Top: schematic diagram showing an AGB star, the range of the DARWIN code (grey) and the outer boundary of the CO5BOLD code (orange). As the CO5BOLD models are star-in-a-box simulations, the computational box encases the full star. The region where the two modelling methods overlap is indicated in green. Bottom: physical processes taking place in different regions of the star. The pulsation of the stellar interior (red) triggers shockwaves in the lower atmosphere, where molecules form (green). The material is levitated to distances where dust can condense from the molecules (brown), which is radiatively accelerated outwards inducing a wind (yellow). The overlap region is again indicated in green.
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