2013A&A...559A.105F

Query : 2013A&A...559A.105F

2013A&A...559A.105F - Astronomy and Astrophysics, volume 559A105-105 (2013/11-1)

SARCS strong-lensing galaxy groups. I. Optical, weak lensing, and scaling laws.

FOEX G., MOTTA V., LIMOUSIN M., VERDUGO T., MORE A., CABANAC R., GAVAZZI R. and MUNOZ R.P.

Abstract (from CDS):

We present the weak-lensing and optical analysis of the SL2S-ARCS (SARCS) sample of strong-lensing candidates. The sample is based on the Strong Lensing Legacy Survey (SL2S), a systematic search of strong-lensing systems in the photometric Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). The SARCS sample focusses on arc-like features and is designed to contain mostly galaxy groups. We briefly present the weak-lensing methodology that we used to estimate the mass of the SARCS objects. Among 126 candidates, we obtained a weak-lensing detection (at the 1σ level) for 89 objects with velocity dispersions of the singular isothermal sphere mass model (SIS) ranging from σSIS∼350km/s to ∼1000km/s with an average value of σSIS∼600km/s, corresponding to a rich galaxy group (or poor cluster). From the galaxies belonging to the bright end of the group's red sequence (Mi←21), we derived the optical properties of the SARCS candidates. We obtained typical richnesses of N∼5-15 galaxies and optical luminosities of L∼0.5-1.5x1012L☉ (within a radius of 0.5Mpc). We used these galaxies to compute luminosity density maps, from which a morphological classification reveals that a large fraction of the sample (∼45%) are groups with a complex light distribution, either elliptical or multi-modal, suggesting that these objects are dynamically young structures. We finally combined the lensing and optical analyses to define a sample of the 80 most secure group candidates, i.e. weak-lensing detection and over-density at the lens position in the luminosity map, to remove false detections and galaxy-scale systems from the initial sample. We use this reduced sample to probe the optical scaling relations in combination with a sample of massive galaxy clusters. We detect the expected correlations over the probed range in mass with a typical scatter of ∼25% in σSIS at a given richness or luminosity, making these scaling laws interesting mass proxies.

Abstract Copyright: ∼

Journal keyword(s): gravitational lensing: weak - cosmology: observations - dark matter - galaxies: groups: general

Simbad objects: 89

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Number of rows : 89
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 [MCM2012] SA1 gLS 02 01 21.9 -09 15 15           ~ 2 0
2 [MCM2012] SA2 gLS 02 02 10.5 -11 09 12           ~ 2 0
3 [MCM2012] SA6 gLS 02 03 20.4 -07 34 51           ~ 3 0
4 [MCM2012] SA8 gLS 02 04 54.5 -10 24 02           ~ 2 0
5 [MCM2012] SA9 gLS 02 05 03.1 -11 05 47           ~ 2 0
6 [MCM2012] SA10 gLS 02 06 48.5 -06 57 01           ~ 2 0
7 [MCM2012] SA11 gLS 02 08 15.7 -07 24 58           ~ 2 0
8 [MCM2012] SA12 gLS 02 08 16.9 -09 36 53           ~ 2 0
9 [MCM2012] SA13 gLS 02 08 41.6 -07 01 28           ~ 2 0
10 [MCM2012] SA15 gLS 02 09 57.7 -03 54 57           ~ 2 0
11 [MCM2012] SA18 gLS 02 11 08.7 -10 12 14           ~ 2 0
12 [MCM2012] SA21 gLS 02 13 24.5 -07 43 55           ~ 2 0
13 [MCM2012] SA22 gLS 02 14 08.1 -05 35 32           ~ 4 0
14 [MCM2012] SA23 gLS 02 14 11.2 -04 05 03           ~ 3 0
15 [MCM2012] SA26 gLS 02 16 04.7 -09 35 07           ~ 2 0
16 [MCM2012] SA27 gLS 02 16 24.0 -09 57 39           ~ 2 0
17 [MCM2012] SA28 gLS 02 16 31.2 -07 31 57           ~ 2 0
18 [MCM2012] SA29 gLS 02 16 46.8 -09 18 17           ~ 2 0
19 [MCM2012] SA30 gLS 02 16 49.2 -07 03 24           ~ 2 0
20 [MCM2012] SA31 gLS 02 17 23.8 -10 15 50           ~ 2 0
21 [MCM2012] SA33 gLS 02 18 07.3 -05 15 36           ~ 3 0
22 [MCM2012] SA35 gLS 02 19 09.9 -04 01 43           ~ 2 0
23 [MCM2012] SA36 gLS 02 19 56.4 -05 27 59           ~ 2 0
24 [MCM2012] SA37 gLS 02 20 43.1 -10 52 16           ~ 2 0
25 [MCM2012] SA39 gLS 02 21 51.2 -06 47 33           ~ 5 0
26 [MCM2012] SA41 gLS 02 23 18.3 -10 58 48           ~ 2 0
27 [MCM2012] SA42 gLS 02 24 00.9 -03 46 26           ~ 2 0
28 [MCM2012] SA45 gLS 02 24 35.3 -04 01 58           ~ 2 0
29 [MCM2012] SA47 gLS 02 24 59.2 -04 01 04           ~ 2 0
30 [MCM2012] SA48 gLS 02 25 11.0 -04 54 34           ~ 2 0
31 [MCM2012] SA49 gLS 02 25 38.7 -04 03 20           ~ 2 0
32 [MCM2012] SA50 gLS 02 25 46.1 -07 37 39           ~ 4 0
33 [MCM2012] SA52 gLS 02 27 20.2 -07 49 20           ~ 2 0
34 [MCM2012] SA53 gLS 02 27 59.2 -09 07 30           ~ 2 0
35 [MCM2012] SA54 gLS 02 28 32.0 -09 49 45           ~ 2 0
36 [MCM2012] SA55 gLS 02 29 17.4 -05 54 06           ~ 2 0
37 [MCM2012] SA56 gLS 02 30 40.0 -03 50 28           ~ 2 0
38 [MCM2012] SA58 gLS 02 32 23.8 -08 50 38           ~ 2 0
39 [MCM2012] SA59 gLS 02 33 07.0 -04 38 38           ~ 2 0
40 [MCM2012] SA61 gLS 08 48 23.7 -04 07 15           ~ 2 0
41 [MCM2012] SA63 gLS 08 52 07.2 -03 43 16           ~ 4 0
42 [MCM2012] SA66 gLS 08 54 46.5 -01 21 37           ~ 4 0
43 ACT-CL J0854.7-0122 GrG 08 54 46.5480 -01 21 37.262           ~ 12 0
44 [MCM2012] SA67 gLS 08 55 59.9 -04 09 18           ~ 2 0
45 [MCM2012] SA68 gLS 08 57 26.9 -02 42 27           ~ 2 0
46 [MCM2012] SA70 gLS 08 57 49.1 -01 13 01           ~ 2 0
47 [MCM2012] SA72 gLS 08 59 14.6 -03 45 15           ~ 4 0
48 [MCM2012] SA74 gLS 09 00 50.1 -02 30 54           ~ 2 0
49 XCLASS 2686 GrG 09 41 34.747 -11 00 54.33           ~ 6 0
50 [FKC2008] COSMOS 5939+3044 gLS 09 59 39.1 +02 30 44           ~ 4 0
51 [MCM2012] SA79 gLS 09 59 42.4 +02 29 56           ~ 2 0
52 [MCM2012] SA80 gLS 09 59 56.0 +02 19 02           ~ 4 0
53 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0
54 [FKC2008] COSMOS 0211+1139 gLS 10 02 11.2 +02 11 39           ~ 7 0
55 [MCM2012] SA84 gLS 10 02 11.7 +02 29 55           ~ 2 0
56 [MCM2012] SA86 gLS 13 56 49.3 +55 27 07           ~ 2 0
57 [MCM2012] SA87 gLS 13 57 25.5 +53 17 44           ~ 2 0
58 [MCM2012] SA89 gLS 14 00 40.2 +56 07 49           ~ 2 0
59 [MCM2012] SA90 gLS 14 01 10.5 +56 54 21           ~ 2 0
60 [MCM2012] SA91 gLS 14 01 44.9 +53 02 10           ~ 2 0
61 [MCM2012] SA92 gLS 14 01 56.4 +55 44 47           ~ 2 0
62 [MCM2012] SA94 gLS 14 03 51.7 +57 23 50           ~ 2 0
63 [MCM2012] SA95 gLS 14 04 54.5 +52 00 25           ~ 2 0
64 [MCM2012] SA96 gLS 14 05 54.3 +54 45 49           ~ 2 0
65 [MCM2012] SA97 gLS 14 08 13.8 +54 29 08           ~ 3 0
66 [MCM2012] SA98 gLS 14 11 20.5 +52 12 10           ~ 2 0
67 [MCM2012] SA99 gLS 14 13 55.4 +53 43 45           ~ 2 0
68 [MCM2012] SA100 gLS 14 14 47.2 +54 47 04           ~ 2 0
69 [MCM2012] SA101 gLS 14 16 44.5 +56 42 16           ~ 2 0
70 [MCM2012] SA102 gLS 14 19 12.2 +53 26 11           ~ 2 0
71 [MCM2012] SA103 gLS 14 19 17.2 +51 17 29           ~ 2 0
72 [MCM2012] SA104 gLS 14 21 02.6 +52 29 43           ~ 2 0
73 [MCM2012] SA106 gLS 14 22 58.3 +51 24 40           ~ 2 0
74 [MCM2012] SA108 gLS 14 25 44.3 +57 07 24           ~ 2 0
75 [MCM2012] SA109 gLS 14 26 08.0 +57 45 24           ~ 2 0
76 [MCM2012] SA110 gLS 14 28 10.5 +56 39 48           ~ 2 0
77 [MCM2012] SA111 gLS 14 28 34.8 +52 13 06           ~ 2 0
78 [MCM2012] SA112 gLS 14 30 00.7 +55 46 48           ~ 4 0
79 [MCM2012] SA113 gLS 14 31 39.8 +55 33 23           ~ 2 0
80 [MCM2012] SA114 gLS 14 31 52.7 +57 28 37           ~ 2 0
81 [MCM2012] SA116 gLS 14 34 34.7 +56 59 20           ~ 2 0
82 [MCM2012] SA117 gLS 22 01 51.8 +04 10 08           ~ 2 0
83 [MCM2012] SA120 gLS 22 05 06.9 +01 47 04           ~ 2 0
84 [MCM2012] SA121 gLS 22 06 42.0 +04 11 31           ~ 2 0
85 [MCM2012] SA122 gLS 22 13 06.9 -00 30 37           ~ 2 0
86 [MCM2012] SA123 gLS 22 13 31.9 +00 48 36           ~ 4 0
87 [MCM2012] SA124 gLS 22 14 09.6 -17 30 56           ~ 2 0
88 [MCM2012] SA125 gLS 22 14 18.8 +01 10 34           ~ 2 0
89 [MCM2012] SA127 gLS 22 21 43.7 -00 53 03           ~ 4 0

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