论文标题
SNR G106.3+2.7的Fermi-LAT观测值PEV质子加速度的证据
Evidence for PeV Proton Acceleration from Fermi-LAT Observations of SNR G106.3+2.7
论文作者
论文摘要
在宇宙射线频谱中，能量〜1 PEV的“膝盖”的存在表明存在称为“ Pevatrons”的银河PEV PEV质子加速器。 Supernova Remnant（SNR）G106.3+2.7是其中之一的主要候选人。最近从G106.3+2.7中检测到非常高的能量（0.1-100 TEV）伽马射线可以通过相对论电子的中性亲腐烂或反康普顿散射来解释。我们报告了对12年的费米 - 拉特伽玛射线数据的分析，该数据表明，GEV-TEV伽马射线频谱要困难得多，并且需要与无线电和X射线光谱不同的总电子能量，这表明它具有独特的，具有强化的HADRONOC来源。低于10 GEV的伽马射线的未检测意味着对相对论电子光谱的其他约束。强烈支持对观察到的伽玛射线的耐药解释。该观察结果证实了银河pevatrons和SNR之间的长期联系。此外，这表明G106.3+2.7可能是新的SNR人群中最聪明的成员，其伽马射线能量通量在TEV Energies处峰值。这样的人群可能会导致宇宙射线膝盖，并由未来的高能量伽马射线探测器揭示。
The existence of a "knee" at energy ~1 PeV in the cosmic-ray spectrum suggests the presence of Galactic PeV proton accelerators called "PeVatrons". Supernova Remnant (SNR) G106.3+2.7 is a prime candidate for one of these. The recent detection of very high energy (0.1-100 TeV) gamma rays from G106.3+2.7 may be explained either by the decay of neutral pions or inverse Compton scattering by relativistic electrons. We report an analysis of 12 years of Fermi-LAT gamma-ray data which shows that the GeV-TeV gamma-ray spectrum is much harder and requires a different total electron energy than the radio and X-ray spectra, suggesting it has a distinct, hadronic origin. The non-detection of gamma rays below 10 GeV implies additional constraints on the relativistic electron spectrum. A hadronic interpretation of the observed gamma rays is strongly supported. This observation confirms the long-sought connection between Galactic PeVatrons and SNRs. Moreover, it suggests that G106.3+2.7 could be the brightest member of a new population of SNRs whose gamma-ray energy flux peaks at TeV energies. Such a population may contribute to the cosmic-ray knee and be revealed by future very high energy gamma-ray detectors.
