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首页> 外文期刊>The Astrophysical Journal. Supplement Series >A Catalog of Galaxies in the Direction of the Perseus Cluster
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A Catalog of Galaxies in the Direction of the Perseus Cluster

机译：珀斯群体方向的星系目录

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We present a catalog of 5437 morphologically classified sources in the direction of the Perseus galaxy cluster core, among them 496 early-type low-mass galaxy candidates. The catalog is primarily based on V-band imaging data acquired with the William Herschel Telescope, which we used to conduct automated source detection and derive photometry. We additionally reduced archival Subaru multiband imaging data in order to measure aperture colors and perform a morphological classification, benefiting from 0.''5 seeing conditions in the r-band data. Based on morphological and color properties, we extracted a sample of early-type low-mass galaxy candidates with absolute V-band magnitudes in the range of -10 to -20 mag. In the color-magnitude diagram, the galaxies are located where the red sequence for early-type cluster galaxies is expected, and they lie on the literature relation between absolute magnitude and Sersic index. We classified the early-type dwarf candidates into nucleated and nonnucleated galaxies. For the faint candidates, we found a trend of increasing nucleation fraction toward brighter luminosity or higher surface brightness, similar to what is observed in other nearby galaxy clusters. We morphologically classified the remaining sources as likely background elliptical galaxies, late-type galaxies, edge-on disk galaxies, and likely merging systems and discussed the expected contamination fraction through non-early-type cluster galaxies in the magnitude-size surface brightness parameter space. Our catalog reaches its 50% completeness limit at an absolute V-band luminosity of -12 mag and a V-band surface brightness of 26 mag arcsec(-2). This makes it the largest and deepest catalog with coherent coverage compared to previous imaging studies of the Perseus cluster.
机译：我们在Perseus Galaxy Cluster Core的方向上呈现了5437个形态学分类来源的目录，其中包括496型早期低质量星系候选者。目录主要基于与William Herschel望远镜获取的V波段成像数据，我们用于进行自动源检测和导出光度测量。我们还缩短了档案副库多频带成像数据，以便测量光圈颜色并执行形态分类，从0中受益于0.''5在R波段数据中看到条件。基于形态学和颜色性质，我们提取了在-10至-20mA的绝对V波段大小的早期低质量星系候选的样品。在颜色幅度图中，星系位于预期早期群体星系的红色序列的位置，它们位于绝对幅度和分层指数之间的文献关系。我们将早期矮人的候选人分为核和无核星系。对于微弱的候选人，我们发现一种趋势将成核分数朝向更亮的亮度或更高的表面亮度呈现，类似于其他附近的星系簇中观察到的内容。我们在形态学上分类了剩余的来源，可能是背景椭圆星系，后期的星系，边缘盘星系，以及可能的合并系统，并通过幅度亮度参数空间中的非早期簇星系讨论了预期的污染部分。我们的目录以-12mAG的绝对V波段光度达到其50％的完整性限制，以及26 mag arcsec（-2）的V波段表面亮度。与Perseus群集的先前成像研究相比，这使得它具有相干覆盖的最大和最深度的目录。

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