论文标题
进化恒星的折叠环境的3D模型：多个螺旋结构的形成
3D models of the circumstellar environments of evolved stars: Formation of multiple spiral structures
论文作者
论文摘要
我们介绍了3D流体动力学模型的相互作用之间的相互作用之间的相互作用之间的流出，脉动，渐近巨型分支（AGB）恒星和附近（$ <3 $ stellar Radii）子赛车伴侣（$ M _ {\ MATHRM {COMP}}}} \ LISTSIM 40 $ M $ _j $）。我们的模型表明，由于伴侣的轨道周期与AGB恒星的脉动周期之间的共振，因此可以形成多个螺旋结构。脉动驱动的冲击在不同地区遇到了由子策略伴侣的唤醒产生的密集材料时，会定期增强。我们讨论了这些螺旋结构的特性以及伴侣参数对它们的影响。我们还证明，附近同伴的重力可以增强AGB恒星的质量损失。对于更大的（$ M _ {\ Mathrm {comp}}> 40 $ m $ _j $）和更遥远的伴侣（$> 4 $ stellar radii），一种单个螺旋臂形式。我们讨论了与新一代高分辨率，高敏化工具一起观察这些结构的可能性，并使用它们将它们“在明亮的，进化的恒星周围”“找到”''''''子星伴侣。我们的结果还强调了当太阳变成AGB恒星时可能在太阳系中形成的可能结构。
We present 3D hydrodynamic models of the interaction between the outflows of evolved, pulsating, Asymptotic Giant Branch (AGB) stars and nearby ($< 3$ stellar radii) sub-stellar companions ($M_{\mathrm{comp}} \lesssim 40$ M$_J$). Our models show that due to resonances between the orbital period of the companion and the pulsation period of the AGB star, multiple spiral structures can form; the shocks driven by the pulsations are enhanced periodically in different regions as they encounter the denser material created by the sub-stellar companion's wake. We discuss the properties of these spiral structures and the effect of the companion parameters on them. We also demonstrate that the gravitational potential of the nearby companion enhances the mass loss from the AGB star. For more massive ($M_{\mathrm{comp}} > 40$ M$_J$) and more distant companions ($> 4$ stellar radii), a single spiral arm forms. We discuss the possibility of observing these structures with the new generations of high-resolution, high-sensitivity instruments, and using them to `find' sub-stellar companions around bright, evolved stars. Our results also highlight possible structures that could form in our solar system when the Sun turns into an AGB star.
