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Presentation #406.05 in the session Exploring the MeV Gamma-ray Sky: The Past, Present, and Future.
With its diffuse imaging capabilities and high spectral resolution, COSI will provide key insights into the origin of Galactic positrons. COSI will identify potential individual sources of positrons in the Galaxy, determine the scale height of the Galactic disk, study the annihilation mechanism, and investigate the energy at which positrons are created. In this presentation, I will overview the COSI science goals designed to further our understanding of positrons and the role they play in our Galaxy.