Fermi LAT detection of the supernova remnant SN1006 revisited: The southwest limb
Fermi LAT detection of the supernova remnant SN1006 revisited: The southwest limb
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费米 LAT 探测超新星遗迹 SN-1006 重访：西南缘
DOI：
10.1093/pasj/psz056
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发表时间：
2019
影响因子：
2.3
通讯作者：
Chen Yang
中科院分区：
文献类型：
--
作者：
Xing Yi;Wang Zhongxiang;Zhang Xiao;Chen Yang
费米伽玛射线空间望远镜上的大面积望远镜（LAT）的数据最近得到了更新。因此，我们重新分析了超新星遗迹SN 1006的LAT数据。该区域γ射线发射的两个部分被清晰地分辨出来，对应于信噪比的东北（NE）和西南（SW）分支。前者在以前的LAT数据中已经检测到（Xing et al., ApJ, 823,44），而后者在本工作中是新发现的。两个分支的检测结果在~ 4σ显著水平上，NE分支的光谱结果与之前的检测分析结果一致。我们构造了宽带频谱能量分布（SED）。考虑了其γ射线能量SED的不同情况。我们得出结论，在NE翼的情况下非常相似，SW翼的高能和高能发射可能由轻子过程主导，其中高能电子从信噪比逆康普顿的壳区加速，将背景光子散射到γ射线。
The data from the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have recently been updated. Thus we re-analyze the LAT data for the supernova remnant (SNR) SN 1006. Two parts of γ-ray emission from the region are clearly resolved, which correspond to the northeast (NE) and southwest (SW) limbs of the SNR. The former has been detected in the previous LAT data (Xing et al. , ApJ, 823, 44), but the latter is newly detected in this work. The detections of the two limbs are at a ∼4σ significance level, and the spectral results for the NE limb are consistent with those obtained in previous detection analyses. We construct the broadband spectral energy distribution (SED) for the SW limb. Different scenarios are considered for its SED in γ-ray energies. We conclude that, very similarly in the case of the NE limb, the high-energy and very high-energy emissions from the SW limb is likely dominated by the leptonic process, in which high-energy electrons accelerated from the shell region of the SNR inverse-Compton scatter background photons to γ-rays.