| Issue |
A&A
Volume 670, February 2023
|
|
|---|---|---|
| Article Number | L15 | |
| Number of page(s) | 6 | |
| Section | Letters to the Editor | |
| DOI | https://doi.org/10.1051/0004-6361/202245331 | |
| Published online | 08 February 2023 | |
Letter to the Editor
Gravity in the local Universe: Density and velocity fields using CosmicFlows-4
1
Université Claude Bernard Lyon 1, IUF, IP2I Lyon, 69622 Villeurbanne, France
e-mail: helene.courtois@univ-lyon1.fr
2
Korea Institute for Advanced Study, 85, Hoegi-ro, Dongdaemun-gu, Seoul 02455, Republic of Korea
Received:
30
October
2022
Accepted:
23
January
2023
This article publicly releases 3D reconstructions of the local Universe gravitational field below z = 0.8 that were computed using the CosmicFlows-4 (CF4) catalog of 56 000 galaxy distances and its subsample of 1008 supernovae distances. The article also provides measurements of the growth rate of structure using the pairwise correlation of radial peculiar velocities fσ8 = 0.38(±0.04) (ungrouped CF4), fσ8 = 0.36(±0.05) (grouped CF4), fσ8 = 0.30(±0.06) (supernovae), and of the bulk flow in the 3D-reconstructed local Universe 230 ± 136 km s1 at 300 h100−1 Mpc of distance from thes observer. The exploration of 10 000 reconstructions has led to the conclusion that the distances delivered by the CF4 catalog are compatible with a Hubble constant of H0 = 74.5 ± 0.1 (grouped CF4), H0 = 75.0 ± 0.35 (ungrouped CF4), and H0 = 75.5 ± 0.95 (CF4 supernovae subsample).
Key words: large-scale structure of Universe / cosmology: observations
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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