English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We use cosmological constraints from current data sets and a figure of merit(FoM) approach to probe any deviations from general relativity (GR) atcosmological scales. The FoM approach is used to study the constraining powerof various combinations of data sets on modified gravity (MG) parameters. Weuse recently refined HST-COSMOS weak-lensing tomography data, ISW-galaxy crosscorrelations from 2MASS and SDSS LRG surveys, matter power spectrum fromSDSS-DR7 (MPK), WMAP7 temperature and polarization spectra, BAO from 2DF andSDSS-DR7, and Union2 compilation of supernovae, in addition to other boundsfrom H_0 measurements and BBN. We use 3 parametrizations of MG parameters thatenter the perturbed field equations. In order to allow for variations withredshift and scale, the first 2 parametrizations use recently suggestedfunctional forms while the third is based on binning methods. Using the firstparametrization, we find that CMB + ISW + WL provides the strongest constraintson MG parameters followed by CMB+WL or CMB+MPK+ISW. Using the secondparametrization or binning methods, CMB+MPK+ISW consistently provides some ofthe strongest constraints. This shows that the constraints are parametrizationdependent. We find that adding up current data sets does not improveconsistently uncertainties on MG parameters due to tensions between best-fit MGparameters preferred by different data sets. Furthermore, some functional formsimposed by the parametrizations can lead to an exacerbation of these tensions.Next, unlike some studies that used the CFHTLS lensing data, we do not find anydeviation from GR using the refined HST-COSMOS data, confirming previous claimsin those studies that their result may have been due to some systematic effect.Finally, we find in all cases that the values corresponding to GR are withinthe 95% confidence level contours for all data set combinations. (abridged)

Figures of merit and constraints from testing General Relativity using the latest cosmological data sets including refined COSMOS 3D weak lensing