DESI 2024 V: Full-Shape galaxy clustering from galaxies and quasars

Abstract We present the measurements and cosmological implications of the galaxy two-point clustering using over 4.7 million unique galaxy and quasar redshifts in the range 0.1 < z < 2.1 divided into six redshift bins over a ∼ 7,500 square degree footprint, from the first year of observations with the Dark Energy Spectroscopic Instrument (DESI Data Release 1). By fitting the full power spectrum, we extend previous DESI DR1 baryon acoustic oscillation (BAO) measurements to include redshift-space distortions and signals from the matter-radiation equality scale. For the first time, this Full-Shape analysis is blinded at the catalogue-level to avoid confirmation bias and the systematic errors are accounted for at the two-point clustering level, which automatically propagates them into any cosmological parameter. When analysing the data in terms of compressed model-agnostic variables, we obtain a combined precision of 4.7% on the amplitude of the redshift space distortion (RSD) signal reaching a similar precision with just one year of DESI data than with twenty years of observation from the previous generation survey. We also analyse the data to directly constrain the cosmological parameters within the ΛCDM model using perturbation theory and combine this information with the reconstructed DESI DR1 galaxy BAO. Using a Big Bang Nucleosynthesis Gaussian prior on the baryon density parameter, ω b , and a weak Gaussian prior on the spectral index, n s , we constrain the matter density is Ω m = 0.296±0.010 and the Hubble constant H 0 = (68.63 ± 0.79)[km s -1 Mpc -1 ]. Additionally, we measure the amplitude of clustering σ 8 = 0.841±0.034. The DESI DR1 galaxy clustering results are in agreement with the ΛCDM model based on general relativity with parameters consistent with those from Planck . The cosmological interpretation of these results in combination with DESI DR1 Ly-α forest data and external datasets are presented in the companion paper [1].

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Publication Details

Journal
Journal of Cosmology and Astroparticle Physics
Published
2025-09-01
DOI
https://doi.org/10.1088/1475-7516/2025/09/008
Citations
44
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
Field-Weighted Citation Impact
50.81
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article

DESI 2024 V: Full-Shape galaxy clustering from galaxies and quasars

D. Kirkby, C. Ravoux, H. E. Noriega, Will J. Percival et al.
44 citations
Journal of Cosmology and Astroparticle Physics
Galaxies: Formation, Evolution, Phenomena
50.81
article

