标题： 引力波谱合成 显示英文标题

标题： Gravitational wave spectral synthesis

摘要： 我们研究了孤立双星演化产生的LISA源，以及这些源如何依赖于年龄和金属丰度，使用了来自BPASS的模型恒星群体。我们将这些作为单龄群体建模，类似于星团。我们计算了这些模型星团内所有双星的合并引力波谱，包括各种类型的致密双星以及拥有存活恒星的双星。这些结果使我们能够评估星团用LISA探测的可能性。我们发现，在晚期主导的源是白矮星-白矮星双星，其强度比其他类型高50到200倍，但在$10^8$到$10^9$年的时间范围内，我们发现了一个显著数量的中子星-白矮星和黑洞-白矮星双星（每$10^6$M$_{\odot}$有2到40个），这与BPASS中质量转移和共有包层事件的处理有关，其中质量转移相对更有可能是稳定的。金属丰度也会影响引力波谱以及不同类型双星的相对优势。利用已知星团的信息将有助于识别LISA可能找到引力波源的天空位置。 显示英文摘要

摘要： We study the LISA sources that arise from isolated binary evolution, and how these depend on age and metallicity, using model stellar populations from BPASS. We model these as single-aged populations which are analogous to star clusters. We calculate the combined GW spectrum of all the binaries within these model clusters, including all types of compact binaries as well as those with living stars. These results allow us to evaluate the detectability of star clusters with LISA. We find at late times the dominant sources are WD-WD binaries by factors of 50-200, but at times between $10^8$ and $10^9$ years we find a significant population of NS-WD and BH-WD binaries (2-40 per $10^6$ M$_{\odot}$), which is related to the treatment of mass transfer and common envelope events in BPASS, wherein mass transfer is relatively likely to be stable. Metallicity also has an effect on the GW spectrum and on the relative dominance of different types of binaries. Using the information about known star clusters will aid the identification of sky locations where one could expect LISA to find GW sources.