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

This paper performs the first cosmological parameter analysis of theKiDS-1000 data with second- and third-order shear statistics. This work buildson a series of papers that describe the roadmap to third-order shearstatistics. We derive and test a combined model of the second-order shearstatistic, namely the COSEBIs and the third-order aperture mass statistics$\langle M_\mathrm{ap}^3\rangle$ in a tomographic set-up. We validate ourpipeline with $N$-body simulations that mock the fourth Kilo Degree survey datarelease. To model the second- and third-order statistics, we use the latestversion of \textsc{HMcode2020} for the power spectrum and \textsc{BiHalofit}for the bispectrum. Furthermore, we use an analytic description to modelintrinsic alignments and hydro-dynamical simulations to model the effect ofbaryonic feedback processes. Lastly, we decreased the dimension of the datavector significantly by considering for the $\langle M_\mathrm{ap}^3\rangle$part of the data vector only equal smoothing radii, making a data analysis ofthe fourth Kilo Degree survey data release using a combined analysis of COSEBIsthird-order shear statistic possible. We first validate the accuracy of ourmodelling by analysing a noise-free mock data vector assuming the KiDS-1000error budget, finding a shift in the maximum-a-posterior of the matter densityparameter $\Delta \Omega_m< 0.02\, \sigma_{\Omega_m}$ and of the structuregrowth parameter $\Delta S_8 < 0.05\, \sigma_{S_8}$. Lastly, we performed thefirst KiDS-1000 cosmological analysis using a combined analysis of second- andthird-order shear statistics, where we constrained$\Omega_m=0.248^{+0.062}_{-0.055}$ and$S_8=\sigma_8\sqrt{\Omega_m/0.3}=0.772\pm0.022$. The geometric average on theerrors of $\Omega_\mathrm{m}$ and $S_8$ of the combined statistics increasedcompared to the second-order statistic by 2.2.

KiDS-1000 cosmology: Combined second- and third-order shear statistics