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

par Malfait, Jolien;Maes, Silke;Homan, Ward;Bolte, Jan;Siess, Lionel ;De Ceuster, Frederik;Decin, Leen
Référence Proceedings of the International Astronomical Union, 16, page (234-239)
Publication Publié, 2020-11-01

Article révisé par les pairs

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Résumé :

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.