基于Fermi-LAT以及DAMPE的活动星系核伽玛射线探测研究

活动星系核的喷流是宇宙中最剧烈的现象之一，具有强的伽玛射线辐射能力。其伽玛射线辐射一方面对理解喷流的物理过程有着重要的意义，另一方面是探究宇宙演化及搜寻可能的暗物质粒子存在证据的有效探针。本项目旨在利用费米空间伽玛射线望远镜LAT探测器的数据和暗物质粒子探测卫星的数据开展以下三方面的研究。首先，本项目计划通过研究活动星系核的伽玛射线能谱中的精细结构来限制平谱射电类星体的伽玛射线辐射区域位置和类轴子模型。其次，本项目拟提出一个新的强子辐射模型来解释观测到的射电瓣伽玛射线辐射并进一步搜寻更多射电瓣伽玛射线辐射的观测证据，从而更好的理解河外伽玛射线背景的起源。最后，基于我们首例伽玛射线射电中间噪度类星体的探测，本项目计划进一步增加此类源的数目并搜寻可能的来自于射电宁静活动星系核的伽玛射线，进而深刻理解喷流的形成过程。

Jets in active galactic nuclei (AGNs) are among the most energetic phenomena in the universe and capable to generate significant γ-ray emissions. Their γ-ray emissions not only play an important role in understanding the physical processes in AGN jets, but also serve as a valid probe for evolution of the universe and hunting dark matter particles. This project is based on the γ-ray data observed by Fermi-LAT and DAMPE, including three parts. Firstly, investigations of fine structures in the AGN γ-ray spectra will be performed to constrain the location of γ-ray emission of flat spectrum radio quasars and the Axion-like particle models. Secondly, endeavors that include proposing a new hadronic radiation model together with searching further observational evidences for γ-ray emission of AGN radio lobe, are made to probe its radiation process and the impact on the origin of extragalactic γ-ray background. Finally, based on our first detection of the γ-ray radio intermediate quasar, this project is aiming to increase the number of such kind and hunt possible γ-ray emissions from the radio-quiet AGNs, shedding lights on the formation process of the AGN jets.