The current recorded signals of ultrahigh-energy $\gamma$-rays may come from EeVatrons in the galaxy

Wei Zhu, Peng Liu, Zhiyi Cui +1

A hard $\gamma$-ray spectrum of supernova remnant G106.3+2.7 can be explained by using the hadronic model with the gluon condensation effect. This implies that not only PeVatrons but al…