Extended dark energy analysis using DESI DR2 BAO measurements

Lodha, K.; Calderón, R.; Matthewson, William L.; Shafieloo, Arman; Ishak, M; Pan, Jian; García-Quintero, C.; Huterer, Dragan; Valogiannis, Georgios; López, Luís Alfonso Ureña; Kamble, Nilima S.; Parkinson, David; Kim, A. G.; Zhao, Geng; Cervantes–Cota, Jorge L.; Rohlf, J.; Lozano-Rodríguez, F.; Román-Herrera, J. O.; Adame, A. G.; Aguilar, José Edgar Madriz; Ahlen, S.; Alves, O.; Andrade, U.; Avilés, Alejandro; Avilés, Alejandro; Behera, J.; BenZvi, S.; Bianchi, D.; Brodzeller, A.; Brooks, David J.; Burtin, E.; Canning, Rebecca; Rosell, A. Carnero; Casas, Lidia; Castander, F. J.; Charles, M.; Chaussidon, E.; Chaves-Montero, J.; Chebat, D.; Claybaugh, T.; Cole, Shaun; Cuceu, A.; Dawson, K. S.; Macorra, Axel de la; Mattia, Arnaud de; Deiosso, N.; Demina, R.; Dey, Arjun; Dey, Biprateep; Ding, Z.; Doel, P.; Eisenstein, D. J.; Elbers, Willem; Ferraro, Simone; Font-Ribera, Andreu; Forero-Romero, J. E.; Garrison, Lehman H.; Gaztañaga, E.; Gil-Marín, Héctor; Gontcho, Satya Gontcho A; González‐Morales, Alma X.; Gutierrez, G.; Guy, J.; Hahn, Chang Hoon; Herbold, M.; Herrera-Alcantar, H. K.; Howlett, Cullan; Howlett, Cullan; Juneau, S.; Kehoe, R.; Kirkby, Diane; Kisner, Theodore; Kremin, A.; Lahav, O.; Lamman, C.; Landriau, M.; Guillou, L. Le; Leauthaud, A.; Levi, M. E.; Li, Qiong; Magneville, C.; Manera, Marc; Martini, Paul; Meisner, Aaron; Mena-Fernández, J.; Miquel, R.; Moustakas, John; Santos, D.; Muñoz-Gutiérrez, A.; Myers, Adam D.; Nadathur, S.; Niz, G.; Noriega, H. E.; Paillas, E.; Palanque‐Delabrouille, N.; Percival, Will J.; Pieri, Matthew M.; Poppett, Claire; Prada, Francisco; Pérez-Fernández, A.; Pérez-Ràfols, Ignasi; Ramírez-Pérez, C.; Rashkovetskyi, M.; Ravoux, C.; Ross, Ashley J.; Rossi, Graziano; Ruhlmann-Kleider, V.; Samushia, Lado; Sanchez, E.; Schlegel, David J.; Schubnell, M.; Seo, Hee‐Jong; Sinigaglia, Francesco; Sprayberry, David; Tan, T.; Tarlé, G.; Taylor, Paul A.; Turner, W.; Vargas-Magaña, M.; Walther, Michael; Weaver, B. A.; Wolfson, Molly; Yèche, Christophe; Zarrouk, Pauline; Zhou, Rongpu; Zou, Hu

doi:10.1103/w4c6-1r5j

articlePhysical review. D/Physical review. D.Oct 6, 2025HYBRID OA

Extended dark energy analysis using DESI DR2 BAO measurements

KLK. Lodha RCR. Calderón WLWilliam L. Matthewson ASArman Shafieloo MIM Ishak

Korea Astronomy and Space Science Institute · Korea University of Science and Technology · +75 more institutions

Indexed inarxivcrossref

Abstract

We conduct an extended analysis of dark energy constraints, in support of the findings of the Dark Energy Spectroscopic Instrument (DESI) second data release cosmology key paper, including DESI data, Planck cosmic microwave background observations, and three different supernova compilations. Using a broad range of parametric and nonparametric methods, we explore the dark energy phenomenology and find consistent trends across all approaches, in good agreement with the w0waCDM (cold dark matter) key paper results. Even with the additional flexibility introduced by nonparametric approaches, such as binning and Gaussian processes, we find that extending ΛCDM to include a two-parameter w(z) is sufficient to capture…

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Topics & keywords

Topics

Keywords

Dark energy
Quintessence
Cosmic microwave background
Planck
Cosmology
Redshift
Nonparametric statistics
Baryon acoustic oscillations

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