The Atacama Cosmology Telescope DR6 and DESI: structure formation over cosmic time with a measurement of the cross-correlation of CMB lensing and luminous red galaxies

Abstract We present a high-significance cross-correlation of CMB lensing maps from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) with luminous red galaxies (LRGs) from the Dark Energy Spectroscopic Instrument (DESI) Legacy Survey spectroscopically calibrated by DESI. We detect this cross-correlation at a significance of 38 σ ; combining our measurement with the Planck Public Release 4 (PR4) lensing map, we detect the cross-correlation at 50 σ . Fitting this jointly with the galaxy auto-correlation power spectrum to break the galaxy bias degeneracy with σ 8 , we perform a tomographic analysis in four LRG redshift bins spanning 0.4 ≤ z ≤ 1.0 to constrain the amplitude of matter density fluctuations through the parameter combination S 8 × = σ 8 (Ω m / 0.3) 0.4 . Prior to unblinding, we confirm with extragalactic simulations that foreground biases are negligible and carry out a comprehensive suite of null and consistency tests. Using a hybrid effective field theory (HEFT) model that allows scales as small as k max = 0.6 h/ Mpc, we obtain a 3.3% constraint on S 8 × = σ 8 (Ω m / 0.3) 0.4 = 0.792 +0.024 -0.028 from ACT data, as well as constraints on S 8 × ( z ) that probe structure formation over cosmic time. Our result is consistent with the early-universe extrapolation from primary CMB anisotropies measured by Planck PR4 within 1.2 σ . Jointly fitting ACT and Planck lensing cross-correlations we obtain a 2.7% constraint of S 8 × = 0.776 +0.019 -0.021 , which is consistent with the Planck early-universe extrapolation within 2.1 σ , with the lowest redshift bin showing the largest difference in mean. The latter may motivate further CMB lensing tomography analyses at z < 0.6 to assess the impact of potential systematics or the consistency of the ΛCDM model over cosmic time.

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Publication Details

Journal
Journal of Cosmology and Astroparticle Physics
Published
2024-12-01
DOI
https://doi.org/10.1088/1475-7516/2024/12/022
Citations
31
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
Field-Weighted Citation Impact
10.28

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article

The Atacama Cosmology Telescope DR6 and DESI: structure formation over cosmic time with a measurement of the cross-correlation of CMB lensing and luminous red galaxies

D. Kirkby, Will J. Percival, D. Brooks, Frank J. Qu et al.
31 citations
Journal of Cosmology and Astroparticle Physics
Galaxies: Formation, Evolution, Phenomena
10.28
article

The Atacama Cosmology Telescope DR6 and DESI: structure formation over cosmic time with a measurement of the cross-correlation of CMB lensing and luminous red galaxies

D. Kirkby, Will J. Percival, D. Brooks, Frank J. Qu, Lukas Wenzl, Michael S. Schubnell, Graziano Rossi, N. Palanque‐Delabrouille, Kavilan Moodley, Jo Dunkley, Jeffrey A. Newman, Gregory Tarlé, Andreu Font-Ribera, Shi-Fan Chen, Emmanuel Schaan, Laurent Le Guillou, David Sprayberry, Christophe Yèche, Gustavo Niz, David J. Schlegel, Axel de la Macorra, Martin Landriau, Noah Sailer, Simone Ferraro, N. MacCrann, Vera Gluscevic, M. E. Levi, Gerrit S. Farren, Marc Manera, John Orlowski-Scherer, J. Aguilar, J. Guy, Eusebio Sanchez, Mathew S. Madhavacheril, Satya Gontcho A Gontcho, Suzanne T. Staggs, Laura Newburgh, Neelima Sehgal, Alexander van Engelen, Omar Darwish, ENRIQUE GAZTAÑAGA, Steve K. Choi, Edward F. Schlafly, K. Honscheid, Shabbir Shaikh, Martin White, Erminia Calabrese, Cullan Howlett, Cristobál Sifón, Irene Abril-Cabezas, Arjun T. Dey, Joseph DeRose, J. E. Forero-Romero, Steven P. Ahlen, Aaron Meisner, Gabriela A. Marques, R. Miquel, Theodore S. Kisner, Mark J. Devlin, Edward J. Wollack, John Moustakas, Carmen Embil-Villagra, Blake D. Sherwin, Francisco Prada, Hee-Jung Seo, Hu Zou, Joshua Kim, T. Claybaugh, Benjamin A. Weaver, P. Doel, J. Richard Bond, E. Burtin
article en
31 citations

