论文标题
与VST进行的Fornax深入调查。 ix。 FDS区域中源的目录，并进行了针对球状簇和背景星系的示例研究
The Fornax Deep Survey with VST. IX. The catalog of sources in the FDS area, with an example study for globular clusters and background galaxies
论文作者
论文摘要
本文延续了Fornax深度调查（FDS）的系列。在先前致力于扩展的Fornax群集成员的研究之后，我们介绍了Fornax群集中紧凑型恒星系统的目录以及扩展的背景源和类似点状的来源。我们在$ \ sim $ \ sim $ 21平方$ 21平方的FDS区域中得出了约170万源的UGRI光度法。对于$ \ sim $ 27平方米的更广阔的区域，朝NGC1316的方向扩展，我们为约310万源提供GRI数据。为了提高来源的形态表征，我们通过将GRI波段单一暴露与FWHM <= 0.9 arcsec的切口相结合，从而生成多波段图像堆栈。我们将多波段堆栈用作检测框。紧凑源来源的识别是从光度和形态学选择标准的组合获得的，作为参考文献具有明确定义的分类源的特性。我们提出了Fornax地区球状簇（GC）分布的初步分析。该研究证实并扩大了先前的结果。我们观察到GC的半乳酸间种群是以NGC1399为中心的主要蓝GC人群，扩展了$ \ sim $ 0.9MPC，椭圆度$ \ sim $ 0.65。几个子结构沿着各个方向扩展了$ \ sim $ 0.5MPC。这些结构中的两个没有跨越任何明亮的星系。其中一个似乎连接到NGC1404，这是一个靠近聚类核心，尤其是GC较差的明亮星系。使用GRI目录，我们分析了扩展的FDS区域上的GC分布，并且找不到任何明显的GC子结构桥接两个最明亮的群集星系，即NGC1316和NGC1399。尽管NGC1316在光频段中的NGC1399较轻两倍，但与NGC1316相比，NGC1399周围的GC较高的GC人群估计为3-4倍，而40个Arcmin的半偏距
This paper continues the series of the Fornax Deep Survey (FDS). Following the previous studies dedicated to extended Fornax cluster members, we present the catalogs of compact stellar systems in the Fornax cluster as well as extended background sources and point-like sources. We derive ugri photometry of ~1.7 million sources over the $\sim$21 sq. degree area of FDS centered on NGC1399. For a wider area, of $\sim$27 sq. degs extending in the direction of NGC1316, we provide gri data for ~3.1 million sources. To improve the morphological characterization of sources we generate multi-band image stacks by coadding the best seeing gri-band single exposures with a cut at FWHM<=0.9 arcsec. We use the multi-band stacks as detection frames. The identification of compact sources is obtained from a combination of photometric and morphometric selection criteria taking as reference the properties of sources with well-defined classification from the literature. We present a preliminary analysis of globular cluster (GC) distributions in the Fornax area. The study confirms and extends further previous results. We observe the inter-galactic population of GCs, a population of mainly blue GCs centered on NGC1399, extends over $\sim$0.9Mpc, with an ellipticity $\sim$0.65. Several sub-structures extend over $\sim$0.5Mpc along various directions. Two of these structures do not cross any bright galaxy; one of them appears to be connected to NGC1404, a bright galaxy close to the cluster core and particularly poor of GCs. Using the gri catalogs we analyze the GC distribution over the extended FDS area, and do not find any obvious GC sub-structure bridging the two brightest cluster galaxies, NGC1316 and NGC1399. Although NGC1316 is twice brighter of NGC1399 in optical bands we estimate a factor of 3-4 richer GC population around NGC1399 compared to NGC1316, out to galactocentric distances of 40 arcmin
