We report a $5σ$ detection of the pairwise kinematic Sunyaev-Zel'dovich (kSZ) effect, combining galaxy clusters in DESI imaging surveys and the Planck temperature maps. The detection is facilitated by both improvements in the data and in the analysis method. For the data, we adopt the recently released galaxy group catalog (Y20: \cite{yang2020extended}) with $\sim 10^6$ robustly-identified groups, and construct various galaxy cluster samples for the kSZ measurement. The Y20 catalogue also provides estimation of halo mass, which further improves the kSZ measurement by $\sim 10\%$. For the analysis method, we derive an optimal estimator of pairwise kSZ through the maximum likelihood analysis. It also handles potential systematic errors self-consistently. The baseline cluster sample, containing the $1.2\times 10^5$ richest galaxy clusters of typical mass ~$ 10^{14} M_{\odot}/h$ at typical redshift $0.2$-$0.5$, rules out the null hypothesis at $5σ$. When fitting with a pairwise kSZ template from simulations, the signal is detected at $4.7σ$ and the average optical depth is constrained as $\barτ_e=(1.66\pm 0.35)\times 10^{-4}$. We perform various internal checks, with different cluster selection criteria, different sky coverage and redshift range, different CMB maps, different filter sizes, different treatments of potential systematics and the covariance matrix. The kSZ effect is consistently detected with $2.5\leq $S/N$\leq 5.6$ and acceptable $χ^2_{\rm min}$, across a variety of cluster samples. The S/N is limited by both the Planck resolution and the photo-z accuracy, and therefore can be significant improved with DESI spectroscopic redshift information and with other CMB experiments.
Measurement of the pairwise kinematic Sunyaev-Zeldovich effect with Planck and BOSS data
利用普朗克宇宙微波背景辐射和重子振荡谱巡天数据,提出了一种新的动力学Sunyaev-Zeldovich效应的测量方法。利用BOSS DR 12的“LowZ北/南”星系星表和BOSS DR 13的星系群星表,我们计算了BOSS星系的平均成对kSZ温度。我们构建了一个“中央星系表”(CGC),其中包括孤立的星系从原来的BOSS数据集,并应用孔径测光(AP)过滤器,以抑制主CMB的贡献。通过构建晕圈模型来拟合成对kSZ函数,我们将“LowZ North CGC”的平均光学深度约束为$\barτ=(0.53\pm0.32)\times10^{-4}(1.65\,σ)$,“LowZ South CGC”的平均光学深度约束为$\barτ=(0.30\pm0.57)\times10^{-4}(0.53\,σ)$,“DR 13 Group”的平均光学深度约束为$\barτ=(0.43\pm0.28)\times10^{-4}(1.53\,σ)$。此外,我们改变了AP过滤器的半径,发现AP大小的$7\,{\rm arcmin}$给出了最大的检测$\barτ$。我们还研究了信号与晕圈质量的相关性,并发现了“DR 13组”的$\barτ=(0.32\pm0.36)\times10^{-4}(0.8\,σ)$和$\barτ=(0.67\pm0.46)\times10^{-4}(1.4\,σ)$,晕圈质量分…
Robustness of pairwise kinematic Sunyaev-Zel'dovich effect to optical-cluster-selection bias
Ludwig-Maximilians-Universität(路德维希-马克西米利安大学);Max-Planck-Institut für extraterrestrische Physik (MPE)(马克斯·普朗克地外物理研究所);Institute of Astronomy and Astrophysics, Academia Sinica (ASIAA)(中央研究院天文及天文物理研究所);Excellence Cluster ORIGINS(ORIGINS卓越集群);University of Pennsylvania(宾夕法尼亚大学);Max-Planck-Institut für Astrophysik(马克斯·普朗克天体物理研究所);University of Chicago(芝加哥大学);Southern Methodist University(南方卫理公会大学);European Southern Observatory(欧洲南方天文台);University of Arizona(亚利桑那大学)
Detection of the Pairwise Kinematic Sunyaev-Zel'dovich Effect and Pairwise Velocity with DESI DR1 Galaxies and ACT DR6 and Planck CMB Data
Cornell University(康奈尔大学);University of Pennsylvania(宾夕法尼亚大学);Duke University(杜克大学);Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK(剑桥大学天文研究所);Kavli Institute for Cosmology Cambridge, Madingley Road, Cambridge, CB3 0HA, UK(卡弗里宇宙学剑桥研究所);Ludwig-Maximilians-Universität(慕尼黑大学);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);Boston University(波士顿大学);Università degli Studi di Milano(米兰大学);INAF-Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台)
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: Cross-correlation of kSZ and continuity equation velocity reconstruction with photometric DESI LRGs
