Speaker
Description
Exploring cosmic ray sources and examining gamma radiation within the Galaxy are crucial to understanding astrophysical phenomena in cosmic dimensions. This investigation examines the participation of massive star clusters as emitters of high-energy gamma rays and their implications for the diffuse gamma radiation observed throughout the Galaxy. By employing proton injection, we explore how the acceleration of proton nuclei in massive stars contributes to the overall gamma radiation that is detectable on Earth. We examined two main types of clusters - extensive dispersed clusters and youthful compact massive clusters. Both types of host shocks are caused by supernova remnants (SNRs). We carefully identified clusters close to the solar system, within a radius of 2 kiloparsecs. We used analytical techniques to calculate energy spectra and gamma-ray production rates, ensuring up to 20% precision for energies greater than 100 GeV. The results of this study provide information about how massive star clusters contribute to high-energy gamma-ray emissions and can help to explain where the extra diffuse gamma radiation in the Galaxy comes from. These findings represent a step forward in high-energy astrophysics, improving our understanding of the complex processes that create gamma rays across the Galaxy.
