2008A&A...492..345C

Query : 2008A&A...492..345C

2008A&A...492..345C - Astronomy and Astrophysics, volume 492, 345-354 (2008/12-3)

The structure and dynamics of Abell 1942.

CAPELATO H.V., PROUST D., LIMA NETO G.B., SANTOS W.A. and SODRE L.Jr

Abstract (from CDS):

We present a dynamical analysis of the galaxy cluster Abell 1942 based on a set of 128 velocities obtained at the European Southern Observatory. Data on individual galaxies are presented and the accuracy of the determined velocities as some properties of the cluster are discussed. We have also made use of publicly available Chandra X-ray data. We obtained an improved mean redshift value z=0.22513±0.0008 and velocity dispersion σ=908+147–139km/s. Our analysis indicates that inside a radius of ∼1.5h70–1Mpc (∼7arcmin) the cluster is well relaxed, without any remarkable features and the X-ray emission traces the galaxy distribution fairly well. Two possible optical substructures are seen at ∼5 arcmin from the centre in the northwest and the southwest directions, but are not confirmed by the velocity field. These clumps are, however, kinematically bound to the main structure of Abell 1942. X-ray spectroscopic analysis of Chandra data resulted in a temperature kT=5.5±0.5keV and metal abundance Z=0.33±0.15Z☉. The velocity dispersion corresponding to this temperature using the TX-σ scaling relation is in good agreement with the measured galaxy velocities. Our photometric redshift analysis suggests that the weak lensing signal observed to the south of the cluster and previously attributed to a ``dark clump'' is produced by background sources, possibly distributed as a filamentary structure.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: Abell 1942 - galaxies: kinematics and dynamics

VizieR on-line data: <Available at CDS (J/A+A/492/345): tablea1.dat>

Nomenclature: Table A.1: [CPL2008] NNNN (Nos 1-128).

CDS comments: Fig.2: The mentionned arc was previously cited by Smail et al. (1991MNRAS.252...19S)

