2022A&A...657A..83C


Query : 2022A&A...657A..83C

2022A&A...657A..83C - Astronomy and Astrophysics, volume 657A, 83-83 (2022/1-1)

Galaxy cluster strong lensing cosmography. Cosmological constraints from a sample of regular galaxy clusters.

CAMINHA G.B., SUYU S.H., GRILLO C. and ROSATI P.

Abstract (from CDS):

Cluster strong lensing cosmography is a promising probe of the background geometry of the Universe and several studies have emerged thanks to the increased quality of observations using space- and ground-based telescopes. For the first time, we used a sample of five cluster strong lenses to measure the values of cosmological parameters and combine them with those from classical probes. In order to assess the degeneracies and the effectiveness of strong-lensing cosmography in constraining the background geometry of the Universe, we adopted four cosmological scenarios. We found good constraining power on the total matter density of the Universe (Ωm) and the equation of state of the dark energy parameter w. For a flat wCDM cosmology, we found Ωm=0.30–0.11+0.09 and w=-1.12–0.32+0.17 from strong lensing only. Interestingly, we show that the constraints from the cosmic microwave background (CMB) are improved by factors of 2.5 and 4.0 on Ωm and w, respectively, when combined with our posterior distributions in this cosmological model. In a scenario where the equation of state of dark energy evolves with redshift, the strong lensing constraints are compatible with a cosmological constant (i.e. w = -1). In a curved cosmology, our strong lensing analyses can accommodate a large range of values for the curvature of the Universe of Ωk=0.28–0.21+0.16. In all cosmological scenarios, we show that our strong lensing constraints are complementary and in good agreement with measurements from the CMB, baryon acoustic oscillations, and Type Ia supernovae. Our results show that cluster strong lensing cosmography is a potentially powerful probe to be included in the cosmological analyses of future surveys.

Abstract Copyright: © G. B. Caminha et al. 2022

Journal keyword(s): cosmology: observations - cosmological parameters - dark energy - gravitational lensing: strong - galaxies: clusters: general

VizieR on-line data: <Available at CDS (J/A+A/657/A83): list.dat cosmo_chains/* massandcosmo_chains/*>

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 688 0
2 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 713 0
3 ClG J0329-0212 ClG 03 29 41.6 -02 11 47           ~ 131 0
4 MCS J0416.1-2403 ClG 04 16 08.380 -24 04 20.80           ~ 289 0
5 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 412 0
6 MCS J1206.2-0847 ClG 12 06 12.2 -08 48 02           ~ 222 0
7 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1093 0
8 ClG J1931-2635 ClG 19 31 49.6 -26 34 33           ~ 150 0
9 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 252 0
10 ACO S 1063 ClG 22 48 54.3 -44 31 07           ~ 283 0

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2023.01.30-22:48:00

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