Dark energy survey year 3 results: Cosmology with peaks using an emulator approach

• DOI: 10.1093/mnras/stac078
• Publication Date: 2022-01-11T12:18:28Z
• Authors: D Zürcher; J Fluri; R Sgier; T Kacprzak; M Gatti; C Doux; L Whiteway; A Réfrégier; C Chang; N Jeffrey; B Jain; P Lemos; D Bacon; A Alarcon; A Amon; K Bechtol; M Becker; G Bernstein; A Campos; R Chen; A Choi; C Davis; J Derose; S Dodelson; F Elsner; J Elvin-Poole; S Everett; A Ferte; D Gruen; I Harrison; D Huterer; M Jarvis; P F Leget; N Maccrann; J Mccullough; J Muir; J Myles; A Navarro Alsina; S Pandey; J Prat; M Raveri; R P Rollins; A Roodman; C Sanchez; L F Secco; E Sheldon; T Shin; M Troxel; I Tutusaus; B Yin; M Aguena; S Allam; F Andrade-Oliveira; J Annis; E Bertin; D Brooks; D Burke; A Carnero Rosell; M Carrasco Kind; J Carretero; F Castander; R Cawthon; C Conselice; M Costanzi; L da Costa; M E da Silva Pereira; T Davis; J De Vicente; S Desai; H T Diehl; J Dietrich; P Doel; K Eckert; A Evrard; I Ferrero; B Flaugher; P Fosalba; D Friedel; J Frieman; J Garcia-Bellido; E Gaztanaga; D Gerdes; T Giannantonio; R Gruendl; J Gschwend; G Gutierrez; S Hinton; D L Hollowood; K Honscheid; B Hoyle; D James; K Kuehn; N Kuropatkin; O Lahav; C Lidman; M Lima; M Maia; J Marshall; P Melchior; F Menanteau; R Miquel; R Morgan; A Palmese; F Paz-Chinchon; A Pieres; A Plazas Malagón; K Reil; M Rodriguez Monroy; K Romer; E Sanchez; V Scarpine; M Schubnell; S Serrano; I Sevilla; M Smith; E Suchyta; G Tarle; D Thomas; C To; T N Varga; J Weller; R Wilkinson
• Keywords: Observational cosmology

We constrain the matter density $\Omega_{\mathrm{m}}$ and amplitude of fluctuations $\sigma_8$ within $\Lambda$CDM cosmological model with shear peak statistics angular convergence power spectra using mass maps constructed from first three years data Dark Energy Survey (DES Y3). use tomographic statistics, including cross-peaks: counts calculated on created by taking a harmonic space product two redshift bins. Our analysis follows forward-modelling scheme to create likelihood these N-body simulations, Gaussian process emulator. include following lensing systematics: multiplicative bias, photometric uncertainty, galaxy intrinsic alignment. Stringent scale cuts are applied avoid biases unmodelled baryonic physics. find that additional non-Gaussian information leads tightening constraints structure growth parameter yielding $S_8~\equiv~\sigma_8\sqrt{\Omega_{\mathrm{m}}/0.3}~=~0.797_{-0.013}^{+0.015}$ (68% confidence limits), precision 1.8%, an improvement ~38% compared only case. The results obtained found be in agreement each other no significant difference $S_8$ is recorded. mild tension $1.5 \thinspace \sigma$ between our study Planck 2018, lower $S_8$. Furthermore, we observe combination breaks degeneracy alignment $A_{\mathrm{IA}}$ $S_8$, improving constraints. run suite tests concluding robust consistent studies DES Y3 data.