2014ApJ...795..163U


Query : 2014ApJ...795..163U

2014ApJ...795..163U - Astrophys. J., 795, 163 (2014/November-2)

CLASH: weak-lensing shear-and-magnification analysis of 20 galaxy clusters.

UMETSU K., MEDEZINSKI E., NONINO M., MERTEN J., POSTMAN M., MENEGHETTI M., DONAHUE M., CZAKON N., MOLINO A., SEITZ S., GRUEN D., LEMZE D., BALESTRA I., BENITEZ N., BIVIANO A., BROADHURST T., FORD H., GRILLO C., KOEKEMOER A., MELCHIOR P., MERCURIO A., MOUSTAKAS J., ROSATI P. and ZITRIN A.

Abstract (from CDS):

We present a joint shear-and-magnification weak-lensing analysis of a sample of 16 X-ray-regular and 4 high-magnification galaxy clusters at 0.19 ≲ z ≲ 0.69 selected from the Cluster Lensing And Supernova survey with Hubble (CLASH). Our analysis uses wide-field multi-color imaging, taken primarily with Suprime-Cam on the Subaru Telescope. From a stacked-shear-only analysis of the X-ray-selected subsample, we detect the ensemble-averaged lensing signal with a total signal-to-noise ratio of ≃ 25 in the radial range of 200-3500 kpc h–1, providing integrated constraints on the halo profile shape and concentration-mass relation. The stacked tangential-shear signal is well described by a family of standard density profiles predicted for dark-matter-dominated halos in gravitational equilibrium, namely, the Navarro-Frenk-White (NFW), truncated variants of NFW, and Einasto models. For the NFW model, we measure a mean concentration of C200c = 4.01–0.32+0.35 at an effective halo mass of M200c = 1.34–0.09+0.10 x M{dot}o. We show that this is in excellent agreement with Λ cold dark matter (ΛCDM) predictions when the CLASH X-ray selection function and projection effects are taken into account. The best-fit Einasto shape parameter is αE = 0.191–0.068+0.071, which is consistent with the NFW-equivalent Einasto parameter of ∼0.18. We reconstruct projected mass density profiles of all CLASH clusters from a joint likelihood analysis of shear-and-magnification data and measure cluster masses at several characteristic radii assuming an NFW density profile. We also derive an ensemble-averaged total projected mass profile of the X-ray-selected subsample by stacking their individual mass profiles. The stacked total mass profile, constrained by the shear+magnification data, is shown to be consistent with our shear-based halo-model predictions, including the effects of surrounding large-scale structure as a two-halo term, establishing further consistency in the context of the ΛCDM model.

Abstract Copyright:

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

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ACO 209 ClG 01 31 57.5 -13 34 35           ~ 260 0
2 ACO 383 ClG 02 48 06.9 -03 29 32           ~ 312 0
3 ClG J0329-0212 ClG 03 29 41.6 -02 11 47           ~ 116 0
4 MCS J0416.1-2403 ClG 04 16 08.380 -24 04 20.80           ~ 242 0
5 ClG J0429-0253 ClG 04 29 36.0 -02 53 09           ~ 104 0
6 ClG J0647+7015 ClG 06 47 50.0 +70 14 55           ~ 131 0
7 ClG J0717+3745 ClG 07 17 36.50 +37 45 23.0           ~ 387 0
8 B3 0714+378 Rad 07 17 36.50 +37 45 23.0           ~ 169 2
9 ClG J0744+3927 ClG 07 44 52.5 +39 27 30           ~ 166 0
10 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 234 0
11 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2319 0
12 MCS J1115.8+0129 ClG 11 15 52.1 +01 29 53           ~ 110 0
13 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 351 0
14 MCS J1206.2-0847 ClG 12 06 12.2 -08 48 02           ~ 195 0
15 ClG J1347-1145 ClG 13 47 33.5 -11 45 42           ~ 491 0
16 LEDA 1900245 Bla 15 32 53.780 +30 20 59.41   19.1   15.7   ~ 136 0
17 ACO 2142 ClG 15 58 20.00 +27 14 00.3           ~ 698 0
18 ClG J1720+3536 ClG 17 20 16.8 +35 36 27           ~ 122 1
19 ACO 2261 ClG 17 22 28.3 +32 09 13           ~ 303 0
20 ClG J1931-2635 ClG 19 31 49.6 -26 34 33           ~ 137 0
21 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 230 0
22 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 356 0
23 ACO S 1063 ClG 22 48 54.3 -44 31 07           ~ 227 0

    Equat.    Gal    SGal    Ecl

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2021.07.27-20:48:05

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