Common envelope evolution, the key orbital tightening phase of the traditional formation channel for close binaries, is a multistage process that presents many challenges to the establishment of a fully descriptive, predictive theoretical framework. In an approach complementary to global 3D hydrodynamical modeling, we explore the range of applicability for a simplified drag formalism that incorporates the results of local hydrodynamic "wind tunnel" simulations into a semi-analytical framework in the treatment of the common envelope dynamical inspiral phase using a library of realistic giant branch stellar models across the low, intermediate, and high mass regimes. In terms of a small number of key dimensionless parameters, we characterize a wide range of common envelope events, revealing the broad range of applicability of the drag formalism as well its self-similar nature across mass regimes and ages. Limitations arising from global binary properties and local structural quantities are discussed together with the opportunity for a general prescriptive application for this formalism.

中文翻译：

---

普通包络风洞：现实恒星包络中的适用范围和自相似性

共同包络演化是紧密双星传统形成通道的关键轨道收紧阶段，是一个多阶段过程，对建立完全描述性、预测性的理论框架提出了许多挑战。在补充全球 3D 流体动力学建模的方法中，我们探索了简化阻力形式的适用范围，该形式将局部流体动力学“风洞”模拟的结果合并到一个半分析框架中，使用一个跨越低质量、中等质量和高质量范围的现实巨星分支模型库。就少数关键无量纲参数而言，我们表征了广泛的常见包络事件，揭示了阻力形式主义的广泛适用性及其跨大众政权和时代的自相似性。讨论了由全局二元属性和局部结构量引起的限制，以及这种形式主义的一般规定应用的机会。