2023A&A...678A.176D

Query : 2023A&A...678A.176D

2023A&A...678A.176D - Astronomy and Astrophysics, volume 678A176 (2023/10-1)

Dynamic cosmography of the local Universe: Laniakea and five more watershed superclusters.

DUPUY A. and COURTOIS H.M.

Abstract (from CDS):

This article delivers the dynamical cosmography of the local Universe within z = 0.1 (1 giga light-years). We exploited the gravitational velocity field computed using the CosmicFlows-4 catalog of galaxy distances in order to delineate superclusters as watersheds, publishing for the first time their size, shape, main streams of matter, and the location of their central attractor. We confirm the size of Laniakea, our home supercluster, to be 2 × 106 (Mpc h–1)3. We dynamically define five more known superclusters in the same way as Laniakea: Apus, Hercules, Lepus, Perseus-Pisces, and Shapley. Additionally, we found the central repellers of the Bootes and Sculptor voids, and based on our analysis, the Dipole and Cold Spot repellers appear as a single gigantic entity. Interestingly, the observed superclusters are an order of magnitude larger than the theoretical ones predicted by cosmological ΛCDM simulations.

Abstract Copyright: © The Authors 2023

Journal keyword(s): large-scale structure of Universe

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME PSC-CET SUPERCL SCG 00 33 -21.0           ~ 67 2
2 NAME Psc-Per Supercluster SCG 02 33.2 +41 37           ~ 444 1
3 NAME the Cold Spot ? 03 13 -20.5           ~ 52 0
4 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
5 NAME LEP SUPERCL SCG 05 54.4 -28 05           ~ 18 0
6 NAME Great Attractor SCG 10 32 -46.0           ~ 617 0
7 NAME Vela Supercluster SCG 10 53.0 +02 44           ~ 54 0
8 NAME Coma Supercluster SCG 11 23 +23.9           ~ 291 0
9 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
10 ACO 3570 ClG 13 46 50 -37 55.0           ~ 57 3
11 ACO 3575 ClG 13 52 35 -32 52.8           ~ 33 0
12 NAME Bootes Void vid 14 52 +45.8           ~ 91 0
13 NAME Hercules Supercluster SCG 15 47 +18.2           ~ 166 1
14 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
15 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
16 NAME Scl Void vid ~ ~           ~ 25 0
17 NAME Laniakea Supercluster SCG ~ ~           ~ 61 0

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