2021A&A...647A...4G


Query : 2021A&A...647A...4G

2021A&A...647A...4G - Astronomy and Astrophysics, volume 647A, 4-4 (2021/3-1)

Discovery of a supercluster in the eROSITA Final Equatorial Depth Survey: X-ray properties, radio halo, and double relics.

GHIRARDINI V., BULBUL E., HOANG D.N., KLEIN M., OKABE N., BIFFI V., BRUGGEN M., RAMOS-CEJA M.E., COMPARAT J., OGURI M., SHIMWELL T.W., BASU K., BONAFEDE A., BOTTEON A., BRUNETTI G., CASSANO R., DE GASPERIN F., DENNERL K., GATUZZ E., GASTALDELLO F., INTEMA H., MERLONI A., NANDRA K., PACAUD F., PREDEHL P., REIPRICH T.H., ROBRADE J., ROTTGERING H., SANDERS J., VAN WEEREN R.J. and WILLIAMS W.L.

Abstract (from CDS):


Aims. We examine the X-ray, optical, and radio properties of the member clusters of a new supercluster discovered during the SRG/eROSITA Performance Verification phase.
Methods. We analyzed the 140deg2 eROSITA Final Equatorial Depth Survey (eFEDS) field observed during the Performance Verification phase to a nominal depth of about 2.3ks. In this field, we detect a previously unknown supercluster consisting of a chain of eight galaxy clusters at z∼0.36. The redshifts of these members were determined through Hyper Suprime-Cam photometric measurements. We examined the X-ray morphological and dynamical properties, gas, and total mass out to R500 of the members and compare these with the same properties of the general population of clusters detected in the eFEDS field. We further investigated the gas in the bridge region between the cluster members for a potential WHIM detection. We also used radio follow-up observations with LOFAR and uGMRT to search for diffuse emission and constrain the dynamic state of the system.
Results. We do not find significant differences between the morphological parameters and properties of the intra-cluster medium of the clusters embedded in this large-scale filament and those of the eFEDS clusters. We also provide upper limits on the electron number density and mass of the warm-hot intergalactic medium as provided by the eROSITA data. These limits are consistent with previously reported values for the detections in the vicinity of clusters of galaxies. In LOFAR and uGMRT follow-up observations of the northern part of this supercluster, we find two new radio relics and a radio halo that are the result of major merger activity in the system.
Conclusions. These early results show the potential of eROSITA to probe large-scale structures such as superclusters and the properties of their members. Our forecasts show that we will be able to detect about 450 superclusters, with approximately 3000 member clusters located in the eROSITA_DE region at the final eROSITA all-sky survey depth, enabling statistical studies of the properties of superclusters and their constituents embedded in the cosmic web.

Abstract Copyright: © V. Ghirardini et al. 2021

Journal keyword(s): galaxies: clusters: intracluster medium - galaxies: clusters: general - X-rays: galaxies: clusters - intergalactic medium

Nomenclature: [GBH2021] Supercluster N=1. Fig. 6, Table 6: [GBH2021] RSE N=1, [GBH2021] RNE N=1, [GBH2021] A (Nos A-E).

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 652 0
2 ACO 133 ClG 01 02 39.0 -21 57 15           ~ 351 1
3 ACO 222 ClG 01 37 27.4 -12 58 45           ~ 131 1
4 ACO 223 ClG 01 37 55.9 -12 49 11           ~ 117 1
5 ClG 0217+70 ClG 02 17 00.0 +70 36 00           ~ 21 0
6 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 373 0
7 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 540 0
8 NAME MS 0302+17 Supercluster SCG 03 05 26.0 +17 17 54           ~ 7 0
9 ACO 520 ClG 04 54 19.0 +02 56 49           ~ 406 0
10 ICRF J054236.1+495107 Sy1 05 42 36.1380355416 +49 51 07.232213736   18.45 17.80 17.210   ~ 1393 1
11 ClG J0603.3+4214 ClG 06 03.3 +42 14           ~ 113 0
12 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 185 1
13 ACO 3395 ClG 06 27 31.1 -54 23 58           ~ 193 0
14 3C 196 Sy1 08 13 36.0561170112 +48 13 02.644966020   18.36 17.79     ~ 515 2
15 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 417 0
16 eFEDS J093432.2-002303 ClG 09 34 31.1 -00 23 07           ~ 4 0
17 eFEDS J093501.1+005418 ClG 09 35 00.5 +00 54 06           ~ 3 0
18 eFEDS J093510.7+004910 ClG 09 35 10.7 +00 49 10           ~ 1 0
19 [GBH2021] Supercluster SCG 09 35 +00.5           ~ 1 0
20 [GBH2021] A Rad 09 35 12.3 +00 47 40           ~ 1 0
21 eFEDS J093513.3+004746 ClG 09 35 13.3 +00 47 47           ~ 1 0
22 [GBH2021] B Rad 09 35 13.8 +00 47 15           ~ 1 0
23 [GBH2021] C Rad 09 35 15.0 +00 47 54           ~ 1 0
24 PSZ2 G233.68+36.14 C?G 09 35 15.2 +00 47 46           ~ 5 0
25 [GBH2021] E Rad 09 35 15.3 +00 45 44           ~ 1 0
26 [GBH2021] RN Rad 09 35 15.6 +00 50 01           ~ 1 0
27 [GBH2021] D Rad 09 35 16.2 +00 48 00           ~ 1 0
28 eFEDS J093520.8+003445 ClG 09 35 19.4 +00 34 38           ~ 3 0
29 [GBH2021] RSE Rad 09 35 24.5 +00 45 53           ~ 1 0
30 eFEDS J093543.9-000334 ClG 09 35 43.9 -00 03 35           ~ 1 0
31 eFEDS J093546.4-000115 ClG 09 35 46.4 -00 01 15           ~ 1 0
32 eFEDS J093612.6+001651 ClG 09 36 12.7 +00 16 53           ~ 4 0
33 NAME SHAPLEY-CENTAURUS CL SCG 13 06.0 -33 04           ~ 556 0
34 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1072 0
35 ACO 1750 ClG 13 30 49.94 -01 52 22.1           ~ 158 1
36 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4095 2
37 NAME ACO 1758S ClG 13 32 32.8 +50 24 48           ~ 53 0
38 NAME ACO 1758N ClG 13 32 44.8 +50 32 24           ~ 88 0
39 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 295 1
40 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 657 1
41 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 947 5
42 ACO 2163 ClG 16 15 34.1 -06 07 26           ~ 543 0
43 ACO 2256 ClG 17 03 43.5 +78 43 03           ~ 855 1
44 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 533 0
45 MCS J1752.0+4440 ClG 17 52 03.1 +44 40 10           ~ 51 0
46 NAME Sausage Cluster ClG 22 42 53.0 +53 01 05           ~ 189 0
47 PSZ1 G108.18-11.53 ClG 23 22 28.2499 +48 44 29.172           ~ 25 0

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2022.08.11-19:03:24

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