Simbad objects: 130

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Number of rows : 130
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 180 0
2 SDSS J143754.75+033915.9 GiC 14 37 54.759 +03 39 15.98           ~ 1 0
3 SDSS J143755.19+033422.2 GiC 14 37 55.190 +03 34 22.29           ~ 1 0
4 SDSS J143756.19+033455.4 GiC 14 37 56.191 +03 34 55.45           ~ 1 0
5 SDSS J143756.97+033941.5 GiC 14 37 56.978 +03 39 41.50           ~ 1 0
6 [CPL2008] 5 GiC 14 37 57.52 +03 46 50.9           ~ 1 0
7 SDSS J143757.93+034203.4 GiC 14 37 57.930 +03 42 03.45           ~ 1 0
8 SDSS J143757.98+033638.2 GiC 14 37 57.988 +03 36 38.29           ~ 1 0
9 SDSS J143758.59+033414.4 GiC 14 37 58.598 +03 34 14.46           ~ 1 0
10 SDSS J143758.94+034101.6 GiC 14 37 58.9510930488 +03 41 01.717234872           ~ 1 0
11 SDSS J143759.52+034616.2 GiC 14 37 59.528 +03 46 16.26           ~ 1 0
12 SDSS J143800.38+033717.2 GiC 14 38 00.382 +03 37 17.25           ~ 1 0
13 SDSS J143800.45+034558.7 GiC 14 38 00.454 +03 45 58.78           ~ 1 0
14 SDSS J143800.71+033605.4 GiC 14 38 00.710 +03 36 05.41           ~ 1 0
15 SDSS J143800.82+033612.4 GiC 14 38 00.8303901360 +03 36 12.469873608           ~ 1 0
16 SDSS J143801.19+033708.1 GiC 14 38 01.1956811112 +03 37 08.138274924           ~ 2 0
17 [CPL2008] 16 GiC 14 38 01.2335647368 +03 41 54.277424088           ~ 3 0
18 SDSS J143802.03+033955.0 GiC 14 38 02.034 +03 39 55.00           ~ 1 0
19 SDSS J143802.59+034526.6 GiC 14 38 02.597 +03 45 26.62           ~ 1 0
20 SDSS J143802.68+033301.1 GiC 14 38 02.688 +03 33 01.12           ~ 1 0
21 SDSS J143802.96+033446.4 GiC 14 38 02.963 +03 34 46.46           ~ 1 0
22 [CPL2008] 21 GiC 14 38 03.2225597040 +03 40 22.305089856           ~ 1 0
23 SDSS J143803.61+034607.0 GiC 14 38 03.610 +03 46 07.06           ~ 1 0
24 SDSS J143803.69+034030.1 GiC 14 38 03.693 +03 40 30.12           ~ 1 0
25 SDSS J143804.13+033556.2 GiC 14 38 04.134 +03 35 56.22           ~ 1 0
26 SDSS J143804.17+034613.7 GiC 14 38 04.170 +03 46 13.75           ~ 1 0
27 SDSS J143804.68+033412.4 GiC 14 38 04.686 +03 34 12.44           ~ 2 0
28 SDSS J143804.81+033832.0 GiC 14 38 04.819 +03 38 32.03           ~ 1 0
29 SDSS J143805.14+034524.5 GiC 14 38 05.142 +03 45 24.56           ~ 1 0
30 [CPL2008] 29 GiC 14 38 05.395 +03 39 18.07           ~ 2 0
31 SDSS J143805.46+033340.2 GiC 14 38 05.469 +03 33 40.25           ~ 1 0
32 SDSS J143805.80+034426.7 GiC 14 38 05.806 +03 44 26.73           ~ 1 0
33 SDSS J143806.10+033435.2 GiC 14 38 06.101 +03 34 35.20           ~ 1 0
34 SDSS J143806.47+033948.1 GiC 14 38 06.479 +03 39 48.16           ~ 1 0
35 SDSS J143806.74+034449.4 GiC 14 38 06.741 +03 44 49.41           ~ 1 0
36 SDSS J143807.05+033622.2 GiC 14 38 07.057 +03 36 22.28           ~ 1 0
37 SDSS J143807.15+033808.0 GiC 14 38 07.152 +03 38 08.00           ~ 1 0
38 SDSS J143807.88+033904.7 GiC 14 38 07.881 +03 39 04.72           ~ 2 0
39 SDSS J143807.95+034546.7 GiC 14 38 07.953 +03 45 46.73           ~ 1 0
40 SDSS J143815.14+033625.0 GiC 14 38 15.142 +03 36 25.02           ~ 1 0
41 SDSS J143815.43+034020.4 GiC 14 38 15.435 +03 40 20.48           ~ 1 0
42 SDSS J143816.24+033509.9 GiC 14 38 16.245 +03 35 09.98           ~ 1 0
43 SDSS J143816.35+033417.2 GiC 14 38 16.353 +03 34 17.25           ~ 1 0
