论文标题
Fornax群集星系的球状簇分布中的空间结构
Spatial Structures in the Globular Cluster Distribution of Fornax Cluster Galaxies
论文作者
论文摘要
我们报告了在FORNAX群集中最明亮的星系中，球状簇（GC）系统的预计二维分布中发现了具有统计学意义的空间结构。我们使用从哈勃太空望远镜（HST）高级相机提取的GC目录进行调查（ACS）FORNAX群集调查（ACSFCS）成像数据。我们表征了相对于GC结构的宿主星系的大小，形状和位置，并根据其形态和位置提出了一个暗示不同形成机制的分类。我们还相对于ForNax群集中星系星系和群内球体簇的一般空间分布的宿主星系位置进行了研究。我们最终估计了某些GC结构的祖细胞的动态质量，假设它们是宿主的卫星星系过去吸积事件的遗物。
We report the discovery of statistically significant spatial structures in the projected two-dimensional distributions of the Globular Cluster (GC) systems of 10 among the brightest galaxies in the Fornax Cluster. We use a catalog of GCs extracted from the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) Fornax Cluster Survey (ACSFCS) imaging data. We characterize the size, shape and location relative to the host galaxies of the GC structures and suggest a classification based on their morphology and location that is suggestive of different formation mechanisms. We also investigate the GC structures in the context of the positions of their host galaxies relative to the general spatial distributions of galaxies and intra-cluster globular clusters in the Fornax Cluster. We finally estimate the dynamical masses of the progenitors of some GC structures, under the assumption that they are the relics of past accretion events of satellite galaxies by their hosts.
