http://arxiv.org/abs/1901.03530
This article explores three usual estimators, noted as $v_{12}$, $\psi_1$ and $\psi_2$, of the observed two-point galaxy peculiar velocity correlation functions. These estimators are tested on mock samples of Cosmicflows-3 dataset (Tully et al. 2016) , derived from a numerical cosmological simulation, and also on a number of constrained realizations of this dataset. Observational measurements errors and cosmic variance are taken into consideration in the study. The result is a local measurement of $f \sigma_8 = 0.43 \left( \pm 0.03 \right)\mathrm{obs} \left( \pm 0.11 \right)\mathrm{cosmic}$ out to $z=0.05$, in support of a $\Lambda$CDM cosmology.
A. Dupuy, H. Courtois, R. Graziani, et. al.
Mon, 14 Jan 19
17/43
Comments: 9 pages, 6 figures, submitted since Feb 9 2018 to MNRAS, currently under third revision
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