2006AJ....132.1275R

Query : 2006AJ....132.1275R

2006AJ....132.1275R - Astron. J., 132, 1275-1297 (2006/September-0)

CIRS: cluster infall regions in the Sloan Digital Sky Survey. I. Infall patterns and mass profiles.

RINES K. and DIAFERIO A.

Abstract (from CDS):

We use the Fourth Data Release of the Sloan Digital Sky Survey (SDSS) to test the ubiquity of infall patterns around galaxy clusters and measure cluster mass profiles to large radii. The Cluster and Infall Region Nearby Survey (CAIRNS) found infall patterns in nine clusters, but the cluster sample was incomplete. Here we match X-ray cluster catalogs with SDSS, search for infall patterns, and compute mass profiles for a complete sample of X-ray-selected clusters. Very clean infall patterns are apparent in most of the clusters, with the fraction decreasing with increasing redshift due to shallower sampling. All 72 clusters in a well-defined sample limited by redshift (ensuring good sampling) and X-ray flux (excluding superpositions) show infall patterns sufficient to apply the caustic technique. This sample is by far the largest sample of cluster mass profiles extending to large radii to date. Similar to CAIRNS, cluster infall patterns are better defined in observations than in simulations. Further work is needed to determine the source of this difference. We use the infall patterns to compute mass profiles for 72 clusters and compare them to model profiles. Cluster scaling relations using caustic masses agree well with those using X-ray or virial mass estimates, confirming the reliability of the caustic technique. We confirm the conclusion of CAIRNS that cluster infall regions are well fitted by Navarro-Frenk-White (NFW) and Hernquist profiles and poorly fitted by singular isothermal spheres. This much larger sample enables new comparisons of cluster properties with those in simulations. The shapes (specifically NFW concentrations) of the mass profiles agree well with the predictions of simulations. The mass in the infall region is typically comparable to or larger than that in the virial region. Specifically, the mass inside the turnaround radius is on average 2.19±0.18 times that within the virial radius. This ratio agrees well with recent predictions from simulations of the final masses of dark matter halos.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Observations - Galaxies: Clusters: General - Galaxies: Kinematics and Dynamics

VizieR on-line data: <Available at CDS (J/AJ/132/1275): table1.dat table3.dat table4.dat table5.dat table6.dat>

