Addari, Francesco (2020) The third dredge up in low- and intermediate-mass stars: sensitivity to mixing treatments and evolutionary effects. [Magistrali biennali]
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The thesis deals with the advanced evolution of low- and intermediate-mass stars (Mi < 8 Msun), with particular focus on the TP-AGB phase, when thermal pulses periodically take place in the interiors while strong stellar winds progressively erode the external mantle. This study, based on the MESA stellar evolution code, aims to investigate the effects of the third dredge up on the surface properties, i.e. chemical composition, effective temperature, and opacity. Different overshooting schemes and mass loss prescriptions were explored. At the same time, I tested the performance and characteristics of the code, a preliminary but necessary step for possible future developments of the research.
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