DESI 2024 V: Full-Shape galaxy clustering from galaxies and quasars

D. Kirkby, C. Ravoux, H. E. Noriega, Will J. Percival, Ting-Wen Lan, Vid Iršič, M. Schubnell, Dustin Lang, Daniel Margala, C. García-Quintero, Abhijeet Anand, P. Fagrelius, Rongpu Zhou, Paul Martini, D. Rabinowitz, Michael Walther, A. G. Smith, E. Chaussidon, A. Muñoz-Gutiérrez, N. Findlay, Humna Awan, E.A. Zaborowski, Anand Raichoor, Mathilde Pinon, Ting S. Li, N. Deiosso, Alma X. González‐Morales, Matthew M. Pieri, Ann Elliott, S. Trusov, Alejandro Avilés, Ruiyang Zhao, Eva-Maria Mueller, S. Kent, Florian Beutler, N. Palanque‐Delabrouille, S. Nadathur, H. K. Herrera-Alcantar, Violeta González-Pérez, Santiago Avila, Jeffrey A. Newman, J. Ereza, Gregory Tarlé, Kyle Dawson, L. Napolitano, Constance M. Rockosi, Andreu Font-Ribera, Shi-Fan Chen, E. Armengaud, Jorge L. Cervantes–Cota, A. G. Adame, Robert Blum, F. Valdés, D. Green, A. Porredon, Laurent Le Guillou, Christophe Yèche, Licia Verde, M. Maus, Gustavo Niz, D. Bianchi, D. Valcin, Ben Wang, David J. Schlegel, Ignasi Pérez-Ràfols, Axel de la Macorra, S. Bailey, Héctor Gil-Marín, A. Bault, J. Edelstein, Martin Landriau, Alex Krolewski, O. Alves, Marcelo A. Alvarez, Simone Ferraro, Lado Samushia, Jundan Nie, A. Brodzeller, Shaun Cole, M. E. Levi, S. Brieden, Nhat-Minh Nguyen, Rossana Ruggeri, J. Moon, N. Weaverdyck, C. Baltay, Marc Manera, Sihan Yuan, J. Lasker, Naim Göksel Karaçaylı, J. Aguilar, Nikhil Padmanabhan, Anthony Kremin, J. Guy, D. Gruen, David H. Weinberg, Eusebio Sanchez, G. Gutierrez, Satya Gontcho A Gontcho, Shadab Alam, J. Mena-Fernández, Ashley J. Ross, S. BenZvi, Alexie Leauthaud, A. Carnero Rosell, ChangHoon Hahn, Cheng Zhao, Christoph Saulder, ENRIQUE GAZTAÑAGA, Edward F. Schlafly, Daniel J. Eisenstein, A. de Mattia, Martin White, Andrei Cuceu, Frank Rodriguez-Martinez, A. Slosar, Joseph Harry Silber, Cullan Howlett, J. Chaves-Montero, Michael Wilson, Arjun T. Dey, K. Fanning, R. M. Sharples, A. Rocher, E. Paillas, J. E. Forero-Romero, T. M. Davis, Steven P. Ahlen, Aaron Meisner, Sergey E. Koposov, Pauline Zarrouk, Solène Chabanier, Biprateep Dey, S. Ramírez-Solano, Mehdi Rezaie, D. M. Alexander, M. Rashkovetskyi, Dragan Huterer A, Cullen H. Blake, C. Ramírez-Pérez, Lehman H. Garrison, K. Honscheid, Risa H. Wechsler, John Moustakas, Rafaela Gsponer, Shannon Moore, Z. Ding, Claire Poppett, D. Forero-Sánchez, U. Andrade, Patrick McDonald, E. Buckley‐Geer, Mustapha Ishak, L. Medina-Varela, A. Rosado-Marin, R. Cereskaite, Yu Yu, Xinyi Chen, M. S. Wang, Hanyu Zhang, Hui Kong, Hee‐Jong Seo, Jiaxi Yu, Jiaming Pan, M. Vargas-Magaña, Ying‐Cheng Lai, T. Tan, R. Calderón, J.M. Le Goff, V. Ruhlmann-Kleider, K. Lodha, Hu Zou, Jayashree Behera, Graziano Rossi, Boryana Hadzhiyska, Richard Neveux, B. Flaugher, P. Doel, Natalie A. Roe, J. Rich, B. A. Weaver, R. Miquel, Sarah Eftekharzadeh, M. Hanif, S. Penmetsa, R. Vaisakh, T. Claybaugh, C. Magneville, Adam D. Myers, E. Burtin, Donal Brooks, F. Prada, R. E. A. Canning, S. Juneau, R. Kehoe, D. Sprayberry, A. Pérez-Fernández, C. Gordon
article en
44 citations

Abstract

Abstract We present the measurements and cosmological implications of the galaxy two-point clustering using over 4.7 million unique galaxy and quasar redshifts in the range 0.1 < z < 2.1 divided into six redshift bins over a ∼ 7,500 square degree footprint, from the first year of observations with the Dark Energy Spectroscopic Instrument (DESI Data Release 1). By fitting the full power spectrum, we extend previous DESI DR1 baryon acoustic oscillation (BAO) measurements to include redshift-space distortions and signals from the matter-radiation equality scale. For the first time, this Full-Shape analysis is blinded at the catalogue-level to avoid confirmation bias and the systematic errors are accounted for at the two-point clustering level, which automatically propagates them into any cosmological parameter. When analysing the data in terms of compressed model-agnostic variables, we obtain a combined precision of 4.7% on the amplitude of the redshift space distortion (RSD) signal reaching a similar precision with just one year of DESI data than with twenty years of observation from the previous generation survey. We also analyse the data to directly constrain the cosmological parameters within the ΛCDM model using perturbation theory and combine this information with the reconstructed DESI DR1 galaxy BAO. Using a Big Bang Nucleosynthesis Gaussian prior on the baryon density parameter, ω b , and a weak Gaussian prior on the spectral index, n s , we constrain the matter density is Ω m = 0.296±0.010 and the Hubble constant H 0 = (68.63 ± 0.79)[km s -1 Mpc -1 ]. Additionally, we measure the amplitude of clustering σ 8 = 0.841±0.034. The DESI DR1 galaxy clustering results are in agreement with the ΛCDM model based on general relativity with parameters consistent with those from Planck . The cosmological interpretation of these results in combination with DESI DR1 Ly-α forest data and external datasets are presented in the companion paper [1].

