2024A&A...689A.332A

Query : 2024A&A...689A.332A

2024A&A...689A.332A - Astronomy and Astrophysics, volume 689A332 (2024/9-1)

Dissecting a miniature universe: A multi-wavelength view of galaxy quenching in the Shapley supercluster.

AGHANIM N., TUOMINEN T., BONJEAN V., GOUIN C., BONNAIRE T. and EINASTO M.

Abstract (from CDS):

Multiple cluster systems, that is superclusters, contain large numbers of galaxies assembled in clusters interconnected by multi-scale filamentary networks. As such, superclusters are a smaller version of the cosmic web and can hence be considered as miniature universes. In addition to the galaxies, superclusters also contain gas, which is hot in the clusters and warmer in the filaments. Therefore, they are ideal laboratories to study the interplay between the galaxies and the gas. In this context, the Shapley supercluster (SSC) stands out since it hosts the highest number of galaxies in the local Universe with clusters interconnected by filaments. In addition, it is detected both in X-rays and via the thermal Sunyaev-Zel'dovich (tSZ) effect, making it ideal for a multi-wavelength study of the gas and galaxies. Applying for the first time a filament-finder based on graphs, T-REx, on a spectroscopic galaxy catalogue, we uncovered the 3D filamentary network in and around SSC. Simultaneously, we used a large sample of photometric galaxies with information on their star formation rates (SFRs) in order to investigate the quenching of star formation in the SSC environment which we define as a function of the gas distribution in the Planck tSZ map and the ROSAT X-ray map. With T-REx, we confirm filaments already observed in the distribution of galaxies of the SSC, and we detect new ones. We observe the quenching of star formation as a function of the gas contained in the SSC. We show a general trend of decreasing SFR where the tSZ and X-ray signals are the highest, within the high density environments of the SSC. Within these regions, we also observe a rapid decline in the number of star-forming galaxies, coinciding with an increasing number of transitioning and passive galaxies. Within the SSC filaments, the fraction of passive galaxies is larger than outside filaments, irrespective of the gas pressure. Our results suggest that the zone of influence of the SSC in which galaxies are pre-processed and quenched is well defined by the tSZ signal that combines the density and temperature of the environments.

Abstract Copyright: © The Authors 2024

Journal keyword(s): galaxies: evolution - galaxies: clusters: individual: Shapley - large-scale structure of Universe

Simbad objects: 30

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Number of rows : 30
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 Boss Great Wall SCG 10 52 +52.           ~ 20 0
2 NAME Local Supercluster SCG 12 31 +12.4           ~ 566 0
3 ACO 3528 ClG 12 54 18.2 -29 01 16           ~ 166 1
4 ACO 3530 ClG 12 55 36.0 -30 20 49           ~ 109 0
5 ACO 3532 ClG 12 57 19.2 -30 22 13           ~ 185 2
6 ACO 3537 ClG 13 01 01.64 -32 26 20.6           ~ 52 3
7 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 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 3556 ClG 13 24 06.2 -31 39 38           ~ 159 0
13 ACO 1736 ClG 13 26 52.1 -27 06 33           ~ 268 2
14 ACO 3558 ClG 13 28 03.2 -31 31 35           ~ 476 2
15 BAX 202.4458-31.6081 ClG 13 29 47.0 -31 36 29           ~ 80 1
16 ACO 3559 ClG 13 29 53.9 -29 31 29           ~ 74 0
17 ACO S 736 ClG 13 30 59 -28 02.4           ~ 7 0
18 BAX 202.9000-31.8128 ClG 13 31 28.8 -31 49 40           ~ 88 1
19 ACO 3560 ClG 13 32 23.7 -33 08 21           ~ 145 1
20 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
21 SC 1336-31.4 ClG 13 36 19.0 -31 48 00           ~ 5 0
22 ACO 3566 ClG 13 38 59 -35 33.2           ~ 45 0
23 ACO 3570 ClG 13 46 50 -37 55.0           ~ 57 3
24 ACO S 744 ClG 13 47 28 -32 09.0           ~ 5 0
25 ACO 3571 ClG 13 47 32.4 -32 50 12           ~ 308 2
26 ACO 3575 ClG 13 52 35 -32 52.8           ~ 33 0
27 ACO S 748 ClG 13 52 35 -32 23.8           ~ 5 0
28 ACO 3578 ClG 13 57 30 -24 43.6           ~ 23 1
29 NAME CrB Supercluster SCG 15 25 +29.5           ~ 148 0
30 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0

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