2018MNRAS.478.5473L

Query : 2018MNRAS.478.5473L

2018MNRAS.478.5473L - Mon. Not. R. Astron. Soc., 478, 5473-5490 (2018/August-3)

Optical substructure and BCG offsets of Sunyaev-Zel'dovich and X-ray-selected galaxy clusters.

LOPES P.A.A., TREVISAN M., LAGANA T.F., DURRET F., RIBEIRO A.L.B. and REMBOLD S.B.

Abstract (from CDS):

We used optical imaging and spectroscopic data to derive substructure estimates for local Universe (z < 0.11) galaxy clusters from two different samples. The first was selected through the Sunyaev-Zel'dovich (SZ) effect by the Planck satellite, and the second is an X-ray-selected sample. In agreement to X-ray substructure estimates, we found that the SZ systems have a larger fraction of substructure than the X-ray clusters. We have also found evidence that the higher mass regime of the SZ clusters, compared to the X-ray sample, explains the larger fraction of disturbed objects in the Planck data. Although we detect a redshift evolution in the substructure fraction, it is not sufficient to explain the different results between the higher-z SZ sample and the X-ray one. We have also verified a good agreement (∼60per cent) between the optical and X-ray substructure estimates. However, the best level of agreement is given by the substructure classification given by measures based on the brightest cluster galaxy (BCG), either the BCG-X-ray centroid offset, or the magnitude gap between the first and second BCGs. We advocate the use of those two parameters as the most reliable and cheap way to assess cluster dynamical state. We recommend an offset cut-off ∼0.01 x R500 to separate relaxed and disturbed clusters. Regarding the magnitude gap, the separation can be done at Δm12 = 1.0. The central galaxy paradigm (CGP) may not be valid for ∼20per cent of relaxed massive clusters. This fraction increases to ∼60per cent for disturbed systems.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

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

VizieR on-line data: <Available at CDS (J/MNRAS/478/5473): tablea1.dat tablea2.dat>

Simbad objects: 64

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Number of rows : 64
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 2734 ClG 00 11 21.60 -28 51 16.6           ~ 156 0
2 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
3 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 577 2
4 ACO 193 ClG 01 25 07.3 +08 41 36           ~ 192 0
5 ClG 0422-09 ClG 04 25 51.02 -08 33 38.5           ~ 97 0
6 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
7 ACO S 540 ClG 05 40 06.2 -40 50 29           ~ 60 0
8 CAN 35 ClG 05 48.6 -25 28           ~ 8 1
9 ACO 3376 ClG 06 01 25.000 -39 59 51.00           ~ 334 0
10 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 222 1
11 ACO 3395 ClG 06 27 31.1 -54 23 58           ~ 229 0
12 ACO 754 ClG 09 09 14.8 -09 40 35           ~ 695 1
13 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
14 ACO 1066 ClG 10 39 28.53 +05 11 01.2           ~ 96 1
15 NAME NGC 3411 Group GrG 10 50 26.9 -12 50 26           ~ 50 0
16 ACO 1190 ClG 11 11 43.83 +40 51 43.5           ~ 145 0
17 ACO 1307 ClG 11 32 42.59 +14 26 16.3           ~ 100 0
18 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
19 ZwCl 1215+0400 ClG 12 17 43.62 +03 38 51.5           ~ 169 0
20 BAX 193.5900-29.0100 ClG 12 54 22.1 -29 00 46           ~ 45 0
21 BAX 193.6700-29.2254 ClG 12 54 40.6 -29 13 44           ~ 76 0
22 ACO 1644 ClG 12 57 11.6 -17 24 34           ~ 391 1
23 ACO 3532 ClG 12 57 19.2 -30 22 13           ~ 185 2
24 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 325 0
25 ACO 1651 ClG 12 59 27.3 -04 10 49           ~ 307 0
26 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
27 NAME Shapley Supercluster SCG 13 06.0 -33 04           ~ 677 0
28 ACO 1736 ClG 13 26 52.1 -27 06 33           ~ 268 2
29 ACO 3558 ClG 13 28 03.2 -31 31 35           ~ 476 2
30 ACO 3560 ClG 13 32 23.7 -33 08 21           ~ 145 1
31 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
32 ACO 1767 ClG 13 36 06.92 +59 10 34.3           ~ 182 0
33 ACO 1775 ClG 13 41 50.60 +26 21 10.6           ~ 324 0
34 ACO 3571 ClG 13 47 32.4 -32 50 12           ~ 308 2
35 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
36 ACO 1831 ClG 13 59 19.42 +27 58 08.2           ~ 166 0
37 ACO 1942 ClG 14 38 21.8673 +03 40 13.247           ~ 122 0
38 BAX 220.1796+03.4530 ClG 14 40 34.37 +03 29 49.7     14.31     ~ 131 0
39 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
40 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 756 1
41 ACO 2061 ClG 15 21 19.90 +30 37 13.0           ~ 214 1
42 ACT-CL J1521.8+0742 ClG 15 21 48.8 +07 43 41     15.13     ~ 326 0
43 ACO 2065 ClG 15 22 22.7 +27 44 20           ~ 398 0
44 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 414 2
45 ACO 2107 ClG 15 39 39.04 +21 46 57.8           ~ 270 0
46 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
47 ACO 2147 ClG 16 02 11.96 +15 55 11.5           ~ 416 0
48 AWM 4 ClG 16 04 52.01 +23 56 26.9     14.38     ~ 141 0
49 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
50 ACO 2175 ClG 16 20 30.70 +29 53 31.2           ~ 133 0
51 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
52 ACO 2244 ClG 17 02 40.33 +34 02 58.7           ~ 301 0
53 ACO 2249 ClG 17 09 36.76 +34 28 04.1           ~ 136 0
54 ACO 2255 ClG 17 12 56.0 +64 04 06           ~ 605 0
55 NGC 6338 Bla 17 15 22.9842192344 +57 24 40.346559927   14.2   8   ~ 205 2
56 ACO 3716 ClG 20 51 16.7 -52 41 43           ~ 123 1
57 ACO 2457 ClG 22 35 40.30 +01 31 33.6           ~ 139 0
58 ACO 2572 ClG 23 18 31.2 +18 41 52           ~ 142 1
59 ACO 2593 ClG 23 24 27.15 +14 33 40.2           ~ 231 0
60 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0
61 ACO 2626 ClG 23 36 31.0 +21 09 36           ~ 265 0
62 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 349 3
63 ACO 2665 ClG 23 50 50.6 +06 09 00           ~ 106 0
64 ACO 4059 ClG 23 57 02.2 -34 45 58           ~ 400 1

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