论文标题
在公共包膜演化期间的对流和旋转：短期双白色矮人的形成
Convection and Spin-Up During Common Envelope Evolution: The Formation of Short-Period Double White Dwarfs
论文作者
论文摘要
双白矮人（DWD）的形成通道和预测的人群很重要，因为子集将演变为IA型超新星的重力波源和/或祖细胞。鉴于观察到的短期DWD的群体，我们计算包括对流效应时的共同包膜演化的结果。对于DWD系统中的每个观察到的白矮人，我们都会从全面的恒星进化模型套件中鉴定出所有具有等效原始WD核心质量的祖细胞。在第二个观察到的白矮人作为同伴的情况下，我们计算对流可以随着轨道衰变而释放的能量的条件，包括（如有必要）（如有必要），在公共包膜阶段，信封必须旋转多少。预测的后CE后最终分离密切跟踪观察到的DWD轨道参数空间，进一步增强了对流是公共包膜演化中的关键成分的观点。
The formation channels and predicted populations of double-white dwarfs (DWDs) are important because a subset will evolve to be gravitational-wave sources and/or progenitors of Type Ia supernovae. Given the observed population of short-period DWDs, we calculate the outcomes of common envelope evolution when convective effects are included. For each observed white dwarf in a DWD system, we identify all progenitor stars with an equivalent proto-WD core mass from a comprehensive suite of stellar evolution models. With the second observed white dwarf as the companion, we calculate the conditions under which convection can accommodate the energy released as the orbit decays, including (if necessary), how much the envelope must spin-up during the common envelope phase. The predicted post-CE final separations closely track the observed DWD orbital parameter space, further strengthening the view that convection is a key ingredient in common envelope evolution.
