2003ApJ...584..691Z

Query : 2003ApJ...584..691Z

2003ApJ...584..691Z - Astrophys. J., 584, 691-701 (2003/February-3)

On the incidence of strong gravitational lensing by clusters in the Las Campanas distant cluster survey.

ZARITSKY D. and GONZALEZ A.H.

Abstract (from CDS):

The observed incidence of strongly lensing clusters exceeds the predictions of a ΛCDM model by about a factor of 10. We revisit the observational side of this discrepancy by measuring the incidence of strong lensing in a subsample of clusters drawn from the Las Campanas Distant Cluster Survey (LCDCS). Among clusters with 0.5≤z≤0.7, the redshift range in which we focus our search, we find two strongly lensed systems within an effective search area of 69 deg2. There is at least one other strongly lensed system in the LCDCS outside of this redshift range, where we are less complete. Over all redshifts, the ΛCDM model produces one large arc every 146 deg2. Assuming Poisson statistics, the probability of finding three or more strongly lensing clusters in 69 deg2 is 0.012. The lensing incidence within the LCDCS is in agreement with that derived from an X-ray-selected sample and what has been preliminarily presented from an independent optical cluster survey. The origin of the disagreement between theory and observations, which remains at least at the order-of-magnitude scale for the ΛCDM model, lies either in the concordance cosmological model, in the characteristics of the resulting cluster potentials, or in the adopted source population.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Observations - Galaxies: Clusters: General - Cosmology: Gravitational Lensing

Nomenclature: Figs 3-5, Table 2: [ZG2003] LCDCS 280 N (Nos 1-6), [ZG2003] LCDCS 480 Na (Nos 1, 1a-1b), [ZG2003] LCDCS 954 N (Nos 1-4).

Simbad objects: 48

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Number of rows : 48
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 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 368 0
2 LCDCS 0005 ClG 10 02 27.14 -12 47 13.1     21.05     ~ 4 0
3 LCDCS 0017 ClG 10 05 43.60 -11 47 43.1           ~ 4 0
4 LCDCS 0027 ClG 10 07 54.7 -12 21 19           ~ 2 0
5 LCDCS 0091 ClG 10 31 50.26 -12 44 27.2     21.20     ~ 4 0
6 LCDCS 0104 ClG 10 36 10.4 -12 44 43           ~ 2 0
7 LCDCS 0111 ClG 10 38 00.0 -12 18 54           ~ 2 0
8 LCDCS 0163 ClG 10 51 22.7 -12 01 27           ~ 2 0
9 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 458 0
10 LCDCS 0240 ClG 11 17 22.0 -11 55 46           ~ 2 0
11 LCDCS 0248 ClG 11 18 36.2 -12 02 03           ~ 2 0
12 LCDCS 0280 ClG 11 23 59.4 -11 50 07           ~ 2 0
13 LCDCS 0374 ClG 11 48 06.0 -11 45 33           ~ 2 0
14 LCDCS 0415 ClG 11 57 34.7 -12 18 48           ~ 2 0
15 LCDCS 0417 ClG 11 57 54.3 -11 51 22           ~ 2 0
16 LCDCS 0418 ClG 11 58 14.6 -12 14 11           ~ 2 0
17 LCDCS 0468 ClG 12 10 12.73 -12 19 06.9     22.14     ~ 4 0
18 LCDCS 0486 ClG 12 12 29.9 -12 16 19           ~ 2 0
19 LCDCS 0550 ClG 12 35 27.7 -12 57 01           ~ 2 0
20 LCDCS 0586 ClG 12 44 51.7 -12 56 56           ~ 2 0
21 LCDCS 0589 ClG 12 45 02.0 -11 49 19           ~ 2 0
22 LCDCS 0616 ClG 12 55 31.5 -12 16 55           ~ 2 0
23 LCDCS 0635 ClG 13 01 44.9 -12 13 24           ~ 2 0
24 LCDCS 0684 ClG 13 15 47.5 -11 37 26           ~ 2 0
25 LCDCS 0698 ClG 13 19 50.3 -12 06 35           ~ 2 0
26 LCDCS 0717 ClG 13 22 56.9 -11 44 43           ~ 2 0
27 LCDCS 0719 ClG 13 23 50.2 -12 52 51           ~ 2 0
28 LCDCS 0778 ClG 13 35 50.4 -11 46 16           ~ 2 0
29 LCDCS 0785 ClG 13 37 08.7 -12 57 14           ~ 2 0
30 LCDCS 0795 ClG 13 39 22.1 -13 00 14           ~ 2 0
31 LCDCS 0801 ClG 13 40 09.6 -12 10 09           ~ 2 0
32 LCDCS 0814 ClG 13 42 12.8 -12 59 28           ~ 2 0
33 LCDCS 0827 ClG 13 46 42.4 -11 59 24           ~ 2 0
34 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
35 LCDCS 0836 ClG 13 48 52.0 -12 04 19           ~ 3 0
36 LCDCS 0857 ClG 13 54 50.9 -12 09 11           ~ 2 0
37 LCDCS 0879 ClG 14 01 30.8 -11 44 46           ~ 2 0
38 LCDCS 0883 ClG 14 03 15.8 -12 14 18           ~ 2 0
39 LCDCS 0899 ClG 14 05 37.0 -12 23 38           ~ 2 0
40 LCDCS 0923 ClG 14 10 35.6 -12 25 05           ~ 2 0
41 LCDCS 0944 ClG 14 16 30.6 -12 35 59           ~ 2 0
42 LCDCS 0954 ClG 14 20 29.7 -11 34 04           ~ 7 0
43 LCDCS 0961 ClG 14 24 16.7 -12 09 51           ~ 2 0
44 LCDCS 0974 ClG 14 28 59.7 -12 27 07           ~ 2 0
45 LCDCS 1007 ClG 14 46 08.4 -12 32 08           ~ 2 0
46 LCDCS 1038 ClG 14 59 03.0 -12 51 08           ~ 2 0
47 LCDCS 1050 ClG 15 01 43.4 -11 51 54           ~ 2 0
48 ClG 2053-04 ClG 20 56 21.2 -04 37 46   21.0       ~ 168 0

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