费米气泡是近十年来新发现的伽马射线结构，它主要由南北两个瓣构成，每个瓣宽40度、长50度。它被认为来自于银河系中心，因此相关研究将有助于我们理解银河系中心的活动。项目申请人拟利用DAMPE和Fermi-LAT的伽马射线数据研究费米气泡等弥散源。申请人将利用最新的宇宙线观测数据、星际介质分布和Galprop程序计算一组更准确的银河系弥散背景辐射模板，并用它拟合银盘附近的光子数据。基于此模板我们将分析DAMPE数据，获得费米气泡的能谱，这是第一个独立于Fermi-LAT的观测结果，它受宇宙线污染更小。项目申请人也将采用自适应模板技术，使用Fermi-LAT数据获得更准确的费米气泡的空间模板。我们将系统分析其中的两个瓣、茧和其他子结构的能谱。这些工作将有助于加深对费米气泡的理解，为判断其轻子起源或是强子起源提供有用信息。

Fermi Bubbles (FBs) are new structures detected in the gamma-ray band within the last decade. They mainly consist of two lobes, and each of them has a width of 40 degrees and a height of 50 degrees. Since they are thought to be originated from the Galactic center, further researches will help us understand how the activities in the Galactic center happen. The applicant will perform detailed analyses of FBs and related diffuse sources with the gamma-ray data observed by DAMPE and Fermi-LAT. Based on the up-to-date cosmic ray observations, the new results on the distribution of interstellar medium, and the latest version of Galprop code, we will make a series of Galactic diffuse emission models which are more physical and accurate than previous works, and then use them to fit the photons around the Galactic plane. Considering the new Galactic diffuse emission models, we are able to derive the spectrum of FBs with the DAMPE data. It is the first independent result from the Fermi-LAT one and is less affected by the cosmic ray contamination. The applicant will also use the adaptive template method in the Fermi-LAT data to generate a more accurate spatial template of FBs. We will analyze the spectra of two lobes, cocoon and other sub-structures in the FBs. All these works will improve our understanding of the FBs and may provide useful information on their origin.