论文标题
吹笛者的调查：I。初始观察珀尔修斯群集中的层状球体簇种群
The PIPER Survey: I. An Initial Look at the Intergalactic Globular Cluster Population in the Perseus Cluster
论文作者
论文摘要
我们描述了用于成像星系群（Piper）的目标的目标和第一个结果。该程序的第一阶段建立在使用哈勃太空望远镜（HST）ACS/WFC和WFC3/UVIS摄像机获得的磁场的成像上。带有HST的吹笛者目标场包括主要的早期型星系，包括活跃的中央巨型NGC 1275；已知的超扩散星系；和群内培养基。 F475W和F814W中产生的两色光度法达到足够深的深度，可以解决和测量珀尔修斯成员星系中的球状簇（GC）种群。在这里，我们提出了八对外场的初始结果，这些田地证实了距离珀尔修斯中心（群集的病毒半径的40 \％）的距离距离为740 kpc的田地中存在的近距离GCS（IGC）。这些IGC中约有90％是蓝色（金属贫困），但即使在这些非常遥远的距离处，也有明确的红色（金属富含）组件。
We describe the goals and first results of a Program for Imaging of the PERseus cluster of galaxies (PIPER). The first phase of the program builds on imaging of fields obtained with the Hubble Space Telescope (HST) ACS/WFC and WFC3/UVIS cameras. Our PIPER target fields with HST include major early-type galaxies including the active central giant NGC 1275; known Ultra-Diffuse Galaxies; and the Intracluster Medium. The resulting two-color photometry in F475W and F814W reaches deep enough to resolve and measure the globular cluster (GC) populations in the Perseus member galaxies. Here we present initial results for eight pairs of outer fields that confirm the presence of Intergalactic GCs (IGCs) in fields as distant as 740 kpc from the Perseus center (40\% of the virial radius of the cluster). Roughly 90% of these IGCs are identifiably blue (metal-poor) but there is a clear trace of a red (metal-rich) component as well, even at these very remote distances.
