TY - JOUR

T1 - Cosmological measurements from angular power spectra analysis of BOSS DR12 tomography

AU - Loureiro, Arthur

AU - Moraes, Bruno

AU - Abdalla, Filipe B.

AU - Cuceu, Andrei

AU - McLeod, Michael

AU - Whiteway, Lorne

AU - Balan, Sreekumar T.

AU - Benoit-Lévy, Aurélien

AU - Lahav, Ofer

AU - Manera, Marc

AU - Rollins, Richard P.

AU - Xavier, Henrique S.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - © 2019 The Author 2019. Published by Oxford University Press on behalf of The Royal Astronomical Society. We constrain cosmological parameters by analysing the angular power spectra of the Baryon Oscillation Spectroscopic Survey DR12 galaxies, a spectroscopic follow-up of around 1.3 million SDSS galaxies over 9376 deg2 with an effective volume of ∼6.5 (Gpc h-1)3 in the redshift range 0.15 ≤ z < 0.80. We split this sample into 13 tomographic bins (Δz = 0.05); angular power spectra were calculated using a Pseudo-Cℓ estimator, and covariance matrices were estimated using lognormal simulated maps. Cosmological constraints obtained from these data were combined with constraints from Planck cosmic microwave background experiment as well as the JLA supernovae compilation. Considering a wCDM cosmological model measured on scales up to kmax = 0.07h Mpc-1, we constrain a constant dark energy equation-of-state with an ∼ 4 error at the 1σ level: w_0 =-0.993 +0.046-0.043}, together with ωm = 0.330 ± 0.012, ωb = 0.0505 ± 0.002, S_8 σ 8\Ωm/0.3 = 0.863 0.016, and h = 0.661 ± 0.012. For the same combination of data sets, but now considering a ΛCDM (lambda cold dark matter) model with massive neutrinos and the same scale cut, we find ωm = 0.328 ± 0.009, Ω b = 0.05017{+0.0009-0.0008}, S8 = 0.862 ± 0.017, and h = 0.663-+0.006-0.007, and a 95 per cent credible interval (CI) upper limit of ν < 0.14 eV for a normal hierarchy. These results are competitive if not better than standard analyses with the same data set, and demonstrate that this should be a method of choice for future surveys, opening the door for their full exploitation in cross-correlation probes.

AB - © 2019 The Author 2019. Published by Oxford University Press on behalf of The Royal Astronomical Society. We constrain cosmological parameters by analysing the angular power spectra of the Baryon Oscillation Spectroscopic Survey DR12 galaxies, a spectroscopic follow-up of around 1.3 million SDSS galaxies over 9376 deg2 with an effective volume of ∼6.5 (Gpc h-1)3 in the redshift range 0.15 ≤ z < 0.80. We split this sample into 13 tomographic bins (Δz = 0.05); angular power spectra were calculated using a Pseudo-Cℓ estimator, and covariance matrices were estimated using lognormal simulated maps. Cosmological constraints obtained from these data were combined with constraints from Planck cosmic microwave background experiment as well as the JLA supernovae compilation. Considering a wCDM cosmological model measured on scales up to kmax = 0.07h Mpc-1, we constrain a constant dark energy equation-of-state with an ∼ 4 error at the 1σ level: w_0 =-0.993 +0.046-0.043}, together with ωm = 0.330 ± 0.012, ωb = 0.0505 ± 0.002, S_8 σ 8\Ωm/0.3 = 0.863 0.016, and h = 0.661 ± 0.012. For the same combination of data sets, but now considering a ΛCDM (lambda cold dark matter) model with massive neutrinos and the same scale cut, we find ωm = 0.328 ± 0.009, Ω b = 0.05017{+0.0009-0.0008}, S8 = 0.862 ± 0.017, and h = 0.663-+0.006-0.007, and a 95 per cent credible interval (CI) upper limit of ν < 0.14 eV for a normal hierarchy. These results are competitive if not better than standard analyses with the same data set, and demonstrate that this should be a method of choice for future surveys, opening the door for their full exploitation in cross-correlation probes.

KW - cosmology: observations

KW - dark energy

KW - large-scale structure of Universe

KW - neutrinos

KW - MASSIVE NEUTRINOS

KW - LUMINOUS RED GALAXIES

KW - STATISTICAL-ANALYSIS

KW - EXTRAGALACTIC OBJECTS

KW - OSCILLATION SPECTROSCOPIC SURVEY

KW - PARAMETER CONSTRAINTS

KW - DIGITAL SKY SURVEY

KW - MICROWAVE BACKGROUND ANISOTROPY

KW - BARYON ACOUSTIC-OSCILLATIONS

KW - CROSS-CORRELATION

UR - http://www.mendeley.com/research/cosmological-measurements-angular-power-spectra-analysis-boss-dr12-tomography

U2 - 10.1093/mnras/stz191

DO - 10.1093/mnras/stz191

M3 - Article

VL - 485

SP - 326

EP - 355

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -