标题： 星际辐射场和宇宙微波背景辐射对LHAASO PeVatron的衰减 显示英文标题

标题： Attenuation of LHAASO PeVatrons by Interstellar Radiation Field and Cosmic Microwave Background Radiation

摘要： “PeVatrons”指能够将粒子加速到约$10^{15}$电子伏特及更高能量的天体物理源，并且可能对膝区附近的宇宙射线谱做出贡献。最近，LHAASO探测到了大量的PeVatrons，这使我们能够更深入地研究这些源在膝区以上对宇宙射线的贡献。 然而，高能伽马射线由于与星际辐射场和宇宙微波背景辐射相互作用而发生衰减，需要进行修正以恢复源的真实光谱特性。 在这项研究中，利用从galprop代码提取的星际辐射场模型，我们定量计算了第一个LHAASO源目录中列出的源的光谱吸收效应，一些源在100 TeV处的吸收达到了30%，在3 PeV处达到了80%。 我们还计算了银河系微类星体的高能伽马射线吸收效应，这些源可能是潜在的PeVatrons。 通过计算吸收效应，有助于区分加速源的辐射机制。 显示英文摘要

摘要： "PeVatrons" refer to astrophysical sources capable of accelerating particles to energies around $10^{15}$ electron volts and higher, potentially contributing to the cosmic ray spectrum in the knee region. Recently, LHAASO has discovered a large number of PeVatrons, allowing us to investigate in greater depth the contributions of these sources to cosmic rays above the knee region. However, high-energy gamma rays undergo attenuation due to interactions with the interstellar radiation field and cosmic microwave background radiation, requiring corrections to restore the true spectral characteristics at the source. In this study, using interstellar radiation field model extracted from galprop code, we quantitatively calculated the spectral absorption effects of sources listed in the first LHAASO source catalog, with some sources showing absorption reaching 30\% at 100 TeV and 80\% at 3 PeV. We also calculated the high energy gamma ray absorption effects of Galactic microquasars, which are potential PeVatrons. By calculating the absorption effects, it will help differentiate the radiation mechanisms of the acceleration sources.