Measurement and Implication of Diffuse Gamma-Ray Emission from the Galactic Plane at Ultra-High Energies

Explore the groundbreaking research on diffuse gamma-ray emission from the Galactic plane at ultra-high energies in this 57-minute conference talk. Delve into the analysis of data collected by the Large High Altitude Air Shower Observatory's (LHAASO) square kilometer array, focusing on energies ranging from 10 TeV to 1 PeV. Learn about the masking techniques used to exclude known γ-ray sources and discover the power-law function descriptions of diffuse emission spectra in inner and outer Galactic regions. Examine the discrepancies between measured fluxes and predictions based on hadronic products, local cosmic ray fluxes, and line-of-sight gas content. Consider potential explanations for these observations, including the possibility of unresolved, low surface brightness sources or the need for more complex Galactic cosmic ray propagation models. Gain insights into cutting-edge astrophysics research and its implications for our understanding of the Galaxy's high-energy phenomena.