2003ApJ...599....7O

Query : 2003ApJ...599....7O

2003ApJ...599....7O - Astrophys. J., 599, 7-23 (2003/December-2)

Arc statistics in triaxial dark matter halos: testing the collisionless cold dark matter paradigm.

OGURI M., LEE J. and SUTO Y.

Abstract (from CDS):

Statistics of lensed arcs in clusters of galaxies serve as a powerful probe of both the nonsphericity and the inner slope of dark matter halos. We develop a semianalytic method to compute the number of arcs in triaxial dark matter halos. This combines the lensing cross section from the Monte Carlo ray-tracing simulations and the probability distribution function of the axis ratios evaluated from cosmological N-body simulations. This approach enables one to incorporate both asymmetries in the projected mass density and elongations along the line of sight analytically for the first time in cosmological lensed arc statistics. As expected, triaxial dark matter halos significantly increase the number of arcs relative to spherical models; the difference amounts to more than 1 order of magnitude, while the value of enhancement depends on the specific properties of density profiles. Then we compare our theoretical predictions with the observed number of arcs from 38 X-ray-selected clusters. In contrast to previous claims, our triaxial dark matter halos with inner density profile ρ∝r–1.5 in a Λ-dominated cold dark matter (CDM) universe reproduce observations well. Since both the central mass concentration and triaxial axis ratios (minor-to-major axis ratio ∼ 0.5) required to account for the observed data are consistent with cosmological N-body simulations, our result may be interpreted to lend strong support to the collisionless CDM paradigm at the mass scale of clusters.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Theory - Cosmology: Dark Matter - Galaxies: Clusters: General - Cosmology: Gravitational Lensing

Errata: erratum vol. 608, p. 1175 (2004)

Simbad objects: 53

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Number of rows : 53
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 ClG 0011.7+0837 ClG 00 14 21.1 +08 54 11     17.5     ~ 25 0
2 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 517 0
3 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 825 0
4 ClG 0302+17 ClG 03 05 19.0 +17 28 38     21.00     ~ 58 0
5 ClG 0303+1658 ClG 03 05 31.6 +17 10 02     20.13     ~ 92 0
6 ACO S 400 ClG 03 55 33.29 -36 34 18.5           ~ 40 0
7 ClG 0433.9+0957 ClG 04 36 40.5 +10 03 09   18.58       ~ 22 0
8 [GSL98] A3 GiC 04 43 08.450 +02 10 27.29   24.0       ~ 8 0
9 ClG 0440+02 ClG 04 43 09.7 +02 10 19     17.03     ~ 129 0
10 [GSL98] A1 GiC 04 43 11.100 +02 10 10.19   22.9       ~ 7 0
11 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
12 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 368 0
13 ZwCl 0735+7421 ClG 07 41 40.3 +74 14 58     17.70     ~ 273 0
14 ClG 0811+63 ClG 08 16 04.0 +62 52 19     18.5     ~ 23 0
15 ZwCl 0839+2937 ClG 08 42 55.9 +29 27 26     17.0     ~ 93 0
16 ClG 0906.5+1110 ClG 09 09 12.7 +10 58 32           ~ 108 0
17 ZwCl 1006+1201 ClG 10 08 47.1 +11 47 55     18.0     ~ 75 0
18 ClG 1008-12 ClG 10 10 34.1 -12 39 48     18.0     ~ 155 0
19 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 458 0
20 ClG 1137+66 ClG 11 40 23.0 +66 08 16     21.0     ~ 141 0
21 ClG 1147+11 ClG 11 49 52.6 +10 46 37     19.0     ~ 29 0
22 ACO 1455 ClG 12 04 04.0 +28 07 08           ~ 56 0
23 ClG 1208+39 ClG 12 11 16.0 +39 11 41     19.8     ~ 38 0
24 ClG 1224+20 ClG 12 27 14.9 +19 51 06   19.0       ~ 96 0
25 ClG 1231+15 ClG 12 33 55.3 +15 25 58     18.5     ~ 54 0
26 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1
27 ClG 1241+17 ClG 12 44 02.6 +16 54 11     19.0     ~ 42 0
28 NVSS J124605+705753 Rad 12 46 04.94 +70 57 53.6           ~ 19 1
29 ClG 1244.2+7114 ClG 12 46 08.00 +70 57 53.0     17.54     ~ 18 0
30 ClG 1253.9+0456 ClG 12 56 28.8 +04 40 02     18.0     ~ 25 0
31 NAME Subaru Deep Field NGP reg 13 24 21.3 +27 29 23           ~ 330 1
32 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 370 0
33 ClG 1426+01 ClG 14 28 58.9 +01 43 59     19.0     ~ 34 0
34 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
35 ClG J1514+3636 ClG 15 14 22.0 +36 36 22     19.0     ~ 136 0
36 ClG 1546.8+1132 ClG 15 49 13.0 +11 23 09     17.66     ~ 18 0
37 ACO 2177 ClG 16 21 02.6 +25 45 55           ~ 38 0
38 ClG 1621+26 ClG 16 23 35.7 +26 33 50           ~ 145 0
39 ClG 1910+6736 ClG 19 10 31.2 +67 41 28     19.0     ~ 38 0
40 ClG 2053-04 ClG 20 56 21.2 -04 37 46   21.0       ~ 168 0
41 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 390 0
42 [DEM2009] B1 LeG 21 40 15.156 -23 39 33.38   22.0       ~ 12 0
43 ClG 2255.7+2039 ClG 22 58 07.1 +20 55 06     15.80     ~ 31 1
44 ClG 2301.3+1506 ClG 23 03 47.4 +15 22 39     18.0     ~ 17 0
45 ACO 2580 ClG 23 21 23.3 -23 11 16           ~ 49 0
46 [LHA94] MS 1008.1-1224 2 LeI ~ ~   23.4       ~ 3 0
47 [LG92] MS 1621.5+2640 Arc LeI ~ ~   23.1       ~ 4 0
48 [LHA94] MS 1006.0+1202 3 LeI ~ ~           ~ 4 0
49 [LHA94] MS 1006.0+1202 2 LeI ~ ~           ~ 4 0
50 [MFM92] A1 LeI ~ ~   23.83       ~ 5 0
51 [LGH99] MS 0451.6-0305 A1 LeI ~ ~     24.6     ~ 4 0
52 [LGH99] MS 1358.4+6245 A1 LeI ~ ~           ~ 3 1
53 [LHA94] MS 1006.0+1202 4 LeI ~ ~     21.4     ~ 3 0

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