标题： 类星体对作为大尺度结构的示踪物 显示英文标题

标题： Quasar Pairs as Large--Scale Structure tracers

摘要： 类星体由于其高亮度和专门的调查，是高红移下大尺度星系分布的有效示踪者。 先前的研究表明，类星体表现出类似于丰富星系团的偏差，表明类星体对可能与更高密度环境相关，作为原星系团的代理。 在这项工作中，我们旨在通过在红移空间中识别它们来表征同一晕中的紧密类星体对。 我们分析了类星体对与类星体的交叉相关性以及以这些系统为中心的CMB衍生的引力透镜收敛剖面。 我们已经识别出红移范围从1.2到2.8的2777对类星体。 类星体对表现出相对光度的分布，与具有相同红移分布的随机对不同，表明这些系统中的类星体不同于孤立的类星体。 类星体对与类星体之间的交叉相关性比类星体的自相关函数幅度更大，表明这些系统更强烈地偏向于大尺度质量分布，并位于更高质量的晕中。 这进一步得到了类星体对的更高收敛CMB引力透镜剖面的支持，与具有相似红移分布的孤立类星体相比。 我们的结果表明，类星体对是当前星系团的合适前体，而孤立的类星体则与密度较低的环境相关。 显示英文摘要

摘要： Quasars are effective tracers of the large-scale distribution of galaxies at high redshift thanks to their high luminosity and dedicated surveys. Previous studies have shown that quasars exhibit a bias similar to that of rich groups, indicating that quasar pairs may be linked to higher density environments, serving as protocluster proxies. In this work, we aim to characterize close quasar pairs within the same halo by identifying them in redshift space. We analyze pair-quasar cross correlations and CMB-derived lensing convergence profiles centered in these systems. We have identified 2777 pairs of quasars in the redshift range from 1.2 to 2.8. Quasar pairs exhibit a distribution of relative luminosities that differs from that of random pairs with the same redshift distribution, indicating that quasars in these systems are distinct from isolated ones. The cross-correlation between pairs and quasars shows a larger amplitude than the auto-correlation function of quasars, suggesting these systems are more strongly biased toward the large-scale mass distribution and reside in more massive halos. This is further supported by higher convergence CMB lensing profiles of pairs compared to isolated quasars with a similar redshift distribution. Our results indicate that quasar pairs are suitable precursors to present-day clusters of galaxies, unlike isolated quasars, which are associated with less dense environments.