2008ApJ...676..218H

Query : 2008ApJ...676..218H

2008ApJ...676..218H - Astrophys. J., 676, 218-247 (2008/March-3)

Galaxy orbits for galaxy clusters in the Sloan Digital Sky Survey and Two Degree Field Galaxy Redshift Survey.

HWANG H.S. and LEE M.G.

Abstract (from CDS):

We present the results of a study for galaxy orbits in galaxy clusters using a spectroscopic sample of galaxies in SDSS and 2dFGRS. We have determined the member galaxies of Abell clusters covered by these surveys using the galaxies' redshift and positional data. We have selected 10 clusters using three criteria: the number of member galaxies is greater than or equal to 40, the spatial coverage is complete, and the X-ray mass profile is available in the literature. We derive the radial profile of the galaxy number density and velocity dispersion using all, early-type, and late-type galaxies for each cluster. We have investigated the galaxy orbits for our sample clusters with constant and variable velocity anisotropies over the clustercentric distance using the Jeans equation. Using all member galaxies, the galaxy orbits are found to be isotropic within the uncertainty for most of the sample clusters, although it is difficult to conclude strongly for some clusters due to the large errors and the variation as a function of the clustercentric distance in the calculated velocity anisotropies. We investigated the orbital difference between early-type and late-type galaxies for four sample clusters and found no significant difference between them.

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Journal keyword(s): Galaxies: Clusters: General - Galaxies: Clusters: Individual: Alphanumeric: A85 - galaxies: clusters: individual (A779) - galaxies: clusters: individual (A1650) - galaxies: clusters: individual (A1651) - Galaxies: Clusters: Individual: Alphanumeric: A1795 - galaxies: clusters: individual (A1800) - Galaxies: Clusters: Individual: Alphanumeric: A2034 - Galaxies: Clusters: Individual: Alphanumeric: A2199 - galaxies: clusters: individual (A2670) - galaxies: clusters: individual (A2734) - Galaxies: Kinematics and Dynamics

Simbad objects: 29

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Number of rows : 29
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 87 ClG 00 43 01 -09 47.6           ~ 46 0
4 ACO 89 ClG 00 43 07.7 -09 26 34           ~ 22 0
5 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 577 2
6 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
7 ACO 576 ClG 07 21 24.1 +55 44 20           ~ 312 1
8 NGC 2832 LIN 09 19 46.853 +33 44 59.07   13.3 13.17     ~ 274 3
9 ACO 779 ClG 09 20 02.70 +33 45 29.7           ~ 261 0
10 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 325 0
11 ACO 1651 ClG 12 59 27.3 -04 10 49           ~ 307 0
12 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
13 ACO 1775 ClG 13 41 50.60 +26 21 10.6           ~ 324 0
14 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
15 ACO 1800 ClG 13 49 27.19 +28 04 44.6           ~ 127 0
16 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 370 0
17 NAME BOO SUPERCL SCG 14 01.5 +25 09           ~ 32 1
18 ACO 2034 ClG 15 10 03.9 +33 30 57           ~ 248 1
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 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
22 ACO 2147 ClG 16 02 11.96 +15 55 11.5           ~ 416 0
23 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
24 ACO 2244 ClG 17 02 40.33 +34 02 58.7           ~ 301 0
25 ACO 2255 ClG 17 12 56.0 +64 04 06           ~ 605 0
26 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2
27 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 349 3
28 ACO 2670 ClG 23 54 10.51 -10 23 06.8           ~ 364 0
29 ACO 4059 ClG 23 57 02.2 -34 45 58           ~ 400 1

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