Wolstenholme-Hogg, A, James, AD orcid.org/0000-0003-0532-0065, Plane, JMC et al. (1 more author) (Cover date: November 2020) Chemistry on hot astrochemical dust surfaces: Sulfur in AGB outflows. Proceedings of the International Astronomical Union, 16 (S366). pp. 271-276. ISSN 1743-9213
Abstract
Astrochemical models treat dust surfaces as ice covered. We investigate the effects of implementing increased bare dust binding energies of CO and S-bearing species on the chemistry in the outflows of asymptotic giant branch (AGB) stars. We demonstrate the potential for improving agreement with observations in the outflow of IK Tau.
Increasing the binding energies to measured and computationally derived values in high mass-loss AGB outflows increased the production of daughter species. Switching from a high binding energy on bare dust to weaker binding to ice, the gas phase abundance increased at a radius in agreement with observations of IK Tau, suggesting that displacement of bound species could contribute to this observational puzzle. Using a strong binding to bare dust, a gas phase increase was not observed, however parent species concentrations had to be increased by around a factor of four to explain observed concentrations.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s), 2022. Published by Cambridge University Press on behalf of International Astronomical Union. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Surface Binding, Kinetics, AGB Outflows, Sulfur |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Physical Chemistry (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 22 Dec 2022 15:09 |
Last Modified: | 22 Dec 2022 15:09 |
Published Version: | http://dx.doi.org/10.1017/s1743921322001119 |
Status: | Published |
Publisher: | Cambridge University Press |
Identification Number: | 10.1017/s1743921322001119 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:194645 |
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