黑暗能源调查1年的WAZP星系群集样本

论文标题

黑暗能源调查1年的WAZP星系群集样本

The WaZP galaxy cluster sample of the Dark Energy Survey Year 1

论文作者

Aguena, M., Benoist, C., da Costa, L. N., Ogando, R. L., Gschwend, J., Santos, H. Sampaio dos, Lima, M., Maia, M. A., Allam, S., Avila, S., Bacon, D., Bertin, E., Bhargava, S., Brooks, D., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Costanzi, M., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Everett, S., Evrard, A., Ferrero, I., Ferté, A., Flaugher, B., Fosalba, P., Frieman, J., Garcia-Bellido, J., Giles, P., Gruendl, R., Gutierrez, G., Hinton, S., Hollowood, D. L., Honscheid, K., James, D., Jeltema, T., Kuehn, K., Kuropatkin, N., Lahav, O., Melchior, P., Miquel, R., Morgan, R., Palmese, A., Paz-Chinchon, F., Malagón, A. Plazas, Romer, K., Sanchez, E., Santiago, B., Schubnell, M., Serrano, S., Sevilla, I., Smith, M., Soares-Santos, M., Suchyta, E., Tarle, G., To, C., Tucker, D., Wilkinson, R.

论文摘要

我们提出了一个新的（2+1）d星系群集查找器，该发现器基于将DES DES（Y1A1）数据应用于小波Z光度法（WAZP）的光度光速率。将结果与South Pole望远镜（SPT）调查检测到的簇和Redmapper群集查找器进行了比较，后者基于相同的光度数据。 WAZP搜索在光度红移空间中选择的基于小波的基于小波的密度图中的簇，而无需在集群星系群体上进行任何假设。与其他群集样品的比较是根据簇的角接近度和红移差的匹配算法进行的。它导致了一种新方法的开发，以遵循一种迭代方法，以最大程度地减少不正确的关联，以匹配两个光学群集样本。适用于DES Y1A1星系调查（1,511 deg2至i = 23 mag）的WAZP群集查找器导致检测到60,547个Galaxy群集，带有红移0.05 <z <0.9 <z <0.9和Richness ngals> 5。考虑到DES Y1A1和SPT群集调查之间的重叠区域和红移范围，WAZP样品均恢复了所有基于SZ的SPT簇。WAZP和RedMapper群集样品之间的比较表现出与富裕Ngals（RedMapper）的良好总体一致的总体一致，该群集（Redmapper）与95％的股份相比，均恢复了95％的命令。基于群集交叉匹配，我们探索了两个群集样品的相对碎片，并研究了无与伦比的簇的可能签名。

We present a new (2+1)D galaxy cluster finder based on photometric redshifts called Wavelet Z Photometric (WaZP) applied to DES first year (Y1A1) data. The results are compared to clusters detected by the South Pole Telescope (SPT) survey and the redMaPPer cluster finder, the latter based on the same photometric data. WaZP searches for clusters in wavelet-based density maps of galaxies selected in photometric redshift space without any assumption on the cluster galaxy populations. The comparison to other cluster samples was performed with a matching algorithm based on angular proximity and redshift difference of the clusters. It led to the development of a new approach to match two optical cluster samples, following an iterative approach to minimize incorrect associations. The WaZP cluster finder applied to DES Y1A1 galaxy survey (1,511 deg2 up to i=23 mag) led to the detection of 60,547 galaxy clusters with redshifts 0.05<z<0.9 and richness Ngals>5. Considering the overlapping regions and redshift ranges between the DES Y1A1 and SPT cluster surveys, all SZ based SPT clusters are recovered by the WaZP sample.The comparison between WaZP and redMaPPer cluster samples showed an excellent overall agreement for clusters with richness Ngals (λ for redMaPPer) greater than 25 (20), with 95% recovery on both directions. Based on the cluster cross-match we explorethe relative fragmentation of the two cluster samples and investigate the possible signatures of unmatched clusters.

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