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AGB outflows as tests of chemical kinetics and radiative transfer models

Published online by Cambridge University Press:  12 October 2020

M. Van de Sande Open the ORCID record for M. Van de Sande [Opens in a new window] ,
T. Danilovich Open the ORCID record for T. Danilovich [Opens in a new window]  and
L. Decin
M. Van de Sande
Affiliation:
Department of Physics and Astronomy, Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
T. Danilovich
Affiliation:
Department of Physics and Astronomy, Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
L. Decin
Affiliation:
Department of Physics and Astronomy, Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium School of Chemistry, University of Leeds, Leeds LS2 9JT, UK email: [email protected]
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Abstract

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The outflows of asymptotic giant branch (AGB) stars are important astrochemical laboratories, rich in molecular material and host to various chemical processes, including dust formation. Since the different chemistries are relatively easily probed, AGB outflows are ideal testbeds within the wider astrochemical community. Recent observations are pushing the limits of both our current chemical models and radiative transfer routines. Current chemical models are restricted by the completeness of their chemical networks and the accuracy of the reaction rates. The molecular abundances retrieved by radiative transfer routines are strongly dependent on collisional rates, which are often not measured or calculated for molecules of interest. To further our understanding of the chemistry within the outflow, collaboration with the laboratory astrophysics community is essential. This collaboration is mutually beneficial, as it in turn provides new science questions for laboratory experiments and computations.

Keywords

astrochemistrymolecular processesstars: AGB and post-AGB starscircumstellar materialstars: mass loss
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 253 - 256
Copyright
© International Astronomical Union 2020

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