C.D.S. - SIMBAD4 rel 1.7 - 2021.05.05CEST23:07:20

2015ApJ...802L...9B - Astrophys. J., 802, L9 (2015/March-3)

Quantifying the impact of cosmological parameter uncertainties on strong-lensing models with an eye toward the frontier fields.


Abstract (from CDS):

We test the effects of varying the cosmological parameter values used in the strong lens modeling process for the six Hubble Frontier Field (HFF) galaxy clusters. The standard procedure for generating high-fidelity strong lens models includes careful consideration of uncertainties in the output models that result from varying model parameters within the bounds of available data constraints. It is not, however, common practice to account for the effects of cosmological parameter value uncertainties. The convention is to instead use a single fiducial ''concordance cosmology'' and generate lens models assuming zero uncertainty in cosmological parameter values. We find that the magnification maps of the individual HFF clusters vary significantly when lens models are computed using different cosmological parameter values taken from recent literature constraints from space- and ground-based experiments. Specifically, the magnification maps have average variances across the best-fit models computed using different cosmologies that are comparable in magnitude to–and as much as 2.5x larger than–the model-fitting uncertainties in each best-fit model. We also find that estimates of the mass profiles of the cluster cores themselves vary only slightly when different input cosmological parameters are used. We conclude that cosmological parameter uncertainty is a non-negligible source of uncertainty in lens model products for the HFF clusters and that it is important that current and future work that relies on precision strong-lensing models take care to account for this additional source of uncertainty.

Abstract Copyright:

Journal keyword(s): cosmology: observations - cosmological parameters - galaxies: high-redshift - gravitational lensing: strong

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 601 0
2 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 654 0
3 MCS J0416.1-2403 ClG 04 16 08.380 -24 04 20.80           ~ 239 0
4 ClG J0717+3745 ClG 07 17 36.50 +37 45 23.0           ~ 384 0
5 B3 0714+378 Rad 07 17 36.50 +37 45 23.0           ~ 169 2
6 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 349 0
7 ACO S 1063 ClG 22 48 54.3 -44 31 07           ~ 222 0

    Equat.    Gal    SGal    Ecl

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