44 [CPL2008] 43 GiC 14 38 16.472 +03 39 40.09           ~ 2 0
45 SDSS J143816.57+034327.1 GiC 14 38 16.574 +03 43 27.19           ~ 1 0
46 DES J143816.90+034354.8 rG 14 38 16.9053382680 +03 43 54.826588812           ~ 3 0
47 [CPL2008] 46 GiC 14 38 17.123 +03 39 14.31           ~ 2 0
48 SDSS J143817.14+033432.1 GiC 14 38 17.141 +03 34 32.12           ~ 1 0
49 [CPL2008] 47 GiC 14 38 17.153 +03 32 55.53           ~ 1 0
50 SDSS J143817.17+033230.9 GiC 14 38 17.177 +03 32 30.96           ~ 1 0
51 [CPL2008] 50 GiC 14 38 17.826 +03 43 23.40           ~ 2 0
52 [CPL2008] 51 GiC 14 38 18.0389960400 +03 34 25.714176744           ~ 2 0
53 SDSS J143818.12+033952.3 GiC 14 38 18.124 +03 39 52.33           ~ 1 0
54 2MASX J14381821+0331178 GiC 14 38 18.2193463008 +03 31 17.227121052           ~ 8 0
55 2MASX J14381895+0338228 GiC 14 38 18.916 +03 38 22.85           ~ 9 0
56 [CPL2008] 55 GiC 14 38 19.014 +03 39 10.13           ~ 2 0
57 [CPL2008] 57 BiC 14 38 19.262 +03 33 49.32           ~ 3 0
58 [CPL2008] 56 GiC 14 38 19.264 +03 46 13.92           ~ 2 0
59 SDSS J143819.79+034039.9 GiC 14 38 19.796 +03 40 39.94           ~ 1 0
60 SDSS J143820.07+033028.1 GiC 14 38 20.079 +03 30 28.10           ~ 1 0
61 [CPL2008] 60 GiC 14 38 20.1042537984 +03 40 50.424033972           ~ 2 0
62 SDSS J143820.44+034610.5 GiC 14 38 20.448 +03 46 10.50           ~ 1 0
63 SDSS J143820.95+034439.8 GiC 14 38 20.9591658096 +03 44 39.881683752           ~ 2 0
64 SDSS J143821.46+033243.1 GiC 14 38 21.463 +03 32 43.12           ~ 1 0
65 [CPL2008] 64 GiC 14 38 21.6283420056 +03 45 47.230266456           ~ 2 0
66 SDSS J143821.71+033550.1 GiC 14 38 21.710 +03 35 50.15           ~ 1 0
67 SDSS J143821.72+033226.6 GiC 14 38 21.726 +03 32 26.67           ~ 1 0
68 ACO 1942 ClG 14 38 21.8673 +03 40 13.247           ~ 118 0
69 2MASX J14382188+0340138 BiC 14 38 21.8715090192 +03 40 13.344492936           ~ 47 1
70 [CPL2008] 68 GiC 14 38 22.374 +03 39 20.94           ~ 2 0
71 SDSS J143822.58+033236.9 GiC 14 38 22.584 +03 32 36.96           ~ 1 0
72 SDSS J143822.63+034607.3 GiC 14 38 22.638 +03 46 07.38           ~ 1 0
73 SDSS J143822.64+033725.6 GiC 14 38 22.6491845112 +03 37 25.710125556           ~ 1 0
74 DES J143822.84+033951.8 rG 14 38 22.8497856264 +03 39 51.923744280           ~ 3 0
75 SDSS J143822.99+033238.9 GiC 14 38 22.996 +03 32 38.95           ~ 1 0
76 DES J143823.10+034053.8 rG 14 38 23.1132629808 +03 40 53.892332220           ~ 3 0
77 SDSS J143823.14+033253.5 GiC 14 38 23.140 +03 32 53.59           ~ 1 0
78 [CPL2008] 76 GiC 14 38 23.827 +03 39 39.36           ~ 2 0
79 [CPL2008] 77 GiC 14 38 24.1961602440 +03 35 48.287714928           ~ 1 0
80 SDSS J143824.48+033228.6 GiC 14 38 24.480 +03 32 28.69           ~ 1 0
81 [CPL2008] 79 GiC 14 38 24.7415311656 +03 33 14.965955352           ~ 2 0
82 [CPL2008] 80 GiC 14 38 24.7522507032 +03 39 17.742516696           ~ 2 0
83 [CPL2008] 81 GiC 14 38 24.8093832048 +03 43 43.037567904           ~ 1 0
84 SDSS J143825.04+033947.6 GiC 14 38 25.048 +03 39 47.60           ~ 1 0
85 SDSS J143825.26+033433.4 GiC 14 38 25.266 +03 34 33.46           ~ 1 0
86 SDSS J143825.60+034521.0 GiC 14 38 25.605 +03 45 21.01           ~ 1 0
87 SDSS J143825.66+033503.5 GiC 14 38 25.669 +03 35 03.53           ~ 1 0
