标题： 第一双中子星合并的家系和起源的端到端研究 显示英文标题

标题： End-to-end study of the home and genealogy of the first binary neutron star merger

摘要： 双中子星并合是大质量双星演化中的终极事件之一，我们对它们的母系统了解仍然处于初级阶段。 即将到来的引力波探测结果，结合多波段后续观测，将使我们能够通过表征其邻近恒星种群并寻找其前身星来研究越来越多的此类事件。 恒星演化模拟对于这项工作至关重要，但它们也基于许多假设。 此外，用于研究宿主星系的模型与用于表征前身星的模型不同，通常基于单星种群。 在这里，我们引入了一个框架来进行端到端分析，并将其应用于第一个双中子星并合事件——GW170817。 利用二进制种群和光谱合成（BPASS）代码，我们能够检索宿主星系NGC 4993的物理特性，并推断出前身星候选者。 在我们的模拟中，GW170817有超过98%的可能性起源于Z=0.010、诞生于5到12.5吉年之前的恒星种群。 通过仔细权衡恒星系谱，我们发现GW170817最可能来自一个主星质量为13-24 Msol、伴星质量为10-12 Msol的双星系统，在其生命周期中经历了两到三次共同包层事件。 显示英文摘要

摘要： Binary neutron star mergers are one of the ultimate events of massive binary star evolution, and our understanding of their parent system is still in its infancy. Upcoming gravitational wave detections, coupled with multi-wavelength follow-up observations, will allow us to study an increasing number of these events by characterising their neighbouring stellar populations and searching for their progenitors. Stellar evolution simulations are essential to this work but they are also based on numerous assumptions. Additionally, the models used to study the host galaxies differ from those used to characterise the progenitors and are typically based on single star populations. Here we introduce a framework to perform an end-to-end analysis and deploy it to the first binary neutron star merger - GW170817. With the Binary Population And Spectral Synthesis (BPASS) codes we are able to retrieve the physical properties of the host galaxy NGC 4993 as well as infer progenitor candidates. In our simulations there is a >98% chance that GW170817 originated from a stellar population with Z=0.010 born between 5 and 12.5 Gyrs ago. By carefully weighing the stellar genealogies we find that GW170817 most likely came from a binary system born with a 13-24 Msol primary and 10-12 Msol secondary which underwent two or three common envelope events over their lifetime.