（子）恒星伴侣塑造了进化的星星的风

论文标题

（子）恒星伴侣塑造了进化的星星的风

(Sub)stellar companions shape the winds of evolved stars

论文作者

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

论文摘要

二元相互作用主导了大型恒星的演变，但是对于低和中间质量恒星而言，它们的作用尚不清楚。球形风从渐近巨型分支（AGB）恒星变成非球行星星云（PN）的演变可能是由于二进制相互作用引起的。我们观察到具有ATACAMA大毫米/亚毫米阵列（ALMA）的AGB恒星样品，发现它们的风显示出与行星星云（Play）（PNE）的形态相似性的独特非球形几何形状。我们推断出相同的物理学构成了AGB风和PNE。另外，形态和AGB质量损失率相关。这些特征可以通过二元相互作用来解释。我们提出了AGB形态的进化情况，该方案与AGB恒星和PNE中观察到的现象一致。

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.

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