Gamma-ray diagnostics of Type Ia supernovae Predictions of observables from three-dimensional modeling

Received xxxx xx, xxxx / accepted xxxx xx, xxxx Context. Although the question of progenitor systems and detailed explosion mechanisms still remains a matter of discussion, it is commonly believed that Type Ia supernovae (SNe Ia) are production sites of large amounts of radioactive nuclei. Besides the fact that the gamma-ray emission due to radioactive decays is responsible for powering the light curves of SNe Ia, gamma rays themselves are of particular interest as a diagnostic tool because they provide a direct way to obtain deeper insights into the nucleosynthesis and the kinematics of these explosion events. Aims. We study the evolution of gamma-ray line and continuum emission of SNe Ia with the objective to analyze the relevance of observations in this energy range. We seek to investigate the chances for success of future MeV missions regarding their capabilities of constraining intrinsic properties and physical processes of SNe Ia. Methods. Focusing on two of the most broadly discussed SN Ia progenitor scenarios – a delayed detonation in a Chandrasekhar-mas