Flatiron Institute(平顿研究所);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);University of California, Berkeley(加州大学伯克利分校);University of Toronto(多伦多大学);Princeton University(普林斯顿大学);Perimeter Institute for Theoretical Physics(理论物理前沿研究所);York University(约克大学);University of KwaZulu-Natal(夸祖鲁-纳塔尔大学);The University of Tokyo(东京大学);Stanford University(斯坦福大学);SLAC National Accelerator Laboratory(SLAC国家加速器实验室);Pontificia Universidad Católica de Valparaíso(天主教瓦尔帕莱索大学);Arizona State University(亚利桑那州立大学);Duke University(杜克大学);Cornell University(康奈尔大学);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心)
Probing Baryons with the Kinematic Sunyae Zel'dovich Effect and Machine Learning Derived Peculiar Velocities using DESI DR2 and ACT DR6
Cornell University(康奈尔大学);University of Pennsylvania(宾夕法尼亚大学);Kavli Institute for Cosmology Cambridge(卡弗里宇宙学剑桥研究所);Academia Sinica (ASIAA)(中央研究院天文及天体物理研究所);Duke University(杜克大学);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);Boston University(波士顿大学);Instituto Avanzado de Cosmología A. C.(先进宇宙学研究所);Universidad Nacional Autónoma de México(墨西哥国立自治大学)
Estimation and mitigation of foregrounds in projected kSZ velocity reconstruction
University of Cambridge(剑桥大学);Kavli Institute for Cosmology Cambridge(卡弗里宇宙学剑桥研究所);Berkeley Center for Cosmological Physics, Department of Physics, University of California, Berkeley(加州大学伯克利分校物理系宇宙学物理中心);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);Institute of Astronomy, University of Cambridge(剑桥大学天文研究所)
The suppression of the matter power spectrum: strong feedback from X-ray gas mass fractions, kSZ effect profiles, and galaxy-galaxy lensing
Princeton University(普林斯顿大学);University of Cambridge(剑桥大学);Liverpool John Moores University(利物浦约翰摩尔斯大学);Leiden University(莱顿大学);University of Zurich(苏黎世大学)
本文通过联合分析eROSITA和HSC-XXL样本的X射线气体质量分数及SDSS/DESI+ACT的kSZ效应轮廓,研究了气体反馈对物质功率谱的抑制效应,发现其抑制幅度在k=1 h Mpc⁻¹时为10±2%,且比主流模拟预测更强。
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)
First Cosmological Constraints from the Joint Analysis of Galaxy Clustering and the Kinetic Sunyaev-Zel'dovich Effect
School of Physics and Astronomy, Sun Yat-sen University(中山大学物理学院);CSST Science Center for the Guangdong–Hong Kong–Macau Greater Bay Area, SYSU(中山大学深空巡天科学中心)
Measurement of the galaxy-velocity power spectrum of DESI tracers with the kinematic Sunyaev-Zeldovich effect using DESI DR2 and ACT DR6
Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);Perimeter Institute for Theoretical Physics(理论物理前沿研究所);Berkeley Center for Cosmological Physics, Department of Physics, University of California, Berkeley(加州大学伯克利分校物理系宇宙学物理中心);Center for Cosmology and AstroParticle Physics, The Ohio State University(俄亥俄州立大学宇宙学与天体粒子物理中心);Department of Physics, The Ohio State University(俄亥俄州立大学物理系);Department of Physics, Boston University(波士顿大学物理系);Dipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di Milano(米兰大学阿尔多·庞特莫利物理系);INAF-Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台);Department of Physics & Astronomy, University College London(伦敦大学学院物理与天文学系)
Precision Kinematic Sunyaev--Zel'dovich Measurements Across Halo Mass and Redshift with DESI DR2 and ACT DR6: Part II. Bright Galaxy Survey and Emission-Line Galaxies
Institute of Astronomy(天体物理研究所);Kavli Institute for Cosmology Cambridge(卡弗里宇宙学剑桥研究所);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);Berkeley Center for Cosmological Physics, Department of Physics, University of California, Berkeley(加州大学伯克利分校物理系宇宙学物理中心);Kavli Institute for Particle Astrophysics and Cosmology, Stanford University(斯坦福大学卡弗里粒子天体物理学和宇宙学研究所);Department of Physics, Stanford University(斯坦福大学物理系);SLAC National Accelerator Laboratory(SLAC国家加速器实验室)
Exploring gas thermodynamics around galaxies from the Sunyaev-Zel'dovich effects: impact of galaxy-halo connection, 2D projection and velocity field
Stanford University(斯坦福大学);Kavli Institute for Particle Astrophysics and Cosmology(卡弗里粒子天体物理学与宇宙学研究所);SLAC National Accelerator Laboratory(SLAC国家加速器实验室)
Precision Kinematic Sunyaev--Zel'dovich Measurements Across Halo Mass and Redshift with DESI DR2 and ACT DR6: Part I. Luminous Red Galaxies
Stanford University(斯坦福大学);SLAC National Accelerator Laboratory(SLAC国家加速器实验室);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);University of California, Berkeley(加州大学伯克利分校)