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Galaxy Clusters to z ≤ 1 from the Oxford Dartmouth Thirty Degree Survey

机译:来自牛津达特尔茅斯30度调查的星系簇至z≤1

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The properties of galaxy clusters in the local universe have been fairly well determined in the past few decades, and wide field surveys in the near infrared are converging on a statistically significant sample of high redshift clusters. These catalogs may soon allow discrimination between the competing models of galaxy formation and evolution [1]. The Oxford-Dartmouth Thirty Degree Survey (ODT) will span four widely separated 3°* 3°fields, to B < 26 in UBVRi'Z with an extension in the near-infrared to K < 19. With more than half of the survey completed, this deep, wide-area, multi-color dataset has yielded a large samle of K-selected clusters to probe the formation and evolution history of galaxies in dense environments. An exploration of cluster colormagnitude slopes and intercepts [2], luminosity functions [3], and morphological distributions [4, 5] should constrain the relative dominance of star formation rates and merger events on cluster galaxy evolution. Here, we present our cluster-finding method and preliminary results.
机译:在过去的几十年里,本地宇宙中的星系集群的特性已经确定,近红外线的宽场调查在统计上显着的高闪光簇样品上会聚。这些目录可能很快允许竞争模型和进化的竞争模型[1]。牛津 - 达特茅斯30度调查(ODT)将跨越四个广泛分开的3°* 3°田地,到UBVri'z中的B <26,近红外延伸到K <19.超过一半的调查完成了,这种深度,广域,多色数据集已经产生了大量的K-SECTRION集群,以探讨致密环境中的星系的形成和演化历史。对群集聚类斜坡和截距[2],亮度函数[3]和形态分布的探索应限制星形成速率的相对优势和在簇星系进化上的合并事件。在这里,我们介绍了我们的聚类查找方法和初步结果。

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