The unidentified TeV source MGRO J1908+06, with emission extending from hundreds of GeV to beyond 100 TeV, is one of the most intriguing sources in the Galactic plane. MGRO J1908+06 spatially associates with an IceCube hotspot of neutrino emission. Although the hotspot is not significant yet, this suggests a possible hadronic origin of the observed gamma-ray radiation. Here we describe a multiwavelength analysis on MGRO J1908+06 to determine its nature. We identify, for the first time, an extended GeV source as the counterpart of MGRO J1908 + 06, discovering possibly associated molecular clouds (MCs). The GeV spectrum shows two well-differentiated components: a soft spectral component below ∼10 GeV, and a hard one (Γ ∼ 1.6) above these energies. The lower-energy part is likely associated with the dense MCs surrounding the supernova remnant (SNR) G40.5−0.5, whereas the higher-energy component, which connects smoothly with the spectrum observed in TeV range, resembles the inverse Compton emission observed in relic pulsar wind nebulae. This simple scenario seems to describe the data satisfactorily, but raises questions about the interpretation of the emission at hundreds of TeV. In this scenario, no detectable neutrino flux would be expected.

身份不明的 TeV 源 MGRO J1908+06，其发射范围从数百 GeV 到 100 TeV 以上，是银河平面中最有趣的源之一。MGRO J1908+06 在空间上与中微子发射的冰立方热点有关。尽管该热点尚不显着，但这表明所观察到的伽马射线辐射可能存在强子起源。在这里，我们描述了对 MGRO J1908+06 的多波长分析，以确定其性质。我们首次确定了一个扩展的 GeV 源作为 MGRO J1908 + 06 的对应物，发现了可能相关的分子云 (MC)。GeV 光谱显示了两个差异很大的成分：低于 ~10 GeV 的软光谱成分和高于这些能量的硬光谱成分 (Γ ∼ 1.6)。低能量部分可能与围绕超新星遗迹 (SNR) G40.5-0.5 的致密 MC 相关，而与在 TeV 范围内观察到的光谱平滑连接的高能量部分类似于在遗迹脉冲星风星云。这个简单的场景似乎令人满意地描述了数据，但引发了关于数百 TeV 发射解释的问题。在这种情况下，预计不会出现可检测的中微子通量。