Molecular processes from the AGB to the PN stage

  title={Molecular processes from the AGB to the PN stage},
  author={Domingo An{\'i}bal Garc{\'i}a-Hern{\'a}ndez},
  journal={Proceedings of the International Astronomical Union},
  pages={148 - 155}
Abstract Many complex organic molecules and inorganic solid-state compounds have been observed in the circumstellar shell of stars (both C-rich and O-rich) in the transition phase between Asymptotic Giant Branch (AGB) stars and Planetary Nebulae (PNe). This short (~102-104 years) phase of stellar evolution represents a wonderful laboratory for astrochemistry and provides severe constraints on any model of gas-phase and solid-state chemistry. One of the major challenges of present day… 
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