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arXiv 1208.3535astro-ph.SR
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与M1 .6临边耀斑有关的超拱廊结构的微波辐射

Microwave Emission of Supra-arcade Structure associated with M1.6 Limb Flare

Sujin Kim, Hazel Bain, Kiyoto Shibasaki, Veronika Reznikova

摘要:

我们研究了2010年11月4日发生在东南边缘的M1.6耀斑的超拱廊结构。它的微波观测是用Nobeyama射电日像仪(NoRH)在17 GHz,软X射线在8-20 keV的范围内,用Ramaty高能太阳光谱成像仪(RHESSI),和EUV大气成像组件(AIA)机载太阳动力学天文台(SDO)。根据Reeves & Golub(2011年)的报告,超拱廊结构主要在AIA 131 α通道中观察到,其中含有来自Fe XIX的热11 MK组分(Boerner等人,2011年)。当这种炽热的耀斑等离子体持续到耀斑的衰变阶段时,它在微波和软X射线方面表现出一些有趣的特征:1)在超拱廊结构中,微波辐射的亮温(TB)逐渐增加,最高可达2 \times 10 ^4 K; 2)出现两个软X射线源:一个与超拱廊结构同空间,另一个在耀斑后拱廊上方。我们推导出的变化的发射措施,密度和能量的超拱廊结构使用TB从17 GHz的微波观测。

英文摘要:

We have investigated a supra-arcade structure, associated with an M1.6 flare, which occurred on the south-east limb on 4th of November 2010. It is observed in microwaves at 17 GHz with the Nobeyama Radioheliograph (NoRH), soft X-rays in the range of 8-20 keV with the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI), and EUV with the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). As reported by Reeves & Golub (2011), the supra-arcade structure is observed predominantly in the AIA 131 Å channel, which contains a hot 11 MK component from Fe XIX (Boerner et al. 2011). While this hot flare plasma lasts over the decay phase of the flare, it shows some interesting characteristics in microwaves and soft X-rays: 1) In the supra-arcade structure, the brightness temperature (TB) of the microwave emission increases gradually up to 2\times10^4 K, and 2) two soft X-ray sources appear: one cospatial with the supra-arcade structure and another above the post-flare arcade. We have derived the variation of emission measure, density, and energy of the supra-arcade structure using the TB obtained from 17 GHz microwave observations.

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