Fermi Detection of γ-Ray Emission from the M2 Soft X-Ray Flare on 2010 June 12
Fermi Detection of γ-Ray Emission from the M2 Soft X-Ray Flare on 2010 June 12
复制标题
2010 年 6 月 12 日 M2 软 X 射线耀斑 γ 射线发射的费米探测
DOI：
10.1088/0004-637x/745/2/144
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发表时间：
2012
影响因子：
4.9
通讯作者：
et al
中科院分区：
文献类型：
--
作者：
M.Ackermann;et al
对地静止运行环境卫星 (GOES) M2 级太阳耀斑，SOL2010-06-12T00: 57，在许多方面都很温和，但表现出高能粒子的显着加速。费米伽马射线爆发监视器和大面积望远镜实验观察到，耀斑产生了约 50 秒的硬 X 射线和 γ 射线脉冲发射，强度高达至少 400 MeV。非常相似的硬 X 射线和高能 γ 射线时间分布表明，大多数粒子在弱相对论性电子延迟约 10 秒的情况下被加速到能量≳ 300 MeV，但有些粒子在短短 3 秒内就达到了这些能量。该耀斑的 γ 射线线注量比通常从这种温和的 GOES 类 X 射线耀斑中观察到的γ射线线注量高出约 10 倍。没有证据表明存在超过 100 MeV 的延时发射，正如其他高能 γ 射线耀斑所发现的那样。
The Geostationary Operational Environmental Satellite (GOES) M2-class solar flare, SOL2010-06-12T00: 57, was modest in many respects yet exhibited remarkable acceleration of energetic particles. The flare produced an∼ 50 s impulsive burst of hard X-and γ-ray emission up to at least 400 MeV observed by the Fermi Gamma-ray Burst Monitor and Large Area Telescope experiments. The remarkably similar hard X-ray and high-energy γ-ray time profiles suggest that most of the particles were accelerated to energies≳ 300 MeV with a delay of∼ 10 s from mildly relativistic electrons, but some reached these energies in as little as∼ 3 s. The γ-ray line fluence from this flare was about 10 times higher than that typically observed from this modest GOES class of X-ray flare. There is no evidence for time-extended> 100 MeV emission as has been found for other flares with high-energy γ-rays.