(Sub-)stellar companions shape the winds of evolved stars

L Decin, M Montargès, Anita Richards, C A Gottlieb, W Homan, Iain Mcdonald, I El Mellah, T Danilovich, S H J Wallström, Albert Zijlstra, A Baudry, J Bolte, E Cannon, E De Beck, F De Ceuster, A de Koter, J De Ridder, Sandra Etoka, D Gobrecht, Malcolm GrayF Herpin, M Jeste, E Lagadec, P Kervella, T Khouri, K Menten, T J Millar, H S P Müller, J M C Plane, R Sahai, H Sana, M Van de Sande, L B F M Waters, K T Wong, J Yates

Research output: Contribution to journalArticlepeer-review


Binary interactions dominate the evolution of massive stars, but their role is less clear for low and intermediate mass stars. The evolution of a spherical wind from an Asymptotic Giant Branch (AGB) star into a non-spherical planetary nebula (PN) could be due to binary interactions. We observe a sample of AGB stars with the Atacama Large Millimeter/submillimeter Array (ALMA), finding that their winds exhibit distinct non-spherical geometries with morphological similarities to PNe. We infer that the same physics shapes both AGB winds and PNe. The morphology and AGB mass-loss rate are correlated. These characteristics can be explained by binary interaction. We propose an evolutionary scenario for AGB morphologies which is consistent with observed phenomena in AGB stars and PNe.
Original languageEnglish
Publication statusAccepted/In press - 21 Jul 2020


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