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arXiv 1708.01360astro-ph.CO
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用SPT和DES 1年数据测量CMB簇透镜效应

A Measurement of CMB Cluster Lensing with SPT and DES Year 1 Data

E. J. Baxter, S. Raghunathan, T. M. Crawford, P. Fosalba, Z. Hou, G. P. Holder, Y. Omori, S. Patil, E. Rozo, T. M. C. Abbott, J. Annis, K. Aylor, A. Benoit-Lévy… 展开作者

E. J. Baxter, S. Raghunathan, T. M. Crawford, P. Fosalba, Z. Hou, G. P. Holder, Y. Omori, S. Patil, E. Rozo, T. M. C. Abbott, J. Annis, K. Aylor, A. Benoit-Lévy, B. A. Benson, E. Bertin, L. Bleem, E. Buckley-Geer, D. L. Burke, J. Carlstrom, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, C. L. Chang, H-M. Cho, A. T. Crites, M. Crocce, C. E. Cunha, L. N. da Costa, C. B. D'Andrea, C. Davis, T. de Haan, S. Desai, M. A. Dobbs, S. Dodelson, J. P. Dietrich, P. Doel, A. Drlica-Wagner, J. Estrada, W. B. Everett, A. Fausti Neto, B. Flaugher, J. Frieman, J. García-Bellido, E. M. George, E. Gaztanaga, T. Giannantonio, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, N. W. Halverson, N. L. Harrington, W. G. Hartley, W. L. Holzapfel, K. Honscheid, J. D. Hrubes, B. Jain, D. J. James, M. Jarvis, T. Jeltema, L. Knox, E. Krause, K. Kuehn, S. Kuhlmann, N. Kuropatkin, O. Lahav, A. T. Lee, E. M. Leitch, T. S. Li, M. Lima, D. Luong-Van, A. Manzotti, M. March, D. P. Marrone, J. L. Marshall, P. Martini, J. J. McMahon, P. Melchior, F. Menanteau, S. S. Meyer, C. J. Miller, R. Miquel, L. M. Mocanu, J. J. Mohr, T. Natoli, B. Nord, R. L. C. Ogando, S. Padin, A. A. Plazas, C. Pryke, D. Rapetti, C. L. Reichardt, A. K. Romer, A. Roodman, J. E. Ruhl, E. Rykoff, M. Sako, E. Sanchez, J. T. Sayre, V. Scarpine, K. K. Schaffer, R. Schindler, M. Schubnell, I. Sevilla-Noarbe, E. Shirokoff, M. Smith, R. C. Smith, M. Soares-Santos, F. Z. Staniszewski, A. Stark, K. Story, E. Suchyta, G. Tarle, D. Thomas, M. A. Troxel, K. Vanderlinde, J. D. Vieira, A. R. Walker, R. Williamson, Y. Zhang, J. Zuntz

摘要:

星系团的引力透镜的宇宙微波背景(CMB)辐射,导致在CMB的弧分尺度上的一个明显的印记。对这种效应的测量提供了一种有希望的方法来限制星系团的质量,特别是那些在高红移的星系团。我们使用CMB地图从南极望远镜Sunyaev-Zel'dovich(SZ)调查测量的CMB透镜信号周围的星系团确定的光学成像从第一年的观测的暗能量调查。在这个分析中使用的集群目录包含3697个成员的平均红移为$\bar{z} = 0.45$。我们探测到宇宙微波背景辐射被星系团以$8.1σ$显著性透镜化。使用测得的透镜信号,我们限制集群质量和光学丰富度之间的关系的幅度大致$17\%$精度,发现与最近的限制与星系透镜。的误差预算占主导地位的统计噪声,但包括显着的贡献,由于热SZ效应和集群偏心的系统偏差。

英文摘要:

Clusters of galaxies gravitationally lens the cosmic microwave background (CMB) radiation, resulting in a distinct imprint in the CMB on arcminute scales. Measurement of this effect offers a promising way to constrain the masses of galaxy clusters, particularly those at high redshift. We use CMB maps from the South Pole Telescope Sunyaev-Zel'dovich (SZ) survey to measure the CMB lensing signal around galaxy clusters identified in optical imaging from first year observations of the Dark Energy Survey. The cluster catalog used in this analysis contains 3697 members with mean redshift of $\bar{z} = 0.45$. We detect lensing of the CMB by the galaxy clusters at $8.1σ$ significance. Using the measured lensing signal, we constrain the amplitude of the relation between cluster mass and optical richness to roughly $17\%$ precision, finding good agreement with recent constraints obtained with galaxy lensing. The error budget is dominated by statistical noise but includes significant contributions from systematic biases due to the thermal SZ effect and cluster miscentering.

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