DES Y1 results: Splitting growth and geometry to test Λ CDM

Muir, J.; Baxter, E.; Miranda, V.; Doux, C.; Ferté, A.; Leonard, C.  D.; Huterer, D.; Jain, B.; Lemos, P.; Raveri, M.; Nadathur, S.; Campos, A.; Chen, A.; Dodelson, S.; Elvin-Poole, J.; Lee, S.; Secco, L.  F.; Troxel, M.  A.; Weaverdyck, N.; Zuntz, J.; Brout, D.; Choi, A.; Crocce, M.; Davis, T.  M.; Gruen, D.; Krause, E.; Lidman, C.; MacCrann, N.; Möller, A.; Prat, J.; Ross, A.  J.; Sako, M.; Samuroff, S.; Sánchez, C.; Scolnic, D.; Zhang, B.; Abbott, T.  M. C.; Aguena, M.; Allam, S.; Annis, J.; Avila, S.; Bacon, D.; Bertin, E.; Bhargava, S.; Bridle, S.  L.; Brooks, D.; Burke, D.  L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Cawthon, R.; Costanzi, M.; da Costa, L.  N.; Pereira, M.  E. S.; Desai, S.; Diehl, H.  T.; Dietrich, J.  P.; Doel, P.; Estrada, J.; Everett, S.; Evrard, A.  E.; Ferrero, I.; Flaugher, B.; Frieman, J.; García-Bellido, J.; Giannantonio, T.; Gruendl, R.  A.; Gschwend, J.; Gutierrez, G.; Hinton, S.  R.; Hollowood, D.  L.; Honscheid, K.; Hoyle, B.; James, D.  J.; Jeltema, T.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Lima, M.; Maia, M.  A. G.; Menanteau, F.; Miquel, R.; Morgan, R.; Myles, J.; Palmese, A.; Paz-Chinchón, F.; Plazas, A.  A.; Romer, A.  K.; Roodman, A.; Sanchez, E.; Scarpine, V.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Suchyta, E.; Swanson, M.  E. C.; Tarle, G.; Thomas, D.; To, C.; Tucker, D.  L.; Varga, T.  N.; Weller, J.; Wilkinson, R.  D.

doi:10.1103/physrevd.103.023528

Title: DES Y1 results: Splitting growth and geometry to test Λ CDM

Journal Article · Thu Jan 21 00:00:00 EST 2021 · Physical Review D

DOI:https://doi.org/10.1103/physrevd.103.023528· OSTI ID:1706145

;

; Miranda, V.;

;

; Leonard, C. D.;

;

; Troxel, M. A.;

; Zuntz, J. more »

We analyze Dark Energy Survey (DES) data to constrain a cosmological model where a subset of parameters—focusing on Ω_m—are split into versions associated with structure growth (e.g., Ω$$^{grow}_m$$) and expansion history (e.g., Ω$$^{geo}_m$$). Once the parameters have been specified for the ΛCDM cosmological model, which includes general relativity as a theory of gravity, it uniquely predicts the evolution of both geometry (distances) and the growth of structure over cosmic time. Any inconsistency between measurements of geometry and growth could therefore indicate a breakdown of that model. Our growth-geometry split approach therefore serves both as a (largely) model-independent test for beyond-ΛCDM physics, and as a means to characterize how DES observables provide cosmological information. We analyze the same multiprobe DES data as [Phys. Rev. Lett. 122, 171301 (2019)] : DES Year 1 (Y1) galaxy clustering and weak lensing, which are sensitive to both growth and geometry, as well as Y1 BAO and Y3 supernovae, which probe geometry. We additionally include external geometric information from BOSS DR12 BAO and a compressed Planck 2015 likelihood, and external growth information from BOSS DR12 RSD. We find no significant disagreement with Ω$$^{grow}_m$$=Ω$$^{geo}_m$$. When DES and external data are analyzed separately, degeneracies with neutrino mass and intrinsic alignments limit our ability to measure Ω$$^{grow}_m$$, but combining DES with external data allows us to constrain both growth and geometric quantities. We also consider a parametrization where we split both Ω_m and w, but find that even our most constraining data combination is unable to separately constrain Ω$$^{grow}_m$$ and w^grow. Relative to ΛCDM, splitting growth and geometry weakens bounds on σ₈ but does not alter constraints on h.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States); Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Gordon and Betty Moore Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

Contributing Organization:: DES Collaboration

Grant/Contract Number:: AC02-07CH11359; DGE-1144245; OPP-1248097; PHY-0114422; PHY-1125897; GBMF947; SC0015640; AC02-76SF00515; AC02-05CH11231; FP7/2007-2013; 465376/2014-2; SEV-2016-0588; SEV-2016-0597; MDM-2015-0509; PGC2018-094773; PGC2018-102021; ESP2017-89838; AST-1536171; AST-1138766; 291329; 240672; 306478; 2012B-0001; AC05-00OR22725; SC0010118; SC0019193

OSTI ID:: 1706145

Alternate ID(s):: OSTI ID: 1778824; OSTI ID: 1807210; OSTI ID: 1837675; OSTI ID: 1872416

Report Number(s):: FERMILAB-PUB-20-529-AE; DES-2019-0520; oai:inspirehep.net:1822496; TRN: US2204582

Journal Information:: Physical Review D, Vol. 103, Issue 2; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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