论文标题
SNR G344.7-0.1的西边缘揭示了伽马射线的发射
Gamma-ray emission revealed at the western edge of SNR G344.7-0.1
论文作者
论文摘要
我们报告了对非常高能量（VHE）的调查，最近使用Fermi Gamma-ray空间望远镜上的大面积望远镜（LAT）在50GEV上发现了银河系伽马射线源。该对象是2FHL J1703.4-4145，在2FHL目录中显示了具有光子指数〜1.2的非常硬> 50GEV频谱，因此，是银河系对象的2FHL子样品中最极端的来源之一。对可用多波长数据的详细分析表明，此源位于超新星残留物（SNR）G344.7--0.1的西部边缘，以及扩展的TEV源Hess J1702-420。观测和光谱分布建模支持这种伽马射线源的情况是SNR冲击与周围密集的介质之间相互作用的副产品，并且逃逸的宇宙射线（CRS）扩散到密集的环境中，并与大的局部云相互作用，从而产生了观察到的Tev Tev发射。如果得到证实，SNR CRS与附近的云之间的相互作用将使2FHL J1703.4-4145另一个有前途的有前途的候选者，以有效地粒子加速了2FHL银河系样品，这是我们先前对VELA SNR西边缘发生的可能令人震惊的相互作用的首次研究。
We report on the investigation of a very high energy (VHE), Galactic gamma-ray source recently discovered at >50GeV using the Large Area Telescope (LAT) on board the Fermi Gamma-Ray Space Telescope. This object, 2FHL J1703.4-4145, displays a very hard >50GeV spectrum with a photon index ~1.2 in the 2FHL catalog and, as such, is one of the most extreme sources in the 2FHL sub-sample of Galactic objects. A detailed analysis of the available multi-wavelength data shows that this source is located on the western edge of the supernova remnant (SNR) G344.7--0.1, along with extended TeV source, HESS J1702-420. The observations and the spectral energy distribution modeling support a scenario where this gamma-ray source is the byproduct of the interaction between the SNR shock and the dense surrounding medium, with escaping cosmic rays (CRs) diffusing into the dense environment and interacting with a large local cloud, generating the observed TeV emission. If confirmed, an interaction between the SNR CRs and a nearby cloud would make 2FHL J1703.4-4145 another promising candidate for efficient particle acceleration of the 2FHL Galactic sample, following the first candidate from our previous investigation of a likely shock-cloud interaction occurring on the West edge of the Vela SNR.
