Bibcode
Abbott, T. M. C.; Acevedo, M.; Adamow, M.; Aguena, M.; Alarcon, A.; Allam, S.; Alves, O.; Andrade-Oliveira, F.; Annis, J.; Armstrong, P.; Avila, S.; Bacon, D.; Bechtol, K.; Blazek, J.; Bocquet, S.; Brooks, D.; Brout, D.; Burke, D. L.; Camacho, H.; Camilleri, R.; Campailla, G.; Carnero Rosell, A.; Carr, A.; Carretero, J.; Castander, F. J.; Cawthon, R.; Chan, K. C.; Chang, C.; Chen, R.; Conselice, C.; Costanzi, M.; Crocce, M.; da Costa, L. N.; Pereira, M. E. S.; Davis, T. M.; De Vicente, J.; Deiosso, N.; Desai, S.; Diehl, H. T.; Dodelson, S.; Doel, P.; Doux, C.; Drlica-Wagner, A.; Elvin-Poole, J.; Everett, S.; Ferrero, I.; Ferté, A.; Flaugher, B.; Fosalba, P.; Frieman, J.; Galbany, L.; García-Bellido, J.; Gatti, M.; Gaztanaga, E.; Giannini, G.; Gruen, D.; Gruendl, R. A.; Gutierrez, G.; Hartley, W. G.; Herner, K.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; Huterer, D.; James, D. J.; Jeffrey, N.; Jeltema, T.; Kessler, R.; Lahav, O.; Lee, J.; Lee, S.; Lidman, C.; Lin, H.; Lin, M.; Marshall, J. L.; Mena-Fernández, J.; Miquel, R.; Muir, J.; Möller, A.; Nichol, R. C.; Palmese, A.; Paterno, M.; Percival, W. J.; Pieres, A.; Plazas Malagón, A. A.; Popovic, B.; Porredon, A.; Prat, J.; Qu, H.; Raveri, M.; Rodriguez-Monroy, M.; Romer, A. K.; Rykoff, E. S.; Sako, M.; Samuroff, S.; Sanchez, E.; Sanchez Cid, D.; Scolnic, D.; Sevilla-Noarbe, I.; Shah, P. et al.
Referencia bibliográfica
Physical Review D
Fecha de publicación:
3
2026
Revista
Número de citas
53
Número de citas referidas
0
Descripción
The Dark Energy Survey (DES) recently released the final results of its two principal probes of the expansion history: Type Ia supernovae (SNe) and baryonic acoustic oscillations (BAO). In this paper, we explore the cosmological implications of these data in combination with external cosmic microwave background (CMB), big bang nucleosynthesis (BBN), and age-of-the-Universe information. The BAO measurement, which is ∼2σ away from Planck 's ΛCDM predictions, pushes for low values of Ωm compared to Planck, in contrast to SN which prefers a higher value than Planck. We identify several tensions among datasets in the ΛCDM model that cannot be resolved by including either curvature (kΛCDM) or a constant dark energy equation of state (wCDM). By combining BAO+SN+CMB despite these mild tensions, we obtain Ωk=-5.5-4.2+4.6×10-3 in kΛCDM, and w=-0.948-0.027+0.028 in wCDM. In wCDM, BAO and SN push again in different directions of parameter space, favoring, respectively, w<-1 and w>-1. If we open the parameter space to w0waCDM [where the equation of state of dark energy varies as w(a)=w0+(1-a)wa], all the datasets are mutually more compatible, and we find concordance in the [w0>-1,wa<0] quadrant, with BAO pushing for wa<0 and SN for [w0>-1,wa<0]. For DES BAO and SN in combination with Planck -CMB, we find a 3.2σ deviation from ΛCDM, with w0=-0.673-0.097+0.098, wa=-1.37-0.50+0.51, a Hubble constant of H0=67.81-0.86+0.96 km s-1 Mpc-1, and an abundance of matter of Ωm=0.3109-0.0099+0.0086. For the combination of all the background cosmological probes considered (including CMB's angular acoustic scale θ⋆), we still find a deviation of 2.8σ from ΛCDM in the w0-wa plane. Assuming a minimal neutrino mass, this work provides tentative evidence for non-ΛCDM physics, which is consistent with recent claims in support of evolving dark energy, or a source of unknown systematics.