Measuring $σ_8$ using DESI Legacy Imaging Surveys Emission-Line Galaxies and Planck CMB Lensing and the Impact of Dust on Parameter Inference
Tanveer Karim, Sukhdeep Singh, Mehdi Rezaie, Daniel Eisenstein, Boryana Hadzhiyska, Joshua S. Speagle, Jessica Nicole Aguilar, Steven Ahlen, David Brooks, Todd … 展开作者
Tanveer Karim, Sukhdeep Singh, Mehdi Rezaie, Daniel Eisenstein, Boryana Hadzhiyska, Joshua S. Speagle, Jessica Nicole Aguilar, Steven Ahlen, David Brooks, Todd Claybaugh, Axel de la Macorra, Simone Ferraro, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Julien Guy, Klaus Honscheid, Stephanie Juneau, David Kirkby, Alex Krolewski, Andrew Lambert, Martin Landriau, Michael Levi, Aaron Meisner, Ramon Miquel, John Moustakas, Andrea Muñoz-Gutiérrez, Adam Myers, Gustavo Niz, Nathalie Palanque Delabrouille, Will Percival, Francisco Prada, Graziano Rossi, Eusebio Sanchez, Edward Schlafly, David Schlegel, Michael Schubnell, David Sprayberry, Gregory Tarlé, Benjamin Alan Weaver, Hu Zou
Measuring the growth of structure is a powerful probe for studying the dark sector, especially in light of the $σ_8$ tension between primary CMB anisotropy and low-redshift surveys. This paper provides a new measurement of the amplitude of the matter power spectrum, $σ_8$, using galaxy-galaxy and galaxy-CMB lensing power spectra of Dark Energy Spectroscopic Instrument Legacy Imaging Surveys Emission-Line Galaxies and the $\textit{Planck}$ 2018 CMB lensing map. We create an ELG catalog composed of $24$ million galaxies and with a purity of $85\%$, covering a redshift range $0 < z < 3$, with $z_{\rm mean} = 1.09$. We implement several novel systematic corrections, such as jointly modeling the contribution of imaging systematics and photometric redshift uncertainties to the covariance matrix. We also study the impacts of various dust maps on cosmological parameter inference. We measure the cross-power spectra over $f_{\rm sky} = 0.25$ with a signal-to-background ratio of up to $ 30σ$. We find that the choice of dust maps to account for imaging systematics in estimating the ELG overdensity field has a significant impact on the final estimated values of $σ_8$ and $Ω_{\rm M}$, with far-infrared emission-based dust maps preferring $σ_8$ to be as low as $0.702 \pm 0.030$, and stellar-reddening-based dust maps preferring as high as $0.719 \pm 0.030$. The highest preferred value is at $\sim 3 σ$ tension with the $\textit{Planck}$ primary anisotropy results. These findings indicate a need for tomographic analyses at high redshifts and joint modeling of systematics.
The Atacama Cosmology Telescope DR6 and DESI: Structure growth measurements from the cross-correlation of DESI Legacy Imaging galaxies and CMB lensing from ACT DR6 and Planck PR4
The Physical Origin of Dark Energy Constraints from Rubin Observatory and CMB-S4 Lensing Tomography
我们试图澄清的起源约束的暗能量状态方程参数的CMB透镜层析,即结合星系团簇和星系的互相关与CMB透镜在一些红移箱。特别地,我们考虑了两点关联函数,它可以由星系位置表和来自Vera C的光度红移构成。Rubin Observatory Legacy Survey of Space and Time(LSST)和CMB Lensing Map来自CMB-S4实验。我们专注于分析理解的约束的起源。这些数据中的暗能量信息来自于三个主要关系的影响:距离作为红移的函数(几何),功率谱的振幅作为红移的函数(增长),以及功率谱作为波数的函数(形状)。我们发现,几何形状和生长的影响起着重要的作用,部分相互抵消,而形状的影响是不重要的。我们还表明,暗能量任务组(DETF)的品质因数(FoM)的预测相结合的LSST星系和CMB-S4透镜的预测宇宙剪切的情况下的CMB透镜图,从而提供了一个重要的独立检查。与单独使用LSST星系的预测相比,结合CMB透镜和LSST聚类信息(连同主CMB光谱),在系统性完全受控的乐观情况下,FoM大约增加了3-4倍。我们警告说,实现这些预测可能需要对高阶偏置,光度红移不确定性进行全面分析,并严格控制其他系统限制,这些都超出了这项工作的范围,其主要目的是阐明约束的物理起源。
Evolution of structure growth during dark energy domination: Insights from the cross-correlation of DESI galaxies with CMB lensing and galaxy magnification
Signals from the early Universe: a comprehensive search for primordial features in Planck CMB datasets
Università degli Studi di Ferrara(费拉拉大学);INFN, Sezione di Ferrara(意大利国家核物理研究所费拉拉分部);INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna(博洛尼亚天文物理与空间科学研究所);University of the Western Cape(西开普大学);Instituto de Física Corpuscular (IFIC), CSIC‐Universitat de València(瓦伦西亚大学西班牙国家科学研究委员会粒子物理研究所)
Finding Strong Gravitational Lenses in the DESI DECam Legacy Survey
我们在9,000度$^2$暗能量相机遗产调查(DECaLS)中执行强引力透镜系统的半自动搜索,这是DESI遗产成像调查(Dey等人)的一部分。这些调查的深度和广度的结合在这个时候是无与伦比的,使它们特别适合于发现新的强引力透镜系统。我们采用深度残差神经网络架构(He et al.)Lanusse等人为了在光度测量中找到强透镜而开发的。我们编译了一个训练集,该训练集由Legacy Surveys和DES中的已知透镜系统以及DECaLS足迹中的非透镜组成。在本文中,我们展示了将我们训练的神经网络应用于以椭圆星系为中心的剪切图像的结果(Lang等人)。在DecaLS。获得最高分数(概率)的图像将进行视觉检查和排名。在这里,我们提出了335个首次确定的候选强透镜系统。
Baryon Acoustic Oscillations in the projected cross-correlation function between the eBOSS DR16 quasars and photometric galaxies from the DESI Legacy Imaging Surveys
我们在SDSS-IV DR 16 eBOSS类星体和从DESI遗产成像巡天中选择的密集光度计星系样本之间的投影交叉关联函数中搜索重子声学振荡。我们估计在这个红移范围内的星系测光样本的密度约为2900度$^{-2}$,这是比官方DESI ELG选择更深,光谱样本的密度约为20度$^{-2}$。为了减轻与使用接近检测极限的不同成像调查相关的系统性,我们使用了一种神经网络方法,该方法考虑了成像属性和观测到的星系密度之间的复杂依赖关系。我们发现,我们是有限的成像调查的深度,影响的光度计样品的密度和纯度和重叠的红移与类星体样品,从而影响该方法的性能。当将测光星系与$0.6 \leq z \leq 1.2$中的类星体进行互相关时,与从自相关中获得的球平均距离$D_{\rm V}$(9%精度)的约束相比,互相关联函数可以对同动角距离$D_{\rm M}$(6%精度)提供更好的约束。虽然还没有竞争力,这项技术将受益于即将到来的调查,这将使它能够超越目前的限制,我们已经确定在这项工作中更深的光度数据的到来。
Probing Physics Beyond the Standard Model through Combined Analyses of Next-Generation Type Ia Supernova, CMB, and BAO Surveys
National Center for Supercomputing Applications(国家超级计算应用中心);Duke University(杜克大学);California Institute of Technology(加州理工学院);SLAC National Accelerator Laboratory(SLAC国家加速器实验室);Université Clermont Auvergne(克莱蒙奥弗涅大学);Institut de Física d’Altes Energies (IFAE)(高能物理研究所)
KiDS-Legacy: Joint analysis of second- and third-order cosmic shear
Universität Innsbruck(因斯布鲁克大学);Universität Bonn(波恩大学);University of Waterloo(滑铁卢大学);Newcastle University(纽卡斯尔大学);University of California, Santa Cruz(加州大学圣克鲁兹分校);Polish Academy of Sciences(波兰科学院);Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology(巴塞罗那高等物理研究所,巴塞罗那科学与技术学院);University of Edinburgh(爱丁堡大学);Ruhr University Bochum(鲁尔大学波鸿);Leiden University(莱顿大学)
Cluster properties as a function of dynamical state in the DESI Legacy x UNIONS surveys
University of Waterloo(滑铁卢大学);Independent University, Bangladesh(孟加拉独立大学);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);Ruhr University Bochum(波鸿鲁尔大学);Perimeter Institute for Theoretical Physics(基础物理研究所);University of Hawaii(夏威夷大学);Carnegie Mellon University(卡内基梅隆大学);National Research Council Herzberg Astronomy and Astrophysics(国家研究委员会赫茨伯格天文学和天体物理学研究所);University of British Columbia(不列颠哥伦比亚大学)
KiDS-Legacy: Constraints on Horndeski gravity from weak lensing combined with galaxy clustering and cosmic microwave background anisotropies
Ruhr University Bochum(鲁尔大学波鸿分校);Argelander-Institut für Astronomie, Universität Bonn(波恩大学阿根兰德天文研究所);Roma Tre University(罗马第三大学);University College London(伦敦大学学院);Stockholm University(斯德哥尔摩大学);Imperial College London(帝国理工学院);Royal Holloway, University of London(伦敦大学皇家霍洛威学院)