2003ApJ...591..662D

Query : 2003ApJ...591..662D

2003ApJ...591..662D - Astrophys. J., 591, 662-676 (2003/July-2)

Weak gravitational lensing by a sample of X-ray-luminous clusters of galaxies. III. Serendipitous weak lensing detections of dark and luminous mass concentrations.

DAHLE H., PEDERSEN K., LILJE P.B., MADDOX S.J. and KAISER N.

Abstract (from CDS):

In the course of a weak gravitational lensing survey of 39 clusters of galaxies, covering a total sky area of ∼1 deg2, we have serendipitously discovered mass concentrations in the fields of A1705 and A1722 that are most probably not associated with the main cluster target. By combining weak lensing information with two-color galaxy photometry in fields centered on our sample clusters, we identify a new cluster candidate at z∼0.5 in the field of A1705. This cluster candidate also displays strong lensing in the form of a giant luminous arc. The new mass concentration in the field of A1722 also seems to be associated with an optically luminous cluster of galaxies at z∼0.5, but in this case there is some evidence for additional structures along the line of sight that may contribute to the lensing signal. A third cluster, A959, has a dark subclump that shows interesting morphological evidence in the mass map for being associated with the main cluster. This is the first case where there is any significant evidence for a physical association between a dark subclump (discovered from weak lensing) and a normal cluster. Analysis of archival X-ray data shows that the three new mass concentrations are not firmly detected in X-rays and that they are X-ray-underluminous.

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

Nomenclature: Table 1: [DPL2003] WL JHHMM.m+DDMM N=3. Text: [DPL2003] JHHMMSS.s+DDMMSS N=2.

CDS comments: Paragr. 3.1: Sources A to D in ACO 959 not identified in SIMBAD.

Simbad objects: 17

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Number of rows : 17
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 68 ClG 00 37 06.2 +09 09 33           ~ 195 0
2 NGC 625 AGN 01 35 04.632 -41 26 10.32 12.37 11.78 11.25 11.03 11.5 ~ 312 2
3 ClG J0224-0002 ClG 02 24 34.10 -00 02 30.9           ~ 54 1
4 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 277 0
5 [DPL2003] WL J1017.3+5931 ? 10 17 15.0 +59 30 46           ~ 3 0
6 ACO 959 ClG 10 17 35.0 +59 33 28           ~ 76 0
7 ClG 1224+20 ClG 12 27 14.9 +19 51 06   19.0       ~ 96 0
8 [DPL2003] WL J1312.5+7252 ? 13 12 31.0 +72 51 32           ~ 2 0
9 [DPL2003] J131231.1+725054 BiC 13 12 31.1 +72 50 54           ~ 3 1
10 [DPL2003] J131232.6+725055 LeI 13 12 32.6 +72 50 55           ~ 2 1
11 ACO 1705 ClG 13 12 54.800 +72 55 00.00           ~ 21 0
12 LEDA 140156 Sy1 13 13 32.1606097896 +72 59 10.854029364     16.74     ~ 13 0
13 ACO 1722 ClG 13 20 08.3 +70 04 33           ~ 63 0
14 [DPL2003] WL J1320.4+6959 ? 13 20 22.0 +69 58 43           ~ 1 0
15 ACO 1942 ClG 14 38 21.8673 +03 40 13.247           ~ 122 0
16 ClG 1603+4313 ClG 16 04 23.7 +43 04 52           ~ 134 1
17 ClG 2236-04 ClG 22 39 35.6 -04 28 47           ~ 28 0

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