Model selection using time-delay lenses

doi:10.1093/mnras/stac3682

Model selection using time-delay lenses

2022-12-15

1

OA

AI

DOI：10.1093/mnras/stac3682

Original

Original request for help

Save

Abstract

En 中文

The sample of time-delay gravitational lenses appropriate for studying the geometry of the Universe continues to grow as dedicated campaigns, such as the Dark Energy Survey, the (Very Large Telescope) VLT Survey Telescope (VST) ATLAS survey, and the Large Synoptic Survey Telescope, complete their census of high-redshift sources. This catalogue now includes hundreds of strong lensing systems, at least 31 of which have reasonably accurate time-delay measurements. In this paper, we use them to compare the predictions of two competing Friedmann-Lemai tre-Robertson-Walker models: flat Lambda cold dark matter ( A CDM), characterized by two adjustable parameters ( H-0 and Q(m)), and the R-h = ct universe (with H 0 as the single free variable). Over the past decade, the latter has accounted for the data better than the standard model, most recently the emergence of well-formed galaxies disco v ered by JWST at cosmic dawn. Here, we show that the current sample of time-delay lenses fa v ours R-h = ct with a likelihood of similar to 84 per cent versus similar to 16 per cent for the standard model. This level of accuracy will greatly improve as the ongoing surv e ys unco v er man y thousands of additional lens systems o v er the ne xt sev eral years.

Keywords:

gravitational lensing: strong

large-scale structure of Universe

cosmology: observations

cosmology: theory

Model selection using time-delay lenses

Abstract

Journal

Organization