(Sub)stellar companions shape the winds of evolved stars
Abstract
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 nonspherical planetary nebula (PN) could be due to binary interactions. We observed a sample of AGB stars with the Atacama Large Millimeter/submillimeter Array (ALMA) and found that their winds exhibit distinct nonspherical geometries with morphological similarities to planetary nebulae (PNe). We infer that the same physics shapes both AGB winds and PNe; additionally, 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 that is consistent with observed phenomena in AGB stars and PNe.
Keywords
Cite
@article{arxiv.2009.11694,
title = {(Sub)stellar companions shape the winds of evolved stars},
author = {L. Decin and M. Montargès and A. M. S. Richards and C. A. Gottlieb and W. Homan and I. McDonald and I. El Mellah and T. Danilovich and S. H. J. Wallström and A. Zijlstra and A. Baudry and J. Bolte and E. Cannon and E. De Beck and F. De Ceuster and A. de Koter and J. De Ridder and S. Etoka and D. Gobrecht and M. Gray and F. Herpin and M. Jeste and E. Lagadec and P. Kervella and T. Khouri and K. Menten and T. J. Millar and H. S. P. Müller and J. M. C. Plane and R. Sahai and H. Sana and M. Van de Sande and L. B. F. M. Waters and K. T Wong and J. Yates},
journal= {arXiv preprint arXiv:2009.11694},
year = {2020}
}
Comments
19 pages main journal, 97 pages Supplementary Information