论文标题
从高银河纬度Calvera的SNR候选者中检测到扩展的$γ$ ray排放
Detection of the extended $γ$-ray emission from the high Galactic latitude Calvera's SNR candidate
论文作者
论文摘要
我们报告了扩展的GEV $γ$ ray排放，该排放与高银河纬度纬度残留物（SNR）候选人-Calvera的SNR具有空间相关，并带有{\ em fermi}大面积望远镜记录的PASS 8数据。 Calvera's SNR的$γ$射线频谱在100 MeV和1 TEV之间显示出几十万GEV的明显（$ \ sim $ 3.4 $σ$）的光谱曲率。多波长数据可以与Leptonic模型或HADRONIC模型一起拟合。但是，该模型在平坦的无线电频谱和Calvera的SNR的硬gev $γ$ -Ray频谱之间表现出不一致的。对于耐药模型，质子的光谱指数应比1.6难。质子的总能量比典型超新星的爆炸能量高一个数量级以上，这也挑战了耐药模型。 Calvera's SNR的明显光谱曲率和不存在非热X射线发射的原因使其成为一个有趣的来源，桥接了幼时的幼年SNR，具有明亮的非热X射线发射，并且与分子云相互作用的老年SNR。
We report the extended GeV $γ$-ray emission that spatially associated with the high Galactic latitude supernova remnant (SNR) candidate - Calvera's SNR with the Pass 8 data recorded by the {\em Fermi} Large Area Telescope. The $γ$-ray spectrum of Calvera's SNR between 100 MeV and 1 TeV shows an evident ($\sim$ 3.4$σ$) spectral curvature at several tens of GeV. The multi-wavelength data can be fitted with either a leptonic model or a hadronic one. However, the leptonic model exhibits the inconsistent between the flat radio spectrum and the hard GeV $γ$-ray spectrum of Calvera's SNR. For the hadronic model, the spectral index of protons should be harder than 1.6. And the total energy of protons is fitted to be more than one order of magnitude higher than the explosion energy of a typical supernova, which also challenges the hadronic model. The evident spectral curvature and the absence of non-thermal X-ray emission from Calvera's SNR makes it to be an interesting source bridging young-aged SNRs with bright non-thermal X-ray emission and old-aged SNRs interacting with molecular clouds.
