发表机构
Universidad de Antioquia; University of Glasgow; Universidade Estadual Paulista（安蒂奥基亚大学; 格拉斯哥大学; 圣保罗州立大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究GLADE+星系目录完备性对暗标准汽笛宇宙学的影响，发现加入较暗星系对大多数GWTC-3事件影响甚微，但显著影响定位良好的GW190814，凸显事件定位与目录深度的重要性。
AI 中文摘要
宇宙学参数可以通过暗标准汽笛（即没有电磁对应体的引力波事件）来估计，其方法是使用从星系目录中统计估计源红移的推断方法。我们研究了将不同视星等截断应用于GLADE+目录所产生的影响，分析了第三次LIGO-Virgo-KAGRA引力波暂现目录（GWTC-3）中的事件，其中包括42个双黑洞、3个中子星-黑洞系统以及与双中子星并合相关联的事件GW190425。我们发现，加入较暗星系对几乎所有事件的联合分析没有显著影响，而对于某些单独定位良好的事件，其影响可能更为重要，尤其是对事件GW190814。为了理解为何加入较暗星系总体上对宇宙学参数估计的影响可忽略不计，我们将事件的红移与较暗星系的红移分布进行比较，发现大多数较暗星系并不位于事件的红移邻近区域，这解释了其加入影响有限的原因。事件GW190814是一个例外，因为其距离定位（转换为红移后）与较暗星系重叠，而其他事件则距离更远，情况并非如此。这些结果表明，事件定位和目录深度在决定目录完备性对宇宙学参数估计影响中的重要性。为了定量检验加入较暗星系所获得的信息，我们分析了其对视线先验计算的影响。基于GW190814的结果，我们预期当更深的目录可用时，较暗星系在多个事件的联合分析中也将在宇宙学参数估计中发挥更显著的作用。
英文摘要
Cosmological parameters can be estimated from dark sirens, gravitational waves events without electromagnetic counterpart, by using inference methods which estimate statistically the source redshift from galaxy catalogs. We study the effects of applying different apparent magnitude cuts to the GLADE+ catalog, analyzing events from the third LIGO-Virgo-KAGRA gravitational wave transient catalog (GWTC-3), consisting of 42 binary black holes, 3 neutron star black hole systems and the event GW190425 associated to a binary neutron star coalescence. We find that the inclusion of fainter galaxies has no significant effects on the joint analysis of almost all the events, while for some single well localized event, the effects can be more important, in particular for the event GW190814. To understand why inclusion of fainter galaxies in general has negligible impact on the estimation of cosmological parameters, we compare the redshift of the events with the redshift distribution of dimmer galaxies, and find that most of them are not located in redshift proximity of the events, explaining the limited impact of their inclusion. The event, GW190814 is an exception, as its distance localization, converted into redshift, overlaps with fainter galaxies, unlike what happens for other events, which are farther away. These results show the importance of event localization and catalog depth in determining the impact of catalog completeness on cosmological parameters estimation. To check quantitatively what is the information gained by adding fainter galaxies we have analyzed its impact on the line of sight prior calculation. Based on the results for GW190814 we expect that fainter galaxies will play a more significant role in the estimation of cosmological parameters also for the joint analysis of multiple events, when deeper catalogs will be available.
