Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty

This work and its companion paper, Amon et al. [Phys. Rev. D 105, 023514 (2022)PRVDAQ2470-001010.1103/PhysRevD.105.023514], present cosmic shear measurements and cosmological constraints from over 100 million source galaxies in the Dark Energy Survey (DES) Year 3 data. We constrain the lensing ampli...

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Detalhes bibliográficos
Autores: Secco, L. F., DES Collaboration, García-Bellido Capdevila, Juan
Formato: artículo
Fecha de publicación:2022
País:España
Recursos:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/706143
Acesso em linha:http://hdl.handle.net/10486/706143
https://dx.doi.org/10.1103/PhysRevD.105.023515
Access Level:acceso abierto
Palavra-chave:Weak
Gravitational Lensing
Dark Energy
Física
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spelling Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertaintySecco, L. F.DES CollaborationGarcía-Bellido Capdevila, JuanWeakGravitational LensingDark EnergyFísicaThis work and its companion paper, Amon et al. [Phys. Rev. D 105, 023514 (2022)PRVDAQ2470-001010.1103/PhysRevD.105.023514], present cosmic shear measurements and cosmological constraints from over 100 million source galaxies in the Dark Energy Survey (DES) Year 3 data. We constrain the lensing amplitude parameter S8 ≡ σ8 √ωm/0.3 at the 3% level in ΛCDM: S8 = 0.759-0.023+0.025 (68% CL). Our constraint is at the 2% level when using angular scale cuts that are optimized for the ΛCDM analysis: S8=0.772-0.017+0.018 (68% CL). With cosmic shear alone, we find no statistically significant constraint on the dark energy equation-of-state parameter at our present statistical power. We carry out our analysis blind, and compare our measurement with constraints from two other contemporary weak lensing experiments: the Kilo-Degree Survey (KiDS) and Hyper-Suprime Camera Subaru Strategic Program (HSC). We additionally quantify the agreement between our data and external constraints from the Cosmic Microwave Background (CMB). Our DES Y3 result under the assumption of ΛCDM is found to be in statistical agreement with Planck 2018, although favors a lower S8 than the CMB-inferred value by 2.3σ (a p-value of 0.02). This paper explores the robustness of these cosmic shear results to modeling of intrinsic alignments, the matter power spectrum and baryonic physics. We additionally explore the statistical preference of our data for intrinsic alignment models of different complexity. The fiducial cosmic shear model is tested using synthetic data, and we report no biases greater than 0.3σ in the plane of S8 × ωm caused by uncertainties in the theoretical modelsAmerican Physical SocietyDepartamento de Física TeóricaFacultad de Ciencias20222022-04-06research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/706143https://dx.doi.org/10.1103/PhysRevD.105.023515reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7061432026-06-23T12:46:27Z
dc.title.none.fl_str_mv Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
title Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
spellingShingle Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
Secco, L. F.
Weak
Gravitational Lensing
Dark Energy
Física
title_short Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
title_full Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
title_fullStr Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
title_full_unstemmed Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
title_sort Dark Energy Survey Year 3 results: Cosmology from cosmic shear and robustness to modeling uncertainty
dc.creator.none.fl_str_mv Secco, L. F.
DES Collaboration
García-Bellido Capdevila, Juan
author Secco, L. F.
author_facet Secco, L. F.
DES Collaboration
García-Bellido Capdevila, Juan
author_role author
author2 DES Collaboration
García-Bellido Capdevila, Juan
author2_role author
author
dc.contributor.none.fl_str_mv Departamento de Física Teórica
Facultad de Ciencias
dc.subject.none.fl_str_mv Weak
Gravitational Lensing
Dark Energy
Física
topic Weak
Gravitational Lensing
Dark Energy
Física
description This work and its companion paper, Amon et al. [Phys. Rev. D 105, 023514 (2022)PRVDAQ2470-001010.1103/PhysRevD.105.023514], present cosmic shear measurements and cosmological constraints from over 100 million source galaxies in the Dark Energy Survey (DES) Year 3 data. We constrain the lensing amplitude parameter S8 ≡ σ8 √ωm/0.3 at the 3% level in ΛCDM: S8 = 0.759-0.023+0.025 (68% CL). Our constraint is at the 2% level when using angular scale cuts that are optimized for the ΛCDM analysis: S8=0.772-0.017+0.018 (68% CL). With cosmic shear alone, we find no statistically significant constraint on the dark energy equation-of-state parameter at our present statistical power. We carry out our analysis blind, and compare our measurement with constraints from two other contemporary weak lensing experiments: the Kilo-Degree Survey (KiDS) and Hyper-Suprime Camera Subaru Strategic Program (HSC). We additionally quantify the agreement between our data and external constraints from the Cosmic Microwave Background (CMB). Our DES Y3 result under the assumption of ΛCDM is found to be in statistical agreement with Planck 2018, although favors a lower S8 than the CMB-inferred value by 2.3σ (a p-value of 0.02). This paper explores the robustness of these cosmic shear results to modeling of intrinsic alignments, the matter power spectrum and baryonic physics. We additionally explore the statistical preference of our data for intrinsic alignment models of different complexity. The fiducial cosmic shear model is tested using synthetic data, and we report no biases greater than 0.3σ in the plane of S8 × ωm caused by uncertainties in the theoretical models
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-04-06
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/706143
https://dx.doi.org/10.1103/PhysRevD.105.023515
url http://hdl.handle.net/10486/706143
https://dx.doi.org/10.1103/PhysRevD.105.023515
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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