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In this paper we model the evolution of pre‐planetary nebula (PPN) and planetary nebula (PN) morphologies as a function of nebular age. The aim of this work is to understand if shape transitions from one evolutionary phase to the other can be driven by changes in the parameters of the mass‐loss from the central star. We carry out 2.5D hydrodynamical simulations of mass‐loss at the end stages of stellar...
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