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29 March 2024
 
  » arxiv » 2011.03410

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Dark Energy Survey internal consistency tests of the joint cosmological probes analysis with posterior predictive distributions
C. Doux ; E. Baxter ; P. Lemos ; C. Chang ; A. Alarcon ; A. Amon ; A. Campos ; A. Choi ; M. Gatti ; D. Gruen ; M. Jarvis ; N. MacCrann ; Y. Park ; J. Prat ; M. M. Rau ; M. Raveri ; S. Samuroff ; J. DeRose ; W. G. Hartley ; B. Hoyle ; M. A. Troxel ; J. Zuntz ; T. M. C. Abbott ; M. Aguena ; S. Allam ; J. Annis ; S. Avila ; D. Bacon ; E. Bertin ; S. Bhargava ; D. Brooks ; D. L. Burke ; M. Carrasco Kind ; J. Carretero ; R. Cawthon ; M. Costanzi ; L. N. da Costa ; M. E. S. Pereira ; S. Desai ; H. T. Diehl ; J. P. Dietrich ; P. Doel ; S. Everett ; I. Ferrero ; P. Fosalba ; J. Frieman ; J. García-Bellido ; D. W. Gerdes ; T. Giannantonio ; R. A. Gruendl ; J. Gschwend ; G. Gutierrez ; S. R. Hinton ; D. L. Hollowood ; K. Honscheid ; E. M. Huff ; D. Huterer ; B. Jain ; D. J. James ; E. Krause ; K. Kuehn ; N. Kuropatkin ; O. Lahav ; C. Lidman ; M. Lima ; M. A. G. Maia ; F. Menanteau ; R. Miquel ; R. Morgan ; J. Muir ; R. L. C. Ogando ; A. Palmese ; F. Paz-Chinchón ; A. A. Plazas ; E. Sanchez ; V. Scarpine ; M. Schubnell ; S. Serrano ; I. Sevilla-Noarbe ; M. Smith ; E. Suchyta ; M. E. C. Swanson ; G. Tarle ; C. To ; D. L. Tucker ; T. N. Varga ; J. Weller ; R.D. Wilkinson ;
Date 6 Nov 2020
AbstractBeyond-$Lambda$CDM physics or systematic errors may cause subsets of a cosmological data set to appear inconsistent when analyzed assuming $Lambda$CDM. We present an application of internal consistency tests to measurements from the Dark Energy Survey Year 1 (DES Y1) joint probes analysis. Our analysis relies on computing the posterior predictive distribution (PPD) for these data under the assumption of $Lambda$CDM. We find that the DES Y1 data have an acceptable goodness of fit to $Lambda$CDM, with a probability of finding a worse fit by random chance of ${p = 0.046}$. Using numerical PPD tests, supplemented by graphical checks, we show that most of the data vector appears completely consistent with expectations, although we observe a small tension between large- and small-scale measurements. A small part (roughly 1.5%) of the data vector shows an unusually large departure from expectations; excluding this part of the data has negligible impact on cosmological constraints, but does significantly improve the $p$-value to 0.10. The methodology developed here will be applied to test the consistency of DES Year 3 joint probes data sets.
Source arXiv, 2011.03410
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