | 2012-09-15 |
| 卷号 | 50期号:6页码:736-756 |
| 关键词 | Sun: atmosphere density, solar flares Particle acceleration: source location, energy spectrum Gamma rays: annihilation, de-excitation lines, neutron capture line, pion decay emission |
| ISSN号 | 0273-1177 |
| 英文摘要 | Experiments 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| 研究领域[WOS] | Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences |
| 关键词[WOS] | ENERGY NEUTRAL RADIATION ; 28 OCTOBER 2003 ; 2.223 MEV LINE ; 1991 JUNE 4 ; MAGNETIC LOOPS ; DEEXCITATION LINES ; PLASMA-DENSITY ; TIME PROFILE ; CORONAS-F ; X-RAY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000307687700013 |
| 公开日期 | 2013-01-31 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/8031]  |
| 专题 | 紫金山天文台_太阳高能及相关物理过程研究团组 |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：紫金山天文台
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