论文标题
估计三恒星系统中常见包膜演化的结果
Estimating the outcomes of common envelope evolution in triple stellar systems
论文作者
论文摘要
我们提出了一个新的模型，描述了三颗星的演变，该模型使用分析和数值技术的组合，该模型经历了共同的包膜演化。进化的早期阶段是由包膜动态摩擦驱动的，这会导致外部三重轨道比内二进制更快地收缩。在大多数情况下，这导致三颗星之间的混乱动力相互作用，最终导致了三个恒星从三重恒星弹出。残留二进制的这种射出和由此产生的后坐力足以从包膜上射出所有三个恒星，在恒星逃脱后，它会扩展和消散。这些结果对后通用包膜的特性有影响：它们可能仅在动态不稳定性开始之前弹出包膜的情况下存在，其可能性取决于初始二进制分离和包膜结构。如果三倍动态不稳定，则三倍无法生存，并且包膜在不形成行星星云的情况下消散。
We present a new model describing the evolution of triple stars which undergo common envelope evolution, using a combination of analytic and numerical techniques. The early stages of evolution are driven by dynamical friction with the envelope, which causes the outer triple orbit to shrink faster than the inner binary. In most cases, this leads to a chaotic dynamical interaction between the three stars, culminating in the ejection of one of the stars from the triple. This ejection and resulting recoil on the remnant binary are sufficient to eject all three stars from the envelope, which expands and dissipates after the stars have escaped. These results have implications for the properties of post-common envelope triples: they may only exist in cases where the envelope was ejected before the onset of dynamical instability, the likelihood of which depends on the initial binary separation and the envelope structure. In cases where the triple becomes dynamically unstable, the triple does not survive and the envelope dissipates without forming a planetary nebula.