Journal of Cosmology and Astroparticle PhysicsVol. 2025(09)
Boston University (US), Institució Catalana de Recerca i Estudis Avançats (ES), Tata Institute of Fundamental Research (IN), Universidad Complutense de Madrid (ES), Universitat Autònoma de Barcelona (ES), University of Wyoming (US), Centre National de la Recherche Scientifique (FR), Space Telescope Science Institute (US), Universidad de Guanajuato (MX), Fermi National Accelerator Laboratory (US), Institute of Space Sciences (ES), Universities Space Research Association (US), University of Arizona (US), Scuola Internazionale Superiore di Studi Avanzati (IT), Lawrence Berkeley National Laboratory (US), University of Waterloo (CA), Universidad de La Laguna (ES), Universidad de Los Andes (CO), The University of Texas at Dallas (US), University of Sussex (GB), The University of Queensland (AU), National Taiwan University (TW), University of Pittsburgh (US), Southern Methodist University (US), Ilia State University (GE), Shanghai Jiao Tong University (CN), Perimeter Institute (CA), University of California, Santa Cruz (US), University of Toronto (CA), Institute for High Energy Physics (ES), University of Milan (IT), Kansas State University (US), Durham University (GB), Chinese Academy of Sciences (CN), Brookhaven National Laboratory (US), Princeton University (US), University of California, Irvine (US), Aix-Marseille Université (FR), University of Utah (US), University of Cambridge (GB), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris-Saclay (FR), University of Michigan (US), Shanghai Astronomical Observatory (CN), Korea Astronomy and Space Science Institute (KR), Institut d'Astrophysique de Paris (FR), SLAC National Accelerator Laboratory (US), Evgeni Kharadze Georgian National Astrophysical Observatory (GE), Sejong University (KR), Center for Theoretical Physics (PL), Yale University (US), Sorbonne Université (FR), Institute for Advanced Study (US), University of Chicago (US), Max Planck Institute for Extraterrestrial Physics (DE), Institut d'Estudis Espacials de Catalunya (ES), Instituto Nacional de Investigaciones Nucleares (MX), Kavli Institute for Particle Astrophysics and Cosmology (US), Excellence Cluster Origins (DE), Laboratoire de Physique Nucléaire et de Hautes Énergies (FR), Royal Observatory (GB), Ohio University (US), Center for Astrophysics Harvard & Smithsonian (US), Summit School (US), CEA Paris-Saclay (FR), Instituto de Astrofísica de Canarias (ES), Institut National de Physique Nucléaire et de Physique des Particules (FR), Community Science and Data Center (US), Centro de Investigación en Materiales Avanzados (MX), Laboratoire de Physique Subatomique et de Cosmologie (FR), Institute for Fundamental Physics of the Universe (IT), Flatiron Health (United States) (US), Instituto de Astrofísica de Andalucía (ES), Secretaría de Ciencia, Humanidades, Tecnología e Innovación (MX), National Astronomical Observatories (CN), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES), University College London (GB), UK Astronomy Technology Centre (GB), École Polytechnique Fédérale de Lausanne (CH), The Ohio State University (US), University of Rochester (US), Swinburne University of Technology (AU), University of Portsmouth (GB), Universidad Autónoma de Madrid (ES), Universitat de Barcelona (ES), Ludwig-Maximilians-Universität München (DE), Beihang University (CN), Universidad Autónoma del Estado de Morelos (MX), Korea University of Science and Technology (KR), Universidad Nacional Autónoma de México (MX), Siena College (US), University of California, Berkeley (US), Universitat Politècnica de Catalunya (ES), Stanford University (US), Tsinghua University (CN)
Openalex Percentile: Top 0%
Galaxies: Formation, Evolution, Phenomena
50.81
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