88 SDSS J143825.80+033209.5 GiC 14 38 25.803 +03 32 09.57           ~ 1 0
89 SDSS J143826.05+034013.9 GiC 14 38 26.054 +03 40 13.92           ~ 1 0
90 2MASX J14382636+0338588 rG 14 38 26.3358332808 +03 38 58.702360992           ~ 7 0
91 LEDA 1257327 GiC 14 38 27.0503285928 +03 43 01.143223716           ~ 3 0
92 SDSS J143827.07+033404.3 GiC 14 38 27.078 +03 34 04.31           ~ 1 0
93 [CPL2008] 91 GiC 14 38 27.37 +03 40 07.1           ~ 1 0
94 [CPL2008] 92 GiC 14 38 28.3891967784 +03 38 50.370569664           ~ 2 0
95 SDSS J143828.43+033526.8 GiC 14 38 28.435 +03 35 26.81           ~ 1 0
96 SDSS J143828.52+034531.6 GiC 14 38 28.527 +03 45 31.63           ~ 1 0
97 SDSS J143829.99+033519.0 GiC 14 38 29.997 +03 35 19.03           ~ 1 0
98 SDSS J143835.99+033626.8 GiC 14 38 36.000 +03 36 26.82           ~ 1 0
99 [CPL2008] 97 GiC 14 38 36.2135397480 +03 38 53.167785108           ~ 2 0
100 SDSS J143836.26+034533.3 GiC 14 38 36.268 +03 45 33.30           ~ 1 0
101 SDSS J143836.74+034459.8 GiC 14 38 36.741 +03 44 59.89           ~ 1 0
102 [CPL2008] 100 GiC 14 38 37.416 +03 36 26.32           ~ 2 0
103 SDSS J143837.46+034426.3 GiC 14 38 37.462 +03 44 26.35           ~ 1 0
104 DES J143837.61+033931.8 rG 14 38 37.6169547480 +03 39 31.878472176           ~ 3 0
105 SDSS J143837.99+033356.6 GiC 14 38 37.992 +03 33 56.65           ~ 1 0
106 SDSS J143838.33+034043.7 GiC 14 38 38.334 +03 40 43.71           ~ 1 0
107 SDSS J143839.28+034420.8 GiC 14 38 39.280 +03 44 20.89           ~ 1 0
108 SDSS J143839.38+033622.8 GiC 14 38 39.388 +03 36 22.81           ~ 1 0
109 [CPL2008] 107 GiC 14 38 39.927 +03 42 09.85           ~ 2 0
110 SDSS J143840.46+033619.0 GiC 14 38 40.464 +03 36 19.09           ~ 1 0
111 SDSS J143840.52+033928.6 GiC 14 38 40.5257358456 +03 39 28.715161752           ~ 1 0
112 SDSS J143841.16+033512.0 GiC 14 38 41.162 +03 35 12.04           ~ 1 0
113 SDSS J143841.70+033341.1 GiC 14 38 41.709 +03 33 41.19           ~ 1 0
114 [CPL2008] 112 BiC 14 38 41.9058693432 +03 46 52.270660848           ~ 2 0
115 [CPL2008] 113 GiC 14 38 42.19 +03 34 15.8           ~ 1 0
116 SDSS J143842.36+033800.7 GiC 14 38 42.365 +03 38 00.78           ~ 1 0
117 2MASX J14384314+0347156 GiC 14 38 43.1247439272 +03 47 15.475229124           ~ 3 0
118 SDSS J143843.20+033402.7 GiC 14 38 43.201 +03 34 02.78           ~ 2 0
119 SDSS J143844.15+034602.6 GiC 14 38 44.152 +03 46 02.64           ~ 1 0
120 SDSS J143844.92+033841.4 GiC 14 38 44.926 +03 38 41.49           ~ 1 0
121 SDSS J143845.45+033521.2 GiC 14 38 45.453 +03 35 21.23           ~ 1 0
122 SDSS J143845.56+034545.3 GiC 14 38 45.561 +03 45 45.37           ~ 1 0
123 SDSS J143845.89+034033.4 GiC 14 38 45.893 +03 40 33.43           ~ 1 0
124 SDSS J143846.24+033459.0 GiC 14 38 46.243 +03 34 59.00           ~ 1 0
125 SDSS J143846.66+034454.1 GiC 14 38 46.664 +03 44 54.16           ~ 1 0
126 SDSS J143846.99+034054.6 GiC 14 38 46.9921664376 +03 40 54.625361448           ~ 2 0
127 SDSS J143847.13+033705.6 GiC 14 38 47.139 +03 37 05.65           ~ 1 0
128 SDSS J143847.79+033402.9 GiC 14 38 47.799 +03 34 02.96           ~ 1 0
129 SDSS J143849.16+034138.0 GiC 14 38 49.164 +03 41 38.03           ~ 1 0
130 SDSS J143849.17+033458.3 GiC 14 38 49.175 +03 34 58.34           ~ 1 0

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