论文标题
3D流体力学调查对伴侣对AGB流出的形态和动力学的影响
3D hydrodynamical survey of the impact of a companion on the morphology and dynamics of AGB outflow
论文作者
论文摘要
通过使用高分辨率的Alma观测，在低质量进化的恒星的折叠信封中检测到类似于后AGB恒星和行星星云中观察到的复杂结构。这些与球形对称性的偏差被认为主要是由与伴侣恒星或行星的相互作用引起的。通过使用三维流体动力模拟，我们研究了二元伴侣对AGB流出的风形态和动力学的影响。我们通过使用分类参数在这些模拟中形成的风结构和形态进行分类，并使用二进制配置的特征参数构建。最后，我们得出的结论是，如果弹弓机制足够大，则伴侣通过弹弓机制改变了风膨胀速度。
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.
