Developing the Galactic diffuse emission model for the GLAST Large Area Telescope

Understand

Diffuse emission is produced in energetic cosmic ray (CR) interactions, mainly protons and electrons, with the interstellar gas and radiation field and contains the information about particle spectra in distant regions of the Galaxy.

• It may also contain information about exotic processes such as dark matter annihilation, black hole evaporation etc.
• A model of the diffuse emission is important for determination of the source positions and spectra.
• Calculation of the Galactic diffuse continuum gamma-ray emission requires a model for CR propagation as the first step.