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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Weak gravitational lensing is a powerful cosmological probe, withnon--Gaussian features potentially containing the majority of the information.We examine constraints on the parameter triplet $(\Omega_m,w,\sigma_8)$ fromnon-Gaussian features of the weak lensing convergence field, including a set ofmoments (up to $4^{\rm th}$ order) and Minkowski functionals, using publiclyavailable data from the 154deg$^2$ CFHTLenS survey. We utilize a suite ofray--tracing N-body simulations spanning 91 points in $(\Omega_m,w,\sigma_8)$parameter space, replicating the galaxy sky positions, redshifts and shapenoise in the CFHTLenS catalogs. We then build an emulator that interpolates thesimulated descriptors as a function of $(\Omega_m,w,\sigma_8)$, and use it tocompute the likelihood function and parameter constraints. We employ aprincipal component analysis to reduce dimensionality and to help stabilize theconstraints with respect to the number of bins used to construct eachstatistic. Using the full set of statistics, we find$\Sigma_8\equiv\sigma_8(\Omega_m/0.27)^{0.55}=0.75\pm0.04$ (68% C.L.), inagreement with previous values. We find that constraints on the$(\Omega_m,\sigma_8)$ doublet from the Minkowski functionals suffer a strongbias. However, high-order moments break the $(\Omega_m,\sigma_8)$ degeneracyand provide a tight constraint on these parameters with no apparent bias. Themain contribution comes from quartic moments of derivatives.

Emulating the CFHTLenS Weak Lensing data: Cosmological Constraints from moments and Minkowski functionals