Exploring the Gamma-ray emission from Galaxy Clusters

18-22 November 2024

Galaxy clusters are expected to be both dark matter (DM) and cosmic ray proton (CRp) reservoirs that accumulate along the formation of the clusters. Consequently, clusters are among the most promising astrophysical targets to search for γ-ray signals from DM annihilation/decay, but they are also predicted to be sources of large-scale γ-ray emission due to hadronic interactions in the intracluster medium (ICM). The search for this γ-ray emission from galaxy clusters has been going on for over two decades, and according to the hints found in the latest analyses, we may be closer than ever to achieving the first robust detection.

The Team Research program focuses on improving theoretical cluster emission models and performing novel analyses, searching for diffuse γ-ray emission from local clusters. It is organized into two correlated projects. The first consists of analyzing the newest Fermi-LAT data in the direction of local clusters to look for emission from CRp origin. In the second project, we will explore the near future of very-high energy γ-rays and the CTA prospects for detection of γ-ray emission from a selected sample of local clusters. The main result of the projects will be either to provide the first detection of diffuse γ-ray signal in galaxy clusters or to put constraints of unprecedented sensitivity to CRp acceleration and transport models and to TeV DM particle models.


  • Judit Pérez-Romero (University of Nova Gorica)


  • TBA