Gravity in the local Universe: Density and velocity fields using CosmicFlows-4

被引：17
作者：
Courtois, H. M. [1 ]
Dupuy, A. [2 ]
Guinet, D. [1 ]
Baulieu, G. [1 ]
Ruppin, F. [1 ]
Brenas, P. [1 ]
机构：
[1] Univ Claude Bernard Lyon 1, IUF, IP2I Lyon, F-69622 Villeurbanne, France
[2] Korea Inst Adv Study, 85 Hoegi Ro, Seoul 02455, South Korea
来源：
ASTRONOMY & ASTROPHYSICS | 2023年 / 670卷
关键词：
large-scale structure of Universe; cosmology; observations; PECULIAR VELOCITIES; NEARBY UNIVERSE; COSMIC FLOWS; GROWTH-RATE; BULK FLOW;
D O I：
10.1051/0004-6361/202245331
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 f sigma(8) = 0.38(+/- 0.04) (ungrouped CF4), f sigma(8) = 0.36(+/- 0.05) (grouped CF4), f sigma(8) = 0.30(+/- 0.06) (supernovae), and of the bulk flow in the 3D-reconstructed local Universe 230 +/- 136 km s(1) at 300 h(100)(-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 H-0 = 74.5 +/- 0.1 (grouped CF4), H-0 = 75.0 +/- 0.35 (ungrouped CF4), and H-0 = 75.5 +/- 0.95 (CF4 supernovae subsample).
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