Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing

We present and characterize the galaxy-galaxy lensing signal measured using the first three years of data from the Dark Energy Survey (DES Y3) covering 4132 deg2. These galaxy-galaxy measurements are used in the DES Y3 3 × 2 pt cosmological analysis, which combines weak lensing and galaxy clustering...

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Detalles Bibliográficos
Autores: Prat, J., DES Collaboration, Giannantonio, T., Paz-Chinchón, F.
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/706186
Acceso en línea:http://hdl.handle.net/10486/706186
https://dx.doi.org/10.1103/PhysRevD.105.083528
Access Level:acceso abierto
Palabra clave:Weak
Gravitational Lensing
Dark Energy
Física
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spelling Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensingPrat, J.DES CollaborationGiannantonio, T.Paz-Chinchón, F.WeakGravitational LensingDark EnergyFísicaWe present and characterize the galaxy-galaxy lensing signal measured using the first three years of data from the Dark Energy Survey (DES Y3) covering 4132 deg2. These galaxy-galaxy measurements are used in the DES Y3 3 × 2 pt cosmological analysis, which combines weak lensing and galaxy clustering information. We use two lens samples: a magnitude-limited sample and the redmagic sample, which span the redshift range ∼0.2-1 with 10.7 and 2.6 M galaxies, respectively. For the source catalog, we use the metacalibration shape sample, consisting of ≃100 M galaxies separated into four tomographic bins. Our galaxy-galaxy lensing estimator is the mean tangential shear, for which we obtain a total SNR of ∼148 for maglim (∼120 for redmagic), and ∼67 (∼55) after applying the scale cuts of 6 Mpc/h. Thus we reach percent-level statistical precision, which requires that our modeling and systematic-error control be of comparable accuracy. The tangential shear model used in the 3 × 2 pt cosmological analysis includes lens magnification, a five-parameter intrinsic alignment model, marginalization over a point mass to remove information from small scales and a linear galaxy bias model validated with higher-order terms. We explore the impact of these choices on the tangential shear observable and study the significance of effects not included in our model, such as reduced shear, source magnification, and source clustering. We also test the robustness of our measurements to various observational and systematics effects, such as the impact of observing conditions, lens-source clustering, random-point subtraction, scale-dependent metacalibration responses, point spread function residuals, and B modesAmerican Physical SocietyDepartamento de Física TeóricaFacultad de Ciencias20222022-04-26research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/706186https://dx.doi.org/10.1103/PhysRevD.105.083528reponame: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:10486/7061862026-06-23T12:46:27Z
dc.title.none.fl_str_mv Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
title Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
spellingShingle Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
Prat, J.
Weak
Gravitational Lensing
Dark Energy
Física
title_short Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
title_full Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
title_fullStr Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
title_full_unstemmed Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
title_sort Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
dc.creator.none.fl_str_mv Prat, J.
DES Collaboration
Giannantonio, T.
Paz-Chinchón, F.
author Prat, J.
author_facet Prat, J.
DES Collaboration
Giannantonio, T.
Paz-Chinchón, F.
author_role author
author2 DES Collaboration
Giannantonio, T.
Paz-Chinchón, F.
author2_role author
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 We present and characterize the galaxy-galaxy lensing signal measured using the first three years of data from the Dark Energy Survey (DES Y3) covering 4132 deg2. These galaxy-galaxy measurements are used in the DES Y3 3 × 2 pt cosmological analysis, which combines weak lensing and galaxy clustering information. We use two lens samples: a magnitude-limited sample and the redmagic sample, which span the redshift range ∼0.2-1 with 10.7 and 2.6 M galaxies, respectively. For the source catalog, we use the metacalibration shape sample, consisting of ≃100 M galaxies separated into four tomographic bins. Our galaxy-galaxy lensing estimator is the mean tangential shear, for which we obtain a total SNR of ∼148 for maglim (∼120 for redmagic), and ∼67 (∼55) after applying the scale cuts of 6 Mpc/h. Thus we reach percent-level statistical precision, which requires that our modeling and systematic-error control be of comparable accuracy. The tangential shear model used in the 3 × 2 pt cosmological analysis includes lens magnification, a five-parameter intrinsic alignment model, marginalization over a point mass to remove information from small scales and a linear galaxy bias model validated with higher-order terms. We explore the impact of these choices on the tangential shear observable and study the significance of effects not included in our model, such as reduced shear