标题： JWST对阿贝尔2744中球状星团的测光 II：光度和颜色分布 显示英文标题

标题： JWST Photometry of Globular Clusters in Abell 2744. II: luminosity and color distributions

摘要： 利用詹姆斯韦伯太空望远镜（JWST）对红移为$z=0.308$的巨大星团阿贝尔 2744 进行深度成像，用于探索其丰富的球状星团（GCs）群体的特征，基于我们对该系统的初步调查（Harris & Reina-Campos 2023）。 我们使用超过$10,000$个球状星团在三个星等范围内的测光数据来构建球状星团亮度函数（GCLF）和颜色分布（CDF）。 这些结果现在具体考虑了相对于阿贝尔 2744 中主导引力势的五个巨型星系位置的测光不完整性。 估计阿贝尔 2744 中的总球状星团数量为$N_{\rm GC} \geq 1.1 \times 10^5$，与它的高总质量一致。 我们还直接将观测到的分布与来自最近的 EMP-Pathfinder 模拟（Reina-Campos 等人 2022）中的球状星团群体理论预测进行比较，这些模拟是在与星团相同的 3.5 Gyr 回溯时间下观察到的。 模拟结果很好地匹配了观测结果，唯一的显著差异在于模拟预测在$z\simeq2$后形成的高金属丰度球状星团的数量比数据中看到的要多。 显示英文摘要

摘要： Deep JWST imaging of the giant galaxy cluster Abell 2744, at redshift $z=0.308$, is used to explore the features of its rich population of globular clusters (GCs), building on our initial survey of the system (Harris & Reina-Campos 2023). We use the photometry of more than $10,000$ GCs over a three-magnitude range to construct the GC luminosity function (GCLF) and color distribution (CDF). These results now specifically account for photometric incompleteness as a function of location relative to the five giant galaxies that dominate the gravitational potential of A2744. The total GC population in A2744 is estimated at $N_{\rm GC} \geq 1.1 \times 10^5$, consistent with its high total mass. We also directly compare the observed distributions with theoretical predictions for GC populations drawn from the recent EMP-Pathfinder simulations (Reina-Campos et al. 2022), viewed at the same 3.5 Gyr lookback time as the cluster. The simulations match the observations well, with the only notable disagreement being that the simulations predict larger numbers of GCs at high metallicity formed after $z\simeq2$ than are seen in the data.