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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Panoramic views of cluster-scale assemblies explored by subaru wide-field Imaging
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Panoramic views of cluster-scale assemblies explored by subaru wide-field Imaging

机译：斯巴鲁广角成像技术探索的集群规模装配体的全景视图

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摘要

We have started PISCES project; a panoramic imaging and spectroscopic survey of distant clusters on Subaru. It exploits the unique wide-field imaging capability of Suprime-Cam, which provides a 34' x 27' field of view corresponding to a physical area of 16 x 13 Mpc(2) at z ∼ 1. We plan to target 15 clusters at 0.4 ≲ z ≲ 1.3. We report on our first results concerning the inner structures and large-scale structures of two distant clusters at z = 0.55 and 0.83 together with the earlier results on a z = 0.41 cluster. The photometric redshift technique has been applied to multi-color data in order to remove most of the foreground/background galaxies so as to isolate the cluster member candidates. We have found large-scale filamentary structures around the clusters, extending out to > 5 Mpc from the cores, as well as complex inner structures. The galaxy distributions in the inner regions of the clusters look similar to the X-ray intensity maps, suggesting tha. most of the optical structures trace physically bound systems. We also compared the structures of the three clusters with those of model clusters in a numerical simulation (N-body + semi-analytic model) by parameterising the shapes of the iso-density contours of galaxies, and found a broad agreement. Our results that cluster-scale assembly takes place along filaments during hierarchical clustering need to be confirmed spectroscopically in the near future.
机译：我们已经开始了PISCES项目;斯巴鲁远处星团的全景成像和光谱调查。它利用Suprime-Cam独特的宽视场成像功能，在z＆SIM;处提供对应于16 x 13 Mpc（2）物理区域的34'x 27'视场。 1.我们计划以0.4＆LSIM为目标15个集群; z＆LSIM; 1.3。我们报告关于z = 0.55和0.83处两个遥远簇的内部结构和大规模结构的第一个结果，以及z = 0.41簇上的早期结果。光度红移技术已应用于多色数据，以去除大部分前景/背景星系，从而隔离出候选的群集成员。我们发现簇周围有大规模的丝状结构，延伸到＆GT;。从核心到复杂的内部结构仅需5 Mpc。星团内部区域的星系分布看起来与X射线强度图相似，表明存在tha。大多数光学结构跟踪物理绑定的系统。我们还通过参数化星系的等密度轮廓的形状，在数值模拟（N体+半解析模型）中比较了三个星团的结构和模型星团的结构，并找到了广泛的共识。我们的结果表明，在不久的将来，需要在光谱学上证实簇级组装在分层簇化过程中沿着细丝发生的结果。

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