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This is the fourth in a series of papers that deal with angular momentumtransport by internal gravity waves in stellar interiors. Here, we want toexamine the potential role of waves in other evolutionary phases than the mainsequence. We study the evolution of a 3Msun Population I model from thepre-main sequence to the early-AGB phase and examine whether waves can lead toangular momentum redistribution and/or element diffusion at the externalconvection zone boundary. We find that, although waves produced by the surfaceconvection zone can be ignored safely for such a star during the main sequence,it is not the case for later evolutionary stages. In particular, angularmomentum transport by internal waves could be quite important at the end of thesub-giant branch and during the early-AGB phase. Wave-induced mixing ofchemicals is expected during the early-AGB phase.

astronomy and astrophysics

Angular momentum transport by internal gravity waves. IV - Wave  generation by surface convection zone, from the pre-main sequence to the  early-AGB in intermediate mass stars