Details

Autor(en) / Beteiligte

• Sánchez, C
• Alarcon, A
• Bernstein, G M
• Sanchez, J
• Pandey, S
• Raveri, M
• Prat, J
• Weaverdyck, N
• Sevilla-Noarbe, I
• Chang, C
• Baxter, E
• Omori, Y
• Jain, B
• Alves, O
• Amon, A
• Bechtol, K
• Becker, M R
• Blazek, J
• Choi, A
• Campos, A
• Rosell, A Carnero
• Kind, M Carrasco
• Crocce, M
• Cross, D
• DeRose, J
• Diehl, H T
• Dodelson, S
• Drlica-Wagner, A
• Eckert, K
• Eifler, T F
• Elvin-Poole, J
• Everett, S
• Fang, X
• Fosalba, P
• Gruen, D
• Gruendl, R A
• Harrison, I
• Hartley, W G
• Huang, H
• Huff, E M
• Kuropatkin, N
• MacCrann, N
• McCullough, J
• Myles, J
• Krause, E
• Porredon, A
• Rodriguez-Monroy, M
• Rykoff, E S
• Secco, L F
• Sheldon, E
• Troxel, M A
• Yanny, B
• Yin, B
• Zhang, Y
• Zuntz, J
• Abbott, T M C
• Aguena, M
• Allam, S
• Andrade-Oliveira, F
• Bertin, E
• Bocquet, S
• Brooks, D
• Burke, D L
• Carretero, J
• Castander, F J
• Cawthon, R
• Conselice, C
• Costanzi, M
• Pereira, M E S
• Desai, S
• Doel, P
• Doux, C
• Ferrero, I
• Flaugher, B
• Frieman, J
• García-Bellido, J
• Gutierrez, G
• Herner, K
• Hinton, S R
• Hollowood, D L
• Honscheid, K
• James, D J
• Kuehn, K
• Marshall, J L
• Mena-Fernández, J
• Menanteau, F
• Miquel, R
• Ogando, R L C
• Palmese, A
• Paz-Chinchón, F
• Pieres, A
• Malagón, A A Plazas
• Sanchez, E
• Scarpine, V
• Schubnell, M
• Smith, M
• Suchyta, E
• Tarle, G
• Thomas, D
• To, C

Titel

The Dark Energy Survey Year 3 high-redshift sample: selection, characterization, and analysis of galaxy clustering

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2023-09, Vol.525 (3), p.3896-3922

Ort / Verlag

United States: Oxford University Press

Erscheinungsjahr

2023

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• ABSTRACT The fiducial cosmological analyses of imaging surveys like DES typically probe the Universe at redshifts z < 1. We present the selection and characterization of high-redshift galaxy samples using DES Year 3 data, and the analysis of their galaxy clustering measurements. In particular, we use galaxies that are fainter than those used in the previous DES Year 3 analyses and a Bayesian redshift scheme to define three tomographic bins with mean redshifts around z ∼ 0.9, 1.2, and 1.5, which extend the redshift coverage of the fiducial DES Year 3 analysis. These samples contain a total of about 9 million galaxies, and their galaxy density is more than 2 times higher than those in the DES Year 3 fiducial case. We characterize the redshift uncertainties of the samples, including the usage of various spectroscopic and high-quality redshift samples, and we develop a machine-learning method to correct for correlations between galaxy density and survey observing conditions. The analysis of galaxy clustering measurements, with a total signal to noise S/N ∼ 70 after scale cuts, yields robust cosmological constraints on a combination of the fraction of matter in the Universe Ωm and the Hubble parameter h, $\Omega _m h = 0.195^{+0.023}_{-0.018}$, and 2–3  per cent measurements of the amplitude of the galaxy clustering signals, probing galaxy bias and the amplitude of matter fluctuations, bσ8. A companion paper (in preparation) will present the cross-correlations of these high-z samples with cosmic microwave background lensing from Planck and South Pole Telescope, and the cosmological analysis of those measurements in combination with the galaxy clustering presented in this work.