2020MNRAS.497...52H

Query : 2020MNRAS.497...52H

2020MNRAS.497...52H - Mon. Not. R. Astron. Soc., 497, 52-66 (2020/September-1)

Shapley supercluster survey: mapping the dark matter distribution.

HIGUCHI Y., OKABE N., MERLUZZI P., HAINES C.P., BUSARELLO G., GRADO A. and MERCURIO A.

Abstract (from CDS):

We present a 23 deg2 weak gravitational lensing survey of the Shapley supercluster core and its surroundings using gri VST images as part of the Shapley Supercluster Survey (ShaSS). This study reveals the overall matter distribution over a region containing 11 clusters at z ∼ 0.048 that are all interconnected, as well as several ongoing cluster-cluster interactions. Galaxy shapes have been measured by using the Kaiser-Squires-Broadhurst method for the g- and r-band images and background galaxies were selected via the gri colour-colour diagram. This technique has allowed us to detect all of the clusters, either in the g- or r-band images, although at different σ levels, indicating that the underlying dark matter distribution is tightly correlated with the number density of the member galaxies. The deeper r-band images have traced the five interacting clusters in the supercluster core as a single coherent structure, confirmed the presence of a filament extending North from the core, and have revealed a background cluster at z ∼ 0.17. We have measured the masses of the four richest clusters (A3556, A3558, A3560, and A3562) in the two-dimensional shear pattern, assuming a spherical Navarro-Frenk-White profile and obtaining a total mass of M_ ShaSS,WL=1.56+0.81^–0.55×1015 M☉, which is consistent with dynamical and X-ray studies. Our analysis provides further evidence of the ongoing dynamical evolution in the ShaSS region.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gravitational lensing: weak - galaxies: clusters: general - dark matter

Simbad objects: 28

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Number of rows : 28
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 ACO 726 ClG 08 58 20 +31 07.4           ~ 12 0
2 ACO 3528 ClG 12 54 18.2 -29 01 16           ~ 166 1
3 ACO 3530 ClG 12 55 36.0 -30 20 49           ~ 109 0
4 ACO 3532 ClG 12 57 19.2 -30 22 13           ~ 185 2
5 ACO S 718 ClG 12 59 44 -33 40.2           ~ 10 0
6 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
7 ACO 3542 ClG 13 08 41 -34 34.0           ~ 25 0
8 ACO S 724 ClG 13 13 17 -32 56.9           ~ 14 0
9 ACO S 726 ClG 13 15.2 -33 39           ~ 19 0
10 ACO 3552 ClG 13 18 53 -31 48.8           ~ 22 0
11 ACO 3554 ClG 13 19 30 -33 28.7           ~ 42 0
12 ACO S 729 ClG 13 21 32 -35 47.7           ~ 16 0
13 ACO S 731 ClG 13 23 01 -34 52.7           ~ 10 0
14 ACO 3556 ClG 13 24 06.2 -31 39 38           ~ 159 0
15 ACO 1736 ClG 13 26 52.1 -27 06 33           ~ 268 2
16 ACO 3558 ClG 13 28 03.2 -31 31 35           ~ 476 2
17 BAX 202.4458-31.6081 ClG 13 29 47.0 -31 36 29           ~ 80 1
18 ACO 3559 ClG 13 29 53.9 -29 31 29           ~ 74 0
19 BAX 202.9000-31.8128 ClG 13 31 28.8 -31 49 40           ~ 88 1
20 ACO 3560 ClG 13 32 23.7 -33 08 21           ~ 145 1
21 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
22 ACO 3564 ClG 13 34 22 -35 13.4           ~ 36 0
23 ACO 3566 ClG 13 38 59 -35 33.2           ~ 45 0
24 ACO 3568 ClG 13 41 11 -34 38.1           ~ 8 0
25 ACO 3572 ClG 13 48 11 -33 22.9           ~ 30 0
26 ACO 3575 ClG 13 52 35 -32 52.8           ~ 33 0
27 ACO 3577 ClG 13 54 20 -27 50.7           ~ 30 0
28 NAME Local Group GrG ~ ~           ~ 9325 0

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