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V510 Pup (IRAS 08005-2356) is a binary post-AGB system with a fast molecularoutflow that has been noted for its puzzling mixture of carbon- and oxygen-richfeatures in the optical and infrared. To explore this chemical dichotomy andrelate it to the kinematics of the source, we present an ACA spectral linesurvey detailing fourteen newly detected molecules in this pre-planetarynebula. The simultaneous presence of CN/C2H/HC3N and SO/SO2 support theprevious conclusion of mixed chemistry, and their line profiles indicate thatthe C- and O-rich material trace distinct velocity structures in the outflow.This evidence suggests that V510 Pup could harbor a dense O-rich central waistfrom an earlier stage of evolution, which persisted after a fast C-richmolecular outflow formed. By studying the gas phase composition of this uniquesource, we aim to reveal new insights into the interplay between dynamics andchemistry in rapidly evolving post-AGB systems.

Clues to PPN Chemical Evolution: The Unique Molecular Environment of V510 Pup