Solar plasma density and spectrum of accelerated particles derived from the 2.223-mev line of a solar flare
文献类型：期刊论文
| 作者 | Troitskaia, E. V.; Gan, W. Q.; Kuzhevskij, B. M.; Miroshnichenko, L. I. |
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2007-05-01 |
| 卷号 | 242期号:1-2页码:87-99 |
| 关键词 | CHROMOSPHERIC FLARE TIME PROFILE NEUTRON MODELS ATMOSPHERE EMISSION RHESSI |
| ISSN号 | 0038-0938 |
| 英文摘要 | The time profile of the neutron capture line of 2.223 MeV for the flare of 16 December 1988 (its third peak) is analyzed. The enhancements of plasma density in the deep photospheric layers of the Sun under the flare region (an effect of density enhancement) have been deduced by the SINP calculation code. These enhancements are studied based on several modified models of the lower chromosphere, photosphere, and convection zone. Additionally, the case has been examined when the neutron source is placed at the top of the photosphere. The energy spectrum of accelerated particles (protons) is shown to evolve with time. Assuming a stochastic mechanism of acceleration and a Bessel function for the spectrum, we find the spectral index alpha T to increase from 0.005 to 0.1 during the decay phase of the burst; i.e., the proton spectrum becomes harder. Density enhancements found in the flare of 16 December 1988 are consistent with our previous results on the density enhancement effects deduced for two other flares, 6 November 1997 and 22 March 1991. It is suggested that density enhancements in the deep layers of the photosphere may be rather common features of powerful solar flares. |
| 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] | CHROMOSPHERIC FLARE ; TIME PROFILE ; NEUTRON ; MODELS ; ATMOSPHERE ; EMISSION ; RHESSI |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000248137000007 |
| 公开日期 | 2012-02-05 |
| 源URL | [http://159.226.72.40/handle/332002/2396]  |
| 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.Moscow MV Lomonosov State Univ, D V Skobeltsyn Inst Nucl Phys SINP, Moscow 119992, Russia 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 3.IZMIRAN, N V Pushkov Inst, Troitsk 142190, Moscow Region, Russia 4.Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City 04510, DF, Mexico |
| 推荐引用方式 GB/T 7714 | Troitskaia, E. V.,Gan, W. Q.,Kuzhevskij, B. M.,et al. Solar plasma density and spectrum of accelerated particles derived from the 2.223-mev line of a solar flare[J]. SOLAR PHYSICS,2007,242(1-2):87-99. |
| APA | Troitskaia, E. V.,Gan, W. Q.,Kuzhevskij, B. M.,&Miroshnichenko, L. I..(2007).Solar plasma density and spectrum of accelerated particles derived from the 2.223-mev line of a solar flare.SOLAR PHYSICS,242(1-2),87-99. |
| MLA | Troitskaia, E. V.,et al."Solar plasma density and spectrum of accelerated particles derived from the 2.223-mev line of a solar flare".SOLAR PHYSICS 242.1-2(2007):87-99. |
入库方式： OAI收割
来源：紫金山天文台
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