Dark Energy Survey year 1 results: Constraints on extended cosmological models from galaxy clustering and weak lensing

Journal Article · Fri Jun 07 00:00:00 EDT 2019 · Physical Review D

DOI:https://doi.org/10.1103/physrevd.99.123505· OSTI ID:1755660

Abbott, T.  M. C.; Abdalla, F.  B.; Avila, S.; Banerji, M.; Baxter, E.; Bechtol, K.; Becker, M.  R.; Bertin, E.; Blazek, J.; Bridle, S.  L.; Brooks, D.; Brout, D.; Burke, D.  L.; Campos, A.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Castander, F.  J.; Cawthon, R.; Chang, C. ; Chen, A.; Crocce, M.; Cunha, C.  E.; da Costa, L.  N.; Davis, C.; De Vicente, J.; DeRose, J.; Desai, S.; Di Valentino, E.; Diehl, H.  T.; Dietrich, J.  P.; Dodelson, S.; Doel, P.; Drlica-Wagner, A.; Eifler, T.  F.; Elvin-Poole, J.; Evrard, A.  E.; Fernandez, E.; Ferté, A.; Flaugher, B.; Fosalba, P.; Frieman, J.; García-Bellido, J.; Gaztanaga, E.; Gerdes, D.  W.; Giannantonio, T.; Gruen, D.; Gruendl, R.  A.; Gschwend, J.; Gutierrez, G.; Hartley, W.  G.; Hollowood, D.  L.; Honscheid, K.; Hoyle, B.; Huterer, D.; Jain, B.; Jeltema, T.; Johnson, M.  W. G.; Johnson, M.  D.; Kim, A.  G.; Krause, E.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Lee, S.; Lemos, P.; Leonard, C.  D.; Li, T.  S.; Liddle, A.  R.; Lima, M.; Lin, H.; Maia, M.  A. G.; Marshall, J.  L.; Martini, P.; Menanteau, F.; Miller, C.  J.; Miquel, R.; Miranda, V.; Mohr, J.  J.; Muir, J.; Nichol, R.  C.; Nord, B.; Ogando, R.  L. C.; Plazas, A.  A.; Raveri, M.; Rollins, R.  P.; Romer, A.  K.; Roodman, A.; Rosenfeld, R.; Samuroff, S.; Sanchez, E.; Scarpine, V.; Schindler, R.; Schubnell, M.; Scolnic, D.; Secco, L.  F.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Soares-Santos, M.; Sobreira, F.; Suchyta, E.; Swanson, M.  E. C.; Tarle, G.; Thomas, D.; Troxel, M.  A.; Vikram, V.; Walker, A.  R.; Weaverdyck, N.; Wechsler, R.  H.; Weller, J.; Yanny, B.; Zhang, Y.; Zuntz, J.

We introduce constraints on extensions of the minimal cosmological models dominated by dark matter and dark energy, ΛCDM and wCDM, by utilizing a combined analysis of galaxy clustering and weak gravitational lensing from the first-year data of the Dark Energy Survey (DES Y1) in combination with external data. We consider four extensions of the minimal dark energy-dominated scenarios: (1) nonzero curvature Ω_k, (2) number of relativistic species N_eff different from the standard value of 3.046, (3) time-varying equation-of-state of dark energy described by the parameters w₀ and w_a (alternatively quoted by the values at the pivot redshift, w_p, and w_a), and (4) modified gravity described by the parameters μ₀ and Σ₀ that modify the metric potentials. We also consider external information from Planck cosmic microwave background measurements; baryon acoustic oscillation measurements from SDSS, 6dF, and BOSS; redshift-space distortion measurements from BOSS; and type Ia supernova information from the Pantheon compilation of datasets. Constraints on curvature and the number of relativistic species are dominated by the external data; when these are combined with DES Y1, we find Ω_k=0.0020$$^{+0.0037}_{-0.0032} $$ at the 68% confidence level, and the upper limit N_eff<3.28(3.55) at 68% (95%) confidence, assuming a hard prior N_eff>3.0. For the time-varying equation-of-state, we find the pivot value (w_p,w_a)=(-0.91$$^{+0.19}_{-0.23} $$,-0.57$$^{+0.93}_{-1.11} $$) at pivot redshift z_p=0.27 from DES alone, and (w_p,w_a)=(-1.01$$^{+0.04}_{-0.04} $$,-0.28$$^{+0.37}_{-0.48} $$) at z_p=0.20 from DES Y1 combined with external data; in either case we find no evidence for the temporal variation of the equation of state. For modified gravity, we find the present-day value of the relevant parameters to be Σ₀=0.43$$^{+0.28}_{-0.29} $$ from DES Y1 alone, and (Σ₀,μ₀)=(0.06$$^{+0.08}_{-0.07} $$,-0.11$$^{+0.42}_{-0.46} $$) from DES Y1 combined with external data. These modified-gravity constraints are consistent with predictions from general relativity.

• Research Organization: Carnegie Mellon Univ., Pittsburgh, PA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); The Ohio State Univ., Columbus, OH (United States); Univ. of Michigan, Ann Arbor MI (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); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
• Contributing Organization: DES Collaboration
• Grant/Contract Number: SC0019193; SC0011726; SC0007859; AC05-00OR22725; SC0010118; AC02-07CH11359; AST-1138766; AST-1536171; AC02-05CH11231; ACI-1445606; AC02-76SF00515; AYA2015-71825; ESP2015-88861; FPA2015-68048; SEV-2012-0234; SEV-2016-0597; MDM-2015-0509; 240672; 291329; 306478; FP7/2007-2013; CE110001020
• OSTI ID: 1755660
• Alternate ID(s): OSTI ID: 1487047; OSTI ID: 1531219; OSTI ID: 1532377; OSTI ID: 1546227; OSTI ID: 1550901; OSTI ID: 1602526; OSTI ID: 1725773
• Report Number(s): arXiv:1810.02499; FERMILAB-PUB-18-507-PPD; DES-2018-0376; TRN: US2205563
• Journal Information: Physical Review D, Vol. 99, Issue 12; ISSN 2470-0010
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Dark energy
Dark matter
Large scale structure of the Universe