2001ApJ...548...79G

Query : 2001ApJ...548...79G

2001ApJ...548...79G - Astrophys. J., 548, 79-96 (2001/February-2)

Evolution of the internal dynamics of galaxy clusters.

GIRARDI M. and MEZZETTI M.

Abstract (from CDS):

We consider a sample of 51 distant galaxy clusters at 0.15≲z≲0.9 (z∼0.3), each cluster having at least 10 galaxies with available redshift in the literature. We select member galaxies, analyze the velocity dispersion profiles, and evaluate in a homogeneous way cluster velocity dispersions and virial masses. We apply the same procedures already recently applied on a sample of nearby clusters (z<0.15) in order to analyze properly the possible dynamical evolution of galaxy clusters. We remark on problems induced by the poor sampling and the small spatial extension of the sampled cluster region in the computation of velocity dispersion. We do not find any significant difference between nearby and distant clusters. In particular, we consider the galaxy spatial distribution, the shape of the velocity dispersion profile, and the relations between velocity dispersion and X-ray luminosity and temperature. Our results imply little dynamical evolution in the range of redshift spanned by our cluster sample and suggest that the typical redshift of cluster formation is higher than that of the sample we analyze.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Observations - Galaxies: Clusters: General - Galaxies: Distances and Redshifts - X-Rays: Galaxies

Simbad objects: 51

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Number of rows : 51
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 812 0
2 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 502 0
3 ACO S 26 ClG 00 19 03.2448 -20 25 12.583           ~ 24 0
4 ClG 0021+0406 ClG 00 23 52 +04 23.1           ~ 48 0
5 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 635 1
6 ACO 115 ClG 00 55 59.5 +26 19 14           ~ 270 1
7 ClG 0053-37 ClG 00 56 03.5 -37 32 43           ~ 26 0
8 ClG 0055-2754 ClG 00 56 56.8 -27 40 29   21.9       ~ 84 0
9 ACO 140 ClG 01 04 38.1 -23 59 09           ~ 40 0
10 ACO 222 ClG 01 37 31.1 -12 59 30           ~ 140 1
11 ACO 223 ClG 01 37 55.9 -12 49 11           ~ 122 1
12 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 747 0
13 ClG 0302+17 ClG 03 05 19.0 +17 28 38     21.00     ~ 56 0
14 ClG 0303+1658 ClG 03 05 31.6 +17 10 02     20.13     ~ 90 0
15 ClG 0303+17 ClG 03 06 19.0 +17 18 50           ~ 49 0
16 CEMM J2175.23C ClG 03 32 59.300 -39 06 49.70           ~ 6 0
17 CEMM J2175.15TR ClG 03 34 20.0 -38 54 00           ~ 7 0
18 ClG 0412-65 ClG 04 12 51.7 -65 50 17           ~ 45 0
19 ClG 0440+02 ClG 04 43 09.7 +02 10 19     17.03     ~ 125 0
20 CEMM F1652.20CR ClG 04 48 02.2 -20 37 36           ~ 7 0
21 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 249 0
22 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 436 0
23 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 352 0
24 ACO S 506 ClG 05 01 04.4 -24 24 41           ~ 59 0
25 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 963 1
26 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 437 0
27 3C 206 Sy1 08 39 50.5829445936 -12 14 34.327188564   15.78 15.76     ~ 246 0
28 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 327 0
29 ClG 0949+44 ClG 09 52 58.3 +43 54 16     19.40     ~ 20 0
30 ClG 1008-12 ClG 10 10 34.1 -12 39 48     18.0     ~ 152 0
31 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 454 0
32 ACO 1300 ClG 11 32 00.7 -19 53 34           ~ 151 0
33 ClG 1224+20 ClG 12 27 14.9 +19 51 06   19.0       ~ 95 0
34 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1125 0
35 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 361 0
36 3C 295 Sy2 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 979 5
37 ZwCl 1447+2619 ClG 14 49 28.2 +26 07 57           ~ 50 0
38 ClG J1514+3636 ClG 15 14 22.0 +36 36 22     19.0     ~ 136 0
39 ClG 1601+42 ClG 16 03 13.800 +42 45 36.00           ~ 50 0
40 ClG 1603+4313 ClG 16 04 23.7 +43 04 52           ~ 134 1
41 ClG 1621+26 ClG 16 23 35.7 +26 33 50           ~ 142 0
42 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 809 1
43 ClG J1716+6708 ClG 17 16 49.6 +67 08 30           ~ 134 0
44 ACO 3639 ClG 19 28 02 -50 56.9           ~ 14 0
45 ACO S 910 ClG 20 57 22 -64 39.4           ~ 36 0
46 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 688 2
47 ACO 3854 ClG 22 17 45.72 -35 43 31.4           ~ 67 0
48 ACO 3888 ClG 22 34 23.0 -37 43 29           ~ 138 1
49 ACO 3889 ClG 22 34 48.40 -30 33 28.3           ~ 15 0
50 ACO S 1077 ClG 22 58 52.34 -34 46 54.6           ~ 188 0
51 CEMM F1637.23TL ClG 23 59 16.6 -32 17 20           ~ 6 0

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