Modified gravity constraints from the full shape modeling of clustering measurements from DESI 2024

作者：Mustapha Ishak, J. Pan, R. Calderón, K. Lodha, Georgios Valogiannis, Alejandro Avilés, Gustavo Niz, Liu Chiao Yi, Chenghang Zheng, C. García-Quintero, Arnaud de Mattia, L. Medina-Varela, Jorge L. Cervantes–Cota, U. Andrade, Dragan Huterer, H. E. Noriega, Gong‐Bo Zhao, Arman Shafieloo, Wei Fang, S. P. Ahlen, D. Bianchi, D. Brooks, E. Burtin, E. Chaussidon, T. Claybaugh, S. Cole, Axel de la Macorra, Arjun Dey, K. Fanning, S Ferraro, Andreu Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, Héctor Gil-Marín, S.Gontcho A. Gontcho, G. Gutiérrez, Chang Hoon Hahn, Klaus Honscheid, Cullan Howlett, S. Juneau, D. Kirkby, Theodore Kisner, Anthony Kremin, M. Landriau, L. Le Guillou, Alexie Leauthaud, M.E. Levi, Aaron Meisner, R. Miquel, John Moustakas, J.A. Newman, N. Palanque‐Delabrouille, W.J. Percival, Claire Poppett, Francisco Prada, Ignasi Pérez-Ràfols, A.J. Ross, Giacomo Rossi, E. Sánchez, David J. Schlegel, M. Schubnell, Hee‐Jong Seo, D. Sprayberry, G. Tarlé, M. Vargas-Magaña, B.A. Weaver, R.H. Wechsler, Christophe Yèche, Pauline Zarrouk, Rongpu Zhou, Hu Zou · 发表于：Journal of Cosmology and Astroparticle Physics · 年份：2025 · DOI：10.1088/1475-7516/2025/09/053 · 被引用次数：45 · 研究领域：Geophysics and Gravity Measurements、Cosmology and Gravitation Theories、Scientific Research and Discoveries

Abstract We present cosmological constraints on deviations from general relativity (GR) from the first-year of clustering observations from the Dark Energy Spectroscopic Instrument (DESI) in combination with other available datasets including the CMB data from Planck with CMB-lensing from Planck and ACT, BBN constraints on the physical baryon density, the galaxy weak lensing and clustering from DESY3 and supernova data from DESY5. We first consider the μ ( a,k )–Σ( a,k ) modified gravity (MG) parameterization (as well as η ( a,k )) in a ΛCDM and a w 0 w a CDM cosmological backgrounds. Using a functional form for time-only evolution gives μ 0 = 0.11 +0.44 -0.54 from DESI(FS+BAO)+BBN and a wide prior on n s . Using DESI(FS+BAO)+CMB+DESY3+DESY5-SN, we obtain μ 0 = 0.05 ± 0.22 and Σ 0 = 0.008 ± 0.045 and similarly μ 0 = 0.02 +0.19 -0.24 and η 0 = 0.09 +0.36 -0.60 , in an ΛCDM background. In w 0 w a CDM we obtain μ 0 = -0.24 +0.32 -0.28 and Σ 0 = 0.006 ± 0.043, consistent with GR, and we still find a preference of the data for a dynamical dark energy with w 0 > -1 and w a < 0. Using functional dependencies in both time and scale gives μ 0 and Σ 0 with a same level of precision as above but other scale MG parameters remain hard to constrain. We then move to binned parameterizations in a ΛCDM background starting with two bins in redshift and obtain, μ 1 = 1.02 ± 0.13, μ 2 = 1.04 ± 0.11, Σ 1 = 1.021 ± 0.029 and Σ 2 = 1.022 +0.027 -0.023 , all consistent with the unity value of ...