Gravity in the local Universe: Density and velocity fields using CosmicFlows-4
H. M. Courtois, Alexandra Dupuy, D. Guinet, G. Baulieu, F. Ruppin, P. Brenas
Abstract
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 fσ 8 = 0.38(±0.04) (ungrouped CF4), fσ 8 = 0.36(±0.05) (grouped CF4), fσ 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).