2023MNRAS.523.1364Y

Query : 2023MNRAS.523.1364Y

2023MNRAS.523.1364Y - Mon. Not. R. Astron. Soc., 523, 1364-1372 (2023/July-3)

More relaxed intracluster gas than galaxies in clusters in quasi-equilibrium.

YUAN Z.S., HAN J.L., BOHRINGER H., WEN Z.L. and CHON G.

Abstract (from CDS):

During cluster mergers, the intracluster gas and member galaxies undergo dynamic evolution, but at different time-scales and reach different states. We collect 24 galaxy clusters in quasi-equilibrium state as indicated by the X-ray image, and calculate the cluster orientations and three kinds of dynamical parameters, i.e. the normalized centroid offset, the sphere index, and the ellipticity, for these clusters from the distributions of member galaxies and also the intracluster gas. We find consistent alignments for the orientations estimated from the two components. However, the three kinds of dynamical parameters indicated by member galaxies are systematically larger than those derived from the gas component, suggesting that the gas component is more relaxed than member galaxies. Differences of dynamical features between the intracluster gas and member galaxies are independent of cluster mass and concentration. We conclude that the intracluster gas reaches the dynamic equilibrium state earlier than the almost-collisionless member galaxies.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

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

Simbad objects: 25

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Number of rows : 25
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 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
2 ACO 291 ClG 02 01 42.9 -02 11 48           ~ 72 0
3 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 389 0
4 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
5 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 196 0
6 ACO 598 ClG 07 50 52 +17 39.3           ~ 11 0
7 ACO 795 ClG 09 24 11.26 +14 09 03.5           ~ 120 0
8 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
9 ZwCl 1023+1257 ClG 10 25 55.9 +12 41 07           ~ 54 0
10 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 325 0
11 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
12 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
13 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
14 ACO 1902 ClG 14 21 39.7 +37 17 43           ~ 67 0
15 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
16 ACO 2009 ClG 15 00 15.2 +21 22 09           ~ 113 0
17 [VV2006] J150407.5-024816 Bla 15 04 07.51896914 -02 48 16.6232484   18.53 18.08     ~ 60 2
18 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
19 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 756 1
20 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 414 2
21 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
22 ACO 2244 ClG 17 02 40.33 +34 02 58.7           ~ 301 0
23 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 284 0
24 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 370 0
25 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 308 0

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