The Atacama Cosmology Telescope: A census of bridges between galaxy clusters
G. Isopi, V. Capalbo, A. D. Hincks, L. Di Mascolo, E. Barbavara, E. S. Battistelli, J. R. Bond, W. Cui, W. R. Coulton, M. De Petris, M. Devlin, K. Dolag, J. Dun… 展开作者
G. Isopi, V. Capalbo, A. D. Hincks, L. Di Mascolo, E. Barbavara, E. S. Battistelli, J. R. Bond, W. Cui, W. R. Coulton, M. De Petris, M. Devlin, K. Dolag, J. Dunkley, D. Fabjan, A. Ferragamo, A. S. Gill, Y. Guan, M. Halpern, M. Hilton, J. P. Hughes, M. Lokken, J. van Marrewijk, K. Moodley, T. Mroczkowski, J. Orlowski-Scherer, E. Rasia, S. Santoni, C. Sifón, E. J. Wollack, G. Yepes
According to CMB measurements, baryonic matter constitutes about $5\%$ of the mass-energy density of the universe. A significant population of these baryons, for a long time referred to as `missing', resides in a low density, warm-hot intergalactic medium (WHIM) outside galaxy clusters, tracing the ``cosmic web'', a network of large scale dark matter filaments. Various studies have detected this inter-cluster gas, both by stacking and by observing individual filaments in compact, massive systems. In this paper, we study short filaments (< 10 Mpc) connecting massive clusters ($M_{500} \approx 3\times 10^{14} M_{\odot}$) detected by the Atacama Cosmology Telescope (ACT) using the scattering of CMB light off the ionised gas, a phenomenon known as the thermal Sunyaev-Zeldovich (tSZ) effect. The first part of this work is a search for suitable candidates for high resolution follow-up tSZ observations. We identify four cluster pairs with an intercluster signal above the noise floor (S/N $>$ 2), including two with a tentative $>2σ$ statistical significance for an intercluster bridge from the ACT data alone. In the second part of this work, starting from the same cluster sample, we directly stack on ${\sim}100$ cluster pairs and observe an excess SZ signal between the stacked clusters of $y=(7.2^{+2.3}_{-2.5})\times 10^{-7}$ with a significance of $3.3σ$. It is the first tSZ measurement of hot gas between clusters in this range of masses at moderate redshift ($\langle z\rangle\approx 0.5$). We compare this to the signal from simulated cluster pairs with similar redshifts and separations in the THE300 and MAGNETICUM Pathfinder cosmological simulations and find broad consistency. Additionally, we show that our measurement is consistent with scaling relations between filament parameters and mass of the embedded halos identified in simulations.
Cosmic Birefringence from the Atacama Cosmology Telescope Data Release 6
Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理学研究所);Ludwig-Maximilians-Universität München(慕尼黑大学);Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), Todai Institutes for Advanced Study, The University of Tokyo(东京大学前沿研究院 Kavli宇宙物理与数学研究所)
Weak-Lensing Mass Calibration of the Atacama Cosmology Telescope Equatorial Sunyaev-Zeldovich Cluster Sample with the Canada-France-Hawaii Telescope Stripe 82 Survey
The Atacama Cosmology Telescope: A Test of the Gravitational Force Law on Cosmological Scales Using the Kinematic Sunyaev-Zeldovich Effect
University of Pennsylvania(宾夕法尼亚大学);Kavli Institute for Cosmological Physics, University of Chicago(芝加哥大学卡弗里宇宙物理研究所);University of Southern California(南加州大学);Columbia University(哥伦比亚大学);Stanford University(斯坦福大学);Simons Society of Fellows, Simons Foundation(西蒙斯基金会西蒙斯学者协会);Cornell University(康奈尔大学);Sapienza University of Rome(罗马第一大学);Cardiff University(卡迪夫大学);University of California, Riverside(加州大学河滨分校);Pontificia Universidad Católica de Chile(智利天主教 Pontificia 大学);Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile(智利天主教 Pontificia 大学物理学院天体物理研究所);Centro de Astro-Ingeniería, Pontificia Universidad Católica de Chile(智利天主教 Pontificia 大学天文工程中心)
The Atacama Cosmology Telescope: A demonstration of CMB lensing measurement from daytime data
