Bibcode
Lemos, P.; Raveri, M.; Campos, A.; Park, Y.; Chang, C.; Weaverdyck, N.; Huterer, D.; Liddle, A. R.; Blazek, J.; Cawthon, R.; Choi, A.; DeRose, J.; Dodelson, S.; Doux, C.; Gatti, M.; Gruen, D.; Harrison, I.; Krause, E.; Lahav, O.; MacCrann, N.; Muir, J.; Prat, J.; Rau, M. M.; Rollins, R. P.; Samuroff, S.; Zuntz, J.; Aguena, M.; Allam, S.; Annis, J.; Avila, S.; Bacon, D.; Bernstein, G. M.; Bertin, E.; Brooks, D.; Burke, D. L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Castander, F. J.; Conselice, C.; Costanzi, M.; Crocce, M.; Pereira, M. E. S.; Davis, T. M.; De Vicente, J.; Desai, S.; Diehl, H. T.; Doel, P.; Eckert, K.; Eifler, T. F.; Elvin-Poole, J.; Everett, S.; Evrard, A. E.; Ferrero, I.; Ferté, A.; Flaugher, B.; Fosalba, P.; Frieman, J.; García-Bellido, J.; Gaztanaga, E.; Gerdes, D. W.; Giannantonio, T.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hartley, W. G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; Hoyle, B.; Huff, E. M.; James, D. J.; Jarvis, M.; Lima, M.; Maia, M. A. G.; March, M.; Marshall, J. L.; Martini, P.; Melchior, P.; Menanteau, F.; Miquel, R.; Mohr, J. J.; Morgan, R.; Myles, J.; Ogando, R. L. C.; Palmese, A.; Pandey, S.; Paz-Chinchón, F.; Plazas Malagón, A. A.; Rodriguez-Monroy, M.; Roodman, A.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Secco, L. F.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Soares-Santos, M.; Suchyta, E. et al.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society
Advertised on:
8
2021
Citations
60
Refereed citations
51
Description
Quantifying tensions - inconsistencies amongst measurements of cosmological parameters by different experiments - has emerged as a crucial part of modern cosmological data analysis. Statistically significant tensions between two experiments or cosmological probes may indicate new physics extending beyond the standard cosmological model and need to be promptly identified. We apply several tension estimators proposed in the literature to the dark energy survey (DES) large-scale structure measurement and Planck cosmic microwave background data. We first evaluate the responsiveness of these metrics to an input tension artificially introduced between the two, using synthetic DES data. We then apply the metrics to the comparison of Planck and actual DES Year 1 data. We find that the parameter differences, Eigentension, and Suspiciousness metrics all yield similar results on both simulated and real data, while the Bayes ratio is inconsistent with the rest due to its dependence on the prior volume. Using these metrics, we calculate the tension between DES Year 1 3 × 2pt and Planck, finding the surveys to be in ~2.3σ tension under the ΛCDM paradigm. This suite of metrics provides a toolset for robustly testing tensions in the DES Year 3 data and beyond.
Related projects
Molecular Gas and Dust in Galaxies Across Cosmic Time
Two of the most fundamental questions in astrophysics are the conversion of molecular gas into stars and how this physical process is a function of environments on all scales, ranging from planetary systems, stellar clusters, galaxies to galaxy clusters. The main goal of this internal project is to get insight into the formation and evolution of
Helmut
Dannerbauer