Simbad objects: 79

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Number of rows : 79
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 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 648 1
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 160 ClG 01 12 59.98 +15 30 05.3           ~ 181 0
5 ACO 168 ClG 01 15 07.58 +00 19 10.8           ~ 379 2
6 BAX 024.3000-09.1833 ClG 01 37 13.37 -09 11 13.6           ~ 37 0
7 ACO 295 ClG 02 02 27 -01 04.6           ~ 67 0
8 ACO 602 ClG 07 53 23.51 +29 20 20.3           ~ 80 0
9 ZwCl 0820+0436 ClG 08 23 05.35 +04 21 48.2           ~ 31 0
10 ACO 671 ClG 08 28 48.68 +30 27 07.0           ~ 168 0
11 ACO 757 ClG 09 12 57.79 +47 43 45.2           ~ 67 0
12 ACO 779 ClG 09 20 02.70 +33 45 29.7           ~ 261 0
13 ACO 954 ClG 10 13 52.41 -00 07 15.1           ~ 65 0
14 ACO 957 ClG 10 14 02.35 -00 53 30.0           ~ 225 2
15 ACO 971 ClG 10 19 52.08 +40 59 18.4           ~ 53 0
16 BAX 155.5304+38.5153 ClG 10 22 18.24 +38 32 39.6           ~ 63 0
17 ACO 1035 ClG 10 32 05.91 +40 17 25.9           ~ 88 0
18 ACO 1066 ClG 10 39 28.53 +05 11 01.2           ~ 96 1
19 BAX 163.4480+54.8499 ClG 10 53 50.83 +54 49 55.1           ~ 59 0
20 ACO 1142 ClG 11 00 56.74 +10 30 15.2           ~ 157 1
21 ACO 1173 ClG 11 09 14.40 +41 32 53.8           ~ 39 0
22 ACO 1190 ClG 11 11 43.83 +40 51 43.5           ~ 145 0
23 ACO 1205 ClG 11 13 23.41 +02 30 42.8           ~ 74 0
24 ZwCl 1114+5457 ClG 11 15 03.88 +54 26 30.2           ~ 33 0
25 Shk 352 GrG 11 21.7 +02 54           ~ 13 0
26 ACO 1291 ClG 11 32 11.20 +56 01 31.3           ~ 135 0
27 ACO 1314 ClG 11 34 53.0 +49 05 18           ~ 234 1
28 ACO 1377 ClG 11 47 18.24 +55 43 29.1           ~ 148 1
29 ACO 1424 ClG 11 57 30.50 +05 05 24.5           ~ 68 0
30 ACO 1436 ClG 12 00 20.04 +56 17 10.1           ~ 120 0
31 NAME NGC 4073 Group GrG 12 04 44.08 +01 48 40.9     13.53     ~ 292 0
32 ZwCl 1207+0542 ClG 12 10 29.06 +05 21 49.7           ~ 41 0
33 ZwCl 1215+0400 ClG 12 17 43.62 +03 38 51.5           ~ 169 0
34 NGC 4325 BiC 12 23 06.662 +10 37 16.45   15.0       ~ 140 1
35 BAX 185.7731+10.6201 ClG 12 23 06.7 +10 37 15           ~ 47 0
36 ACO 1552 ClG 12 29 46.18 +11 44 32.3           ~ 109 0
37 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
38 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
39 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 325 0
40 ACO 1663 ClG 13 02 52.55 -02 31 04.0           ~ 112 0
41 BAX 197.3253-01.6227 GrG 13 09 17.14 -01 35 36.3     16.09     ~ 43 0
42 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
43 ACO 1728 ClG 13 23 18.78 +11 18 17.8           ~ 31 0
44 BAX 201.5734+00.2261 ClG 13 26 21.77 +00 12 24.2     15.80     ~ 36 0
45 NAME NGC 5171 Group GrG 13 29 05.10 +11 45 04.8     4.7     ~ 78 0
46 ACO 1750 ClG 13 30 50.44 -01 51 27.1           ~ 190 2
47 ACO 1767 ClG 13 36 06.92 +59 10 34.3           ~ 182 0
48 ACO 1773 ClG 13 42 22.53 +02 15 14.2           ~ 119 0
49 MCXC J1351.7+4622 ClG 13 51 45.6 +46 22 00           ~ 29 0
50 ACO 1809 ClG 13 53 07.68 +05 08 32.7           ~ 179 0
51 ACO 1885 ClG 14 13 43.73 +43 39 45.0           ~ 75 0
52 BAX 220.1796+03.4530 ClG 14 40 34.37 +03 29 49.7     14.31     ~ 131 0
53 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
54 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
55 ACO 2064 ClG 15 20 59.4 +48 38 17           ~ 53 0
56 ACO 2061 ClG 15 21 19.90 +30 37 13.0           ~ 214 1
57 ACO 2067 ClG 15 23 14 +30 54.4           ~ 111 1
58 NAME CrB Supercluster SCG 15 25 +29.5           ~ 148 0
59 ACO 2110 ClG 15 39 39.82 +30 42 27.9           ~ 83 0
60 ACO 2122 ClG 15 44 55.93 +36 06 05.2           ~ 243 0
61 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
62 ACO 2149 ClG 16 00 53.08 +53 56 57.6           ~ 79 0
63 ACO 2169 ClG 16 13 59.22 +49 07 07.2           ~ 64 0
64 NGC 6107 rG 16 17 20.143 +34 54 05.98   14.7       ~ 83 0
65 ACO 2175 ClG 16 20 30.70 +29 53 31.2           ~ 133 0
66 ACO 2197 ClG 16 27 48.01 +40 58 04.5           ~ 290 0
67 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
68 ACO 2245 ClG 17 02 38.26 +33 30 10.0           ~ 66 0
69 ACO 2244 ClG 17 02 40.33 +34 02 58.7           ~ 301 0
70 ACO 2249 ClG 17 09 36.76 +34 28 04.1           ~ 136 0
71 ACO 2255 ClG 17 12 56.0 +64 04 06           ~ 605 0
72 NGC 6338 Bla 17 15 22.9842192344 +57 24 40.346559927   14.2   8   ~ 205 2
73 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 390 0
74 ACO 2399 ClG 21 57 19.01 -07 50 57.5           ~ 197 0
75 SDSS-C4-DR3 2030 GrG 22 14 24.40 +13 50 11.0           ~ 38 0
76 [ATZ98] F054 SyG 22 14 53.7 +13 51 19           ~ 10 1
77 ACO 2428 ClG 22 16 07.01 -09 20 19.5           ~ 62 0
78 ACO 2593 ClG 23 24 27.15 +14 33 40.2           ~ 231 0
79 ACO 2670 ClG 23 54 10.51 -10 23 06.8           ~ 364 0

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