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3D hydrodynamical survey of the impact of a companion on the morphology and dynamics of AGB outflows

Published online by Cambridge University Press:  30 November 2022

Jolien Malfait Open the ORCID record for Jolien Malfait [Opens in a new window] ,
Silke Maes Open the ORCID record for Silke Maes [Opens in a new window] ,
Ward Homan Open the ORCID record for Ward Homan [Opens in a new window] ,
Jan Bolte ,
Lionel Siess ,
Frederik De Ceuster  and
Leen Decin
Jolien Malfait
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Silke Maes
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Ward Homan
Affiliation:
Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles (ULB), CP 226, 1050 Brussels, Belgium
Jan Bolte
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
Lionel Siess
Affiliation:
Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles (ULB), CP 226, 1050 Brussels, Belgium
Frederik De Ceuster
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium Department of Physics and Astronomy, University College London, Gower Place, London, WC1E 6BT, United Kingdom
Leen Decin
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom email: jolien.malfait@kuleuven.be
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Abstract

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With the use of high-resolution ALMA observations, complex structures that resemble those observed in post-AGB stars and planetary nebulae are detected in the circumstellar envelopes of low-mass evolved stars. These deviations from spherical symmetry are believed to be caused primarily by the interaction with a companion star or planet. With the use of three-dimensional hydrodynamic simulations, we study the impact of a binary companion on the wind morphology and dynamics of an AGB outflow. We classifiy the wind structures and morphology that form in these simulations with the use of a classification parameter, constructed with characteristic parameters of the binary configuration. Finally we conclude that the companion alters the wind expansion velocity through the slingshot mechanism, if it is massive enough.

Keywords

Stars: AGBStars: winds, outflowsHydrodynamicsMethods: numerical
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S366: The Origin of Outflows in Evolved Stars , November 2020 , pp. 234 - 239
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Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of International Astronomical Union

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