1999ApJ...527..535W


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.27CEST09:38:25

1999ApJ...527..535W - Astrophys. J., 527, 535-544 (1999/December-3)

The core structure of galaxy clusters from gravitational lensing.

WILLIAMS L.L.R., NAVARRO J.F. and BARTELMANN M.

Abstract (from CDS):

We examine gravitational lensing constraints on the structure of galaxy clusters and compare them with the results of cosmological N-body simulations of cluster formation in cold dark matter -dominated universes. We find that cluster core masses, as measured by the observed location of giant tangential arcs, generally exceed those of dark matter halos of similar velocity dispersion. The magnitude of the discrepancy is a strong function of cluster mass. Arc properties in the most massive clusters in the sample (i.e., those with velocity dispersion σ∼1500-2000 km.s–1) are essentially consistent with the N-body predictions. On the other hand, giant arcs in σ∼1000 km.s–1 clusters can be reconciled with cold dark matter cluster halos only if their lensing power, i.e., central surface mass density, has been increased substantially by the presence of a massive (∼3x1012 h–1 M) central galaxy and of significant substructure. Best agreement is found if the mass of the central galaxy and the effects of substructure are approximately independent of cluster mass. Massive central galaxies with steep inner density profiles are also needed to explain a clear trend, observed in our data set, between the radial thickness of giant tangential arcs and the velocity dispersion of the lensing cluster. The position and redshift of radial arcs may be used as independent tests of these results, but at present the data set available is too limited to have a significant impact on these conclusions. Our results depend only weakly on the cosmological model adopted and suggest that structural parameters of clusters derived from strong lensing studies cannot usefully constrain the values of cosmological parameters.

Abstract Copyright:

Journal keyword(s): Galaxies: Clusters: General - Cosmology: Gravitational Lensing - Methods: {em n}-Body Simulations

Nomenclature: Table 1: [PKL99] ACO 2390 HN (No. H1).

Status at CDS:  

CDS comments: Table 1: other arcs are already known.

Simbad objects: 47

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Number of rows : 47

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 565 0
2 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 472 0
3 [KKF92] C LeI 00 26 33.9 +17 09 16           ~ 8 0
4 ZwCl 0024+1652 ClG 00 26 36.0 +17 08 36     18.35     ~ 603 1
5 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 636 0
6 NAME ACO 370 Giant Arc LeI 02 39 53.0 -01 35 05           ~ 17 0
7 ACO S 295 ClG 02 45 35.80 -53 02 16.8           ~ 46 0
8 ClG 0303+1658 ClG 03 05 31.6 +17 10 02     20.13     ~ 90 0
9 ClG 0440+02 ClG 04 43 09.7 +02 10 19     17.03     ~ 118 0
10 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 328 0
11 ACO S 506 ClG 05 01 04.4 -24 24 41           ~ 57 0
12 ZwCl 1006+1201 ClG 10 08 47.1 +11 47 55     18.0     ~ 65 0
13 ClG 1008-12 ClG 10 10 34.1 -12 39 48     18.0     ~ 144 0
14 ACO 963 ClG 10 17 09.6 +39 01 00           ~ 350 0
15 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1017 0
16 [HHS2008] 2b LeI 13 47 29.297 -11 45 39.86     21.5     ~ 9 0
17 [HHS2008] 3a LeI 13 47 32.11 -11 44 42.4     22.3     ~ 8 0
18 ClG J1347-1145 ClG 13 47 33.5 -11 45 42           ~ 463 0
19 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 348 0
20 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62     ~ 262 0
21 ACO 2124 ClG 15 44 59.3 +36 03 40           ~ 190 0
22 ACO 2163 ClG 16 15 34.1 -06 07 26           ~ 519 0
23 ClG 1621+26 ClG 16 23 35.7 +26 33 50           G0V 133 0
24 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 779 1
25 ACO 2280 ClG 17 43 06.6 +63 44 46           ~ 18 0
26 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 343 0
27 [FLH92] A0 LeI 21 40 15.3 -23 39 25           ~ 5 0
28 NAME ACO 2390 H1 Arc LeI 21 53 34.55 +17 42 03.4   21.9 21.5   19.8 ~ 16 0
29 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 624 2
30 ACO S 1077 ClG 22 58 52.34 -34 46 54.6           ~ 179 0
31 [L96b] Arc 1 LeI ~ ~           ~ 2 0
32 [GSL98] A3 GiC ~ ~   24.0       ~ 6 0
33 [GSL98] A2 GiC ~ ~           ~ 4 0
34 [LGH99] MS 0302.7+1658 A1W LeI ~ ~           ~ 1 0
35 LPS 359 LeI ~ ~           ~ 13 0
36 [LHA94] MS 1455.0+2232 1 LeI ~ ~           ~ 3 0
37 [LHA94] MS 1008.1-1224 2 LeI ~ ~   23.4       ~ 3 0
38 [LHA94] MS 1008.1-1224 1 LeI ~ ~           ~ 3 0
39 [LGH99] MS 0451.6-0305 A2 LeI ~ ~           ~ 2 0
40 [LG92] MS 1621.5+2640 Arc LeI ~ ~   23.1       ~ 4 0
41 [LHA94] MS 1006.0+1202 3 LeI ~ ~           ~ 4 0
42 [LHA94] MS 1006.0+1202 2 LeI ~ ~           ~ 4 0
43 [LGH99] MS 0451.6-0305 A1 LeI ~ ~     24.6     ~ 4 0
44 [MFM92] A1 LeI ~ ~   23.83       ~ 5 0
45 [SCE95] S1/S2 ? ~ ~           ~ 4 0
46 [SCE95] A0 ? ~ ~           ~ 3 0
47 [LGH99] MS 0302.7+1658 A1 LeI ~ ~           ~ 3 0

    Equat.    Gal    SGal    Ecl

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2020.05.27-09:38:25

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