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- W3099283521 abstract "In this paper, we develop a full statistical method for the pairwise velocity estimator previously proposed, and apply Cosmicflows-2 catalogue to this method to constrain cosmology. We first calculate the covariance matrix for line-of-sight velocities for a given catalogue, and then simulate the mock full-sky surveys from it, and then calculate the variance for the pairwise velocity field. By applying the $8315$ independent galaxy samples and compressed $5224$ group samples from Cosmicflows-2 catalogue to this statistical method, we find that the joint constraint on $Omega^{0.6}_{rm m}h$ and $sigma_{8}$ is completely consistent with the WMAP 9-year and Planck 2015 best-fitting cosmology. Currently, there is no evidence for the modified gravity models or any dynamic dark energy models from this practice, and the error-bars need to be reduced in order to provide any concrete evidence against/to support $Lambda$CDM cosmology." @default.
- W3099283521 created "2020-11-23" @default.
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- W3099283521 date "2015-10-27" @default.
- W3099283521 modified "2023-10-15" @default.
- W3099283521 title "Constraining cosmology with pairwise velocity estimator" @default.
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- W3099283521 doi "https://doi.org/10.1051/0004-6361/201526051" @default.
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