University of Cambridge(剑桥大学);Kavli Institute for Cosmology Cambridge(卡弗里宇宙学剑桥研究所);Kavli Institute for Particle Astrophysics and Cosmology(卡弗里粒子天体物理与宇宙学研究所);SLAC National Accelerator Laboratory(斯坦福直线加速器中心);University of Pennsylvania(宾夕法尼亚大学);Princeton University(普林斯顿大学);Cardiff University(卡迪夫大学)
The Atacama Cosmology Telescope: Constraints on Local Non-Gaussianity from the ACT Cluster Catalog
ICCUB, University of Barcelona(巴塞罗那大学);Canadian Institute for Theoretical Astrophysics, University of Toronto(多伦多大学理论天体物理研究所);Wits Centre for Astrophysics, School of Physics, University of the Witwatersrand(威特沃特斯兰德大学物理学院天体物理中心);Astrophysics Research Centre, School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal(夸祖鲁-纳塔尔大学数学、统计与计算机科学学院天体物理研究中心);ICREA(加泰罗尼亚高级研究院);Department of Physics and Astronomy, University of Pittsburgh(匹兹堡大学物理与天文系);Department of Physics, Stanford University(斯坦福大学物理系);Kavli Institute for Particle Astrophysics and Cosmology(卡弗里粒子天体物理与宇宙学研究所)
The Atacama Cosmology Telescope: $B$-mode delensing with DR6 data and external tracers of large-scale structure
University of Cambridge(剑桥大学);UC Berkeley(加州大学伯克利分校);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);Stanford University(斯坦福大学);University of Toronto(多伦多大学);Cardiff University(卡迪夫大学);University of Pennsylvania(宾夕法尼亚大学);Princeton University(普林斯顿大学);Université Paris-Saclay(巴黎萨克雷大学);The University of Tokyo(东京大学);Stony Brook University(石溪大学);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心)
Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope
我们提出了一个新的测量的运动学Sunyaev-Zeldovich效应使用的数据从阿塔卡玛宇宙望远镜(ACT)和重子振荡光谱巡天(BOSS)。使用600平方度的重叠天空区域,我们评估了与BOSS DR 11大尺度结构目录中50,000个明亮星系的位置相关的平均成对重子动量。一个非零信号来自包含样本星系的晕的大尺度运动。数据拟合的分析信号模型以及,与微波光子散射的光学深度作为一个自由参数确定的整体信号幅度。我们估计的协方差矩阵的平均成对动量作为星系分离的函数,使用微波天空模拟,折刀评估,和自助估计。最保守的基于模拟的误差给出了不同星系光度削减的信噪比估计在3.6和4.1之间。我们讨论了如何其他错误的决定,可以导致更高的信噪比值,并考虑几种可能的系统误差的影响。从样本星系位置的平均热Sunyaev-Zeldovich信号的光学深度的估计与从平均成对动量信号获得的光学深度的估计大致一致。
The Atacama Cosmology Telescope: Detection of the Pairwise Kinematic Sunyaev-Zel'dovich Effect with SDSS DR15 Galaxies
我们提出了一个5.4 $σ$检测成对运动学Sunyaev-Zel'dovich(kSZ)的影响,使用阿塔卡玛宇宙望远镜(ACT)和$\it{Planck}$ CMB的观测结合从斯隆数字巡天(SDSS)DR 15目录的亮红星系样本。结果是使用三个ACT CMB地图获得的:共同添加的150 GHz和98 GHz地图,结合2008-2018年(ACT DR 5)的观测结果,与SDSS DR 15重叠超过3,700平方米。度,和一个使用2014-2015年(ACT DR 4)夜间观测的分量分离图,与SDSS DR 15重叠超过2,089平方米。°的这三个地图的结果的比较提供了关于潜在的频率相关的前景污染的一致性检查。总共有343,647个星系被用作示踪剂,以识别和定位星系群和星系团,并使用孔径测光从中提取kSZ信号。我们考虑了各种孔径测光假设和协方差估计方法对信号提取的影响。成对速度的理论预测用于获得最佳拟合,质量平均,光学深度估计为五个亮度选择示踪剂样品。kSZ派生的光学深度测量在这里获得的那些来自热SZ效应相同的样品的比较是在配套文件。
The Atacama Cosmology Telescope: DR6 Power Spectrum Foreground Model and Validation
Universite Paris Cite, CNRS, Astroparticule et Cosmologie(巴黎西岱大学、法国国家科学研究中心、亚原子粒子与宇宙学);Cardiff University(卡迪夫大学);Columbia University(哥伦比亚大学);Flatiron Institute(平顿研究所);Princeton University(普林斯顿大学);Cornell University(康奈尔大学);Kavli Institute for Cosmology Cambridge(卡弗里宇宙学剑桥研究所);University of California, Riverside(加州大学河滨分校);Stanford University(斯坦福大学);California Institute of Technology(加州理工学院);Jet Propulsion Laboratory(喷气推进实验室);University of Toronto(多伦多大学);Arizona State University(亚利桑那州立大学);University of Oxford(牛津大学);IJCLab(伊吉克拉布);University of KwaZulu-Natal(夸祖鲁-纳塔尔大学);Institute of Theoretical Astrophysics, University of Oslo(奥斯陆大学理论天体物理研究所);Haverford College(哈弗福德学院);SLAC National Accelerator Laboratory(斯坦福直线加速器中心);Stony Brook University(石溪大学);Carnegie Mellon University(卡内基梅隆大学);NASA/Goddard Space Flight Center(美国宇航局戈达德太空飞行中心)
The Atacama Cosmology Telescope: DR6 Constraints on Isotropic Time-Dependent Cosmic Birefringence from Axion-like Particles
Cornell University(康奈尔大学);University of California, Riverside(加州大学河滨分校);Cardiff University(卡迪夫大学);University of Southern California(南加州大学);University of Oslo(奥斯陆大学);Princeton University(普林斯顿大学);Arizona State University(亚利桑那州立大学);NASA/Goddard Space Flight Center(美国国家航空航天局戈达德太空飞行中心)