Optical-SZE Scaling Relations for DES Optically Selected Clusters within the SPT-SZ Survey
A. Saro, S. Bocquet, J. Mohr, E. Rozo, B. A. Benson, S. Dodelson, E. S. Rykoff, L. Bleem, T. M. C. Abbott, F. B. Abdalla, S. Allen, J. Annis, A. Benoit-Levy, D.… 展开作者
A. Saro, S. Bocquet, J. Mohr, E. Rozo, B. A. Benson, S. Dodelson, E. S. Rykoff, L. Bleem, T. M. C. Abbott, F. B. Abdalla, S. Allen, J. Annis, A. Benoit-Levy, D. Brooks, D. L. Burke, R. Capasso, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, I. Chiu, T. M. Crawford, C. E. Cunha, C. B. D'Andrea, L. N. da Costa, S. Desai, J. P. Dietrich, A. E. Evrard, A. Fausti Neto, B. Flaugher, P. Fosalba, J. Frieman, C. Gangkofner, E. Gaztanaga, D. W. Gerdes, T. Giannantonio, S. Grandis, D. Gruen, R. A. Gruendl, N. Gupta, G. Gutierrez, W. L. Holzapfel, D. J. James, K. Kuehn, N. Kuropatkin, M. Lima, J. L. Marshall, M. McDonald, P. Melchior, F. Menanteau, R. Miquel, R. Ogando, A. A. Plazas, D. Rapetti, C. L. Reichardt, K. Reil, A. K. Romer, E. Sanchez, V. Scarpine, M. Schubnell, I. Sevilla-Noarbe, R. C. Smith, M. Soares-Santos, B. Soergel, V. Strazzullo, E. Suchyta, M. E. C. Swanson, G. Tarle, D. Thomas, V. Vikram, A. R. Walker, A. Zenteno
We study the Sunyaev-Zel'dovich effect (SZE) signature in South Pole Telescope (SPT) data for an ensemble of 719 optically identified galaxy clusters selected from 124.6 deg$^2$ of the Dark Energy Survey (DES) science verification data, detecting a stacked SZE signal down to richness $λ\sim20$. The SZE signature is measured using matched-filtered maps of the 2500 deg$^2$ SPT-SZ survey at the positions of the DES clusters, and the degeneracy between SZE observable and matched-filter size is broken by adopting as priors SZE and optical mass-observable relations that are either calibrated using SPT selected clusters or through the Arnaud et al. (2010, A10) X-ray analysis. We measure the SPT signal to noise $ζ$-$λ$, relation and two integrated Compton-$y$ $Y_\textrm{500}$-$λ$ relations for the DES-selected clusters and compare these to model expectations accounting for the SZE-optical center offset distribution. For clusters with $λ> 80$, the two SPT calibrated scaling relations are consistent with the measurements, while for the A10-calibrated relation the measured SZE signal is smaller by a factor of $0.61 \pm 0.12$ compared to the prediction. For clusters at $20 < λ< 80$, the measured SZE signal is smaller by a factor of $\sim$0.20-0.80 (between 2.3 and 10~$σ$ significance) compared to the prediction, with the SPT calibrated scaling relations and larger $λ$ clusters showing generally better agreement. We quantify the required corrections to achieve consistency, showing that there is a richness dependent bias that can be explained by some combination of contamination of the observables and biases in the estimated masses. We discuss possible physical effects, as contamination from line-of-sight projections or from point sources, larger offsets in the SZE-optical centering or larger scatter in the $λ$-mass relation at lower richnesses.
Sunyaev-Zel'dovich Effect and X-ray Scaling Relations from Weak-Lensing Mass Calibration of 32 SPT Selected Galaxy Clusters
质量可观测标度关系的不确定性是目前基于星系团的宇宙学的限制因素。弱引力透镜可以提供直接的质量校准并减小质量不确定性。我们提出了新的地基弱透镜观测的19个南极望远镜（SPT）选定的星系团在红移$0.29 \leq z \leq 0.61$，并将它们与以前报道的空间观测的13个星系团在红移$0.576 \leq z \leq 1.132$约束与Sunyaev-Zel'dovich效应（SZE），集群气体质量\mgas，\yx，\mgas \和X射线温度的产品的集群质量标度关系。我们扩展了以前使用的尺度关系和宇宙学约束的分析框架，从SPT选择集群利用弱透镜信息。本文介绍了一种新的方法来估计背景星系的有效平均红移分布，并量化了一些影响弱透镜模型的系统误差。这些误差包括使用$N$体模拟将Navarro-Frenk-White剖面拟合到减小的剪切而引起的偏差的校准。我们对分析进行盲化以避免确认偏差。我们能够将系统的不确定性限制在5.6%的集群质量（68%的置信度）。我们对质量-X射线可观测的标度关系参数的约束与早期研究所获得的一致，我们对质量-SZE标度关系的约束与最近SPT-SZ宇宙学分析中使用的基于模拟的先验一致。我们现在可以取代外部质量校准先验使用在以前的SPT-SZ宇宙学研究与直接，内部校准获得相同的集群。
Analysis of Sunyaev-Zel'dovich Effect Mass-Observable Relations using South Pole Telescope Observations of an X-ray Selected Sample of Low Mass Galaxy Clusters and Groups
Multichroic TES Bolometers and Galaxy Cluster Mass Scaling Relations with the South Pole Telescope
南极望远镜（英语：South Pole Telescope）是一个高分辨率的微波频率望远镜，用于观测宇宙微波背景（CMB）。到目前为止，已经在SPT上安装了两台摄像机，对CMB进行了两次调查，第一次是强度调查（SPT-SZ），第二次是强度和偏振调查（SPTpol）。目前正在开发第三代偏振敏感相机（SPT-3G）。本论文介绍了工作跨越所有三个仪器上的SPT。我提出我的工作在时间颠倒的顺序，遵循仪器开发，部署和分析的规范叙述。首先，新的3波段多色过渡边缘传感器（TES）的SPT-3G实验测辐射热计的开发和测试进行了详细说明，其次是频率复用低温读出电子的SPTpol实验的开发和部署，并得出结论与SPT-SZ仪器所采取的数据分析。我描述了一个贝叶斯似然为基础的方法，我开发的测量综合康普顿化（YSZ）的星系团的Sunyaev-Zel 'dovich（SZ）效应，并限制星系团YSZ质量标度关系的发展。
Euclid: Quick Data Release (Q1) -- Watching ICM-selected galaxy clusters with Euclid eyes -- prospects of Euclid data in the context of large SZ and X-ray based surveys
SPT-CL J0417-4748: A Deep Chandra Study of a Relaxed Galaxy Cluster Without Central Star Formation
Chulalongkorn University（朱拉隆功大学）；Kavli Institute for Particle Astrophysics and Cosmology, Stanford University（斯坦福大学卡弗里粒子天体物理与宇宙学研究所）；Department of Physics, Stanford University（斯坦福大学物理系）；SLAC National Accelerator Laboratory（斯坦福直线加速器中心）；Department of Physics and Astronomy, Rutgers University（罗格斯大学物理与天文系）
