与VST进行的天炉座深度勘测。IX。FDS区域的源目录，以及对球状星团和背景星系的实例研究
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
摘要：
本文是Fornax Deep Survey（FDS）系列的继续。在前人对天炉座星团扩展成员的研究基础上，我们给出了天炉座星团中致密恒星系统的星表以及扩展背景源和点状源。我们推导了$\sim$ 21平方米上~ 170万个源的ugri测光。以NGC 1399为中心的FDS的度区域。对于更宽的区域，$\sim$ 27平方米degs在NGC 1316方向延伸，我们提供了约310万个源的GRI数据。为了改善源的形态特征，我们通过将最佳看到的gri波段单次曝光与FWHM<=0.9 arcsec的切割相加来生成多波段图像堆栈。我们使用多波段堆栈作为检测帧。紧凑的源的识别是从光度和形态的选择标准的组合，作为参考的属性与定义明确的分类从文献来源。本文对球状星团在天炉座地区的分布作了初步分析。该研究证实并进一步扩展了以前的结果。我们观测到星系间的GC星族，主要是以NGC 1399为中心的蓝色GC星族，其范围超过$\sim$ 0.9Mpc，椭圆率$\sim$ 0.65。几个子结构沿不同方向在$\sim$ 0.5Mpc上延伸。其中两个结构没有穿过任何明亮的星系;其中一个似乎与NGC 1404相连，NGC 1404是一个靠近星团核心的明亮星系，特别缺乏GC。利用GRI星表，我们分析了扩展FDS区域的GC分布，并没有发现任何明显的GC子结构桥接的两个最明亮的星系团星系，NGC 1316和NGC 1399。虽然NGC 1316在光学波段比NGC 1399亮两倍，但我们估计，在40弧分的银河系中心距离外，NGC 1399周围的GC种群比NGC 1316丰富3-4倍
英文摘要：
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
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
