3D hydrodynamical survey of the impact of a companion on the morphology and dynamics of AGB outflows. Issue Volume 16:Issue S366(2020) (November 2020)

• Record Type: Journal Article
• Authors: Malfait, Jolien; Maes, Silke; Homan, Ward; Bolte, Jan; Siess, Lionel; De Ceuster, Frederik; Decin, Leen
• Editors: Decin, Leen; Zijlstra, Albert; Gielen, Clio
• Is Part Of: Proceedings of the International Astronomical Union. Volume 16:Issue S366(2020)
• Page Start: 234
• Page End: 239
• Publication Date: 2020-11
• Subjects: Stars: AGB -- Stars: winds, outflows -- Hydrodynamics -- Methods: numerical; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921322000229
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: 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.