Abstract

Abstract We present a high-significance cross-correlation of CMB lensing maps from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) with luminous red galaxies (LRGs) from the Dark Energy Spectroscopic Instrument (DESI) Legacy Survey spectroscopically calibrated by DESI. We detect this cross-correlation at a significance of 38 σ ; combining our measurement with the Planck Public Release 4 (PR4) lensing map, we detect the cross-correlation at 50 σ . Fitting this jointly with the galaxy auto-correlation power spectrum to break the galaxy bias degeneracy with σ 8 , we perform a tomographic analysis in four LRG redshift bins spanning 0.4 ≤ z ≤ 1.0 to constrain the amplitude of matter density fluctuations through the parameter combination S 8 × = σ 8 (Ω m / 0.3) 0.4 . Prior to unblinding, we confirm with extragalactic simulations that foreground biases are negligible and carry out a comprehensive suite of null and consistency tests. Using a hybrid effective field theory (HEFT) model that allows scales as small as k max = 0.6 h/ Mpc, we obtain a 3.3% constraint on S 8 × = σ 8 (Ω m / 0.3) 0.4 = 0.792 +0.024 -0.028 from ACT data, as well as constraints on S 8 × ( z ) that probe structure formation over cosmic time. Our result is consistent with the early-universe extrapolation from primary CMB anisotropies measured by Planck PR4 within 1.2 σ . Jointly fitting ACT and Planck lensing cross-correlations we obtain a 2.7% constraint of S 8 × = 0.776 +0.019 -0.021 , which is consistent with the Planck early-universe extrapolation within 2.1 σ , with the lowest redshift bin showing the largest difference in mean. The latter may motivate further CMB lensing tomography analyses at z < 0.6 to assess the impact of potential systematics or the consistency of the ΛCDM model over cosmic time.

Journal of Cosmology and Astroparticle PhysicsVol. 2024(12)
University of California, Riverside (US), Boston University (US), Institució Catalana de Recerca i Estudis Avançats (ES), Universitat Autònoma de Barcelona (ES), Space Telescope Science Institute (US), Universidad de Guanajuato (MX), Pontificia Universidad Católica de Valparaíso (CL), Fermi National Accelerator Laboratory (US), Hiroshima Shudo University (JP), High Energy Accelerator Research Organization (JP), University of Waterloo (CA), The University of Queensland (AU), University of Pittsburgh (US), Perimeter Institute (CA), Institute for High Energy Physics (ES), Princeton University (US), Cornell University (US), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), University of Michigan (US), California Southern University (US), Regional Municipality of Waterloo (CA), Sejong University (KR), Sofia University (US), Institute for Advanced Study (US), National Solar Observatory (US), Institut d'Estudis Espacials de Catalunya (ES), Kavli Institute for Particle Astrophysics and Cosmology (US), Menlo School (US), Institut Català de Ciències del Clima (ES), Laboratoire de Physique Nucléaire et de Hautes Énergies (FR), Canadian Institute for Theoretical Astrophysics (CA), Centre for Theoretical Physics and Astrophysics (UZ), Michigan United (US), Unidades Centrales Científico-Técnicas (ES), CEA Paris-Saclay (FR), UC Irvine Health (US), National Astronomical Observatories (CN), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES), State Library of Ohio (US), University College London (GB), Arizona State University (US), Stony Brook University (US), University of Portsmouth (GB), Geneva College (US), University of Pennsylvania (US), Universidad Intercontinental (MX), Universidad Nacional Autónoma de México (MX), Siena College (US), Netherlands Institute for Radio Astronomy (NL), University of KwaZulu-Natal (ZA), University of California, Berkeley (US)
National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Princeton University, University of Pennsylvania, Compute Canada, Government of Ontario, National Energy Research Scientific Computing Center, European Commission, National Research Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, University of Toronto, Fundación Bancaria Caixa d'Estalvis i Pensions de Barcelona, Agencia Nacional de Investigación y Desarrollo, National Institute of Standards and Technology, Office of Science, Oak Ridge Institute for Science and Education, High Energy Physics, Lawrence Berkeley National Laboratory
Openalex Percentile: Top 1%
Galaxies: Formation, Evolution, Phenomena
10.28
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