标题： 球状星团中灾变变量的动态形成 显示英文标题

标题： Dynamical Formation of Cataclysmic Variables in Globular Clusters

摘要： 球状星团中X射线源的形成和演化可能受到星团内部动力学以及密集环境中恒星相互作用的影响。一些观测研究揭示了X射线源数量与恒星相遇率之间的相关性，并提供了动力学在X射线双星形成中作用的证据。 我们进行了蒙特卡洛模拟的调查，旨在探索灾变变量（CVs）的动力学和形成与这些天体数量、$N_{\rm cv}$和恒星相遇率、$\Gamma$之间观测到的相关性的起源之间的联系。我们的模拟结果显示，$N_{\rm cv}$和$\Gamma$之间存在与观测数据一致的相关性，展示了动力学所起的关键作用，并揭示了这一相关性背后的动力学历史。 在我们的模拟中，CVs 比质量接近主序星的单星更为集中于星团中心，尽管这种趋势对于由原始双星通过交换相互作用形成的 CVs 更强，这些 CVs 包含一个在未经历任何成分交换的双星形成的 CV 群体中不存在的更高质量 CV 的群体。 显示英文摘要

摘要： The formation and evolution of X-ray sources in globular clusters is likely to be affected by the cluster internal dynamics and the stellar interactions in the cluster dense environment.Several observational studies have revealed a correlation between the number of X-ray sources and the stellar encounter rate and provided evidence of the role of dynamics in the formation of X-ray binaries. We have performed a survey of Monte-Carlo simulations aimed at exploring the connection between the dynamics and formation of cataclysmic variables (CVs) and the origin of the observed correlation between the number of these objects, $N_{\rm cv}$, and the stellar encounter rate, $\Gamma$.The results of our simulations show a correlation between $N_{\rm cv}$ and $\Gamma$ as found in observational data, illustrate the essential role played by dynamics, and shed light on the dynamical history behind this correlation. CVs in our simulations are more centrally concentrated than single stars with masses close to those of turn-off stars, although this trend is stronger for CVs formed from primordial binaries undergoing exchange encounters, which include a population of more massive CVs absent in the group of CVs formed from binaries not suffering any component exchange.