2007A&A...462..459G


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.14CEST02:03:43

2007A&A...462..459G - Astronomy and Astrophysics, volume 462, 459-471 (2007/2-1)

Weak lensing survey of galaxy clusters in the CFHTLS Deep.

GAVAZZI R. and SOUCAIL G.

Abstract (from CDS):

We present a weak lensing search of galaxy clusters in the 4deg2 of the CFHT Legacy Survey Deep. This work aims at building a mass-selected sample of clusters with well controlled selection effects. This present survey is a preliminary step toward a full implementation in the forthcoming 170deg2 of the CFHTLS Wide survey. We use the deep i' band images observed under subarcsecond seeing conditions to perform weak lensing mass reconstructions and to identify high convergence peaks. Thanks to the availability of deep u*g'r'i'z' exposures, sources are selected from their photometric redshifts in the weak lensing analysis. We also use lensing tomography to derive an estimate of the lens redshift. After considering the raw statistics of peaks we check whether they can be associated to a clear optical counterpart or to published X-ray selected clusters. Among the 14 peaks found above a signal-to-noise detection threshold ν=3.5, nine are secure detections with estimated redshift 0.1≲zl≲0.7 and a velocity dispersion 450≲σv≲700km/s. This low mass range is accessible thanks to the high density of background sources. Considering the intersection between the shear-selected clusters and XMM-LSS X-ray clusters in the D1 field, we observe that the ICM gas in these low-mass clusters (TX∼1-2keV) is not hotter than the temperature inferred from shear, this trend being different for published massive clusters. A more extended weak lensing survey, with higher statistics of mass structures will be a promising way to bypass several of the problems related to standard detection methods based on the complex physics of baryons.

Abstract Copyright:

Journal keyword(s): gravitational lensing - galaxies: clusters: general - cosmology: large-scale structure

Nomenclature: Table 2: [GS2007] Cl-NN (Nos Cl-1 to Cl-14).

Simbad objects: 20

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Number of rows : 20

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 2XLSSd J022404.2-041331 ClG 02 24 04.19 -04 13 26.6           ~ 37 0
2 [BPR2008] WL04 ClG 02 24 27.0 -04 50 34           ~ 10 0
3 XMMXCS J0224.5-0414 ClG 02 24 33.8 -04 14 15           ~ 26 0
4 [BPR2008] WL03 ClG 02 25 24.0 -04 10 48           ~ 3 0
5 RzCS 262 ClG 02 25 24.6 -04 40 45       17.3   ~ 32 0
6 2MASX J02253077-0414183 ClG 02 25 30.6 -04 14 20           ~ 29 0
7 NPM1G -05.0105 G 02 26 09.6703118869 -04 58 05.658450961   16.11   14.75   ~ 22 0
8 XLSSC 011 ClG 02 26 10.60 -04 58 11.5           ~ 23 0
9 RzCS 119 ClG 02 27 09.7 -04 18 05           ~ 26 1
10 [GS2007] Cl-10 ClG 02 27 16.0 -04 07 37           ~ 2 0
11 XLSSU J022725.0-041123 ClG 02 27 24.9 -04 11 31           ~ 8 0
12 XMMXCS J022726.4-043206.8 ClG 02 27 25.9 -04 32 15           ~ 26 0
13 [BPR2008] WL07 ClG 02 27 40.3 -04 51 31           ~ 29 0
14 [GS2007] Cl-09 ClG 09 59 42.0 +02 32 20           ~ 1 0
15 [GS2007] Cl-08 ClG 10 01 21.0 +02 22 58           ~ 2 0
16 [GS2007] Cl-13 ClG 10 01 30.0 +01 53 04           ~ 1 0
17 [GS2007] Cl-06 ClG 14 19 01.0 +52 36 43           ~ 2 0
18 [GS2007] Cl-12 ClG 14 19 02.0 +53 08 44           ~ 2 0
19 [GS2007] Cl-11 ClG 14 20 28.0 +52 59 22           ~ 1 0
20 RBS 1842 ClG 22 16 56.23 -17 25 25.5           ~ 19 0

    Equat.    Gal    SGal    Ecl

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2019.10.14-02:03:43

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