期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 467, 期 4, 页码 3993-4014出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx178
关键词
methods: numerical; catalogues; galaxies: statistics; cosmology: theory; large-scale structure of Universe
资金
- Friedrich-Ebert-Foundation
- Uros Seljak for the hospitality at LBNL
- UC Berkeley
- Instituto de Fisica Teorica (IFT UAM-CSIC) in Madrid
- Centro de Excelencia Severo Ochoa Program [SEV-2012-0249]
- LBNL
- Spanish MICINN's Consolider-Ingenio Programme under grant MultiDark [CSD2009-00064, AYA2010-21231-C02-01]
- Comunidad de Madrid [HEPHACOSS2009/ESP-1473]
- MINECO (Spain) [AYA2012-31101, AYA2015-63810-P]
- Spanish MultiDark Consolider [CSD2009-00064]
- PRACE [2012060963]
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy Office of Science
- Science and Technology Facilities Council [ST/N000668/1] Funding Source: researchfish
- UK Space Agency [ST/N00180X/1] Funding Source: researchfish
- STFC [ST/K004719/1, ST/N000668/1] Funding Source: UKRI
We present a Bayesian phase-space reconstruction of the cosmic large-scale matter density and velocity fields from the Sloan Digital Sky Survey-III Baryon Oscillations Spectroscopic Survey Data Release 12 CMASS galaxy clustering catalogue. We rely on a given Lambda cold dark matter cosmology, a mesh resolution in the range of 6-10 h(-1) Mpc, and a lognormal-Poisson model with a redshift-dependent non-linear bias. The bias parameters are derived from the data and a general renormalized perturbation theory approach. We use combined Gibbs and Hamiltonian sampling, implemented in the ARGO code, to iteratively reconstruct the darkmatter density field and the coherent peculiar velocities of individual galaxies, correcting hereby for coherent redshift space distortions. Our tests relying on accurate N-body-based mock galaxy catalogues show unbiased real space power spectra of the non-linear density field up to k similar to 0.2 h Mpc(-1), and vanishing quadrupoles down to r similar to 20 h(- 1) Mpc. We also demonstrate that the non- linear cosmic web can be obtained from the tidal field tensor based on the Gaussian component of the reconstructed density field. We find that the reconstructed velocities have a statistical correlation coefficient compared to the true velocities of each individual lightcone mock galaxy of r similar to 0.68 including about 10 per cent of satellite galaxies with virial motions (about r = 0.75 without satellites). The power spectra of the velocity divergence agree well with theoretical predictions up to k similar to 0.2 h Mpc(-1). This work will be especially useful to improve, for example, baryon acoustic oscillation reconstructions, kinematic SunyaevZeldovich, integrated Sachs-Wolfe measurements or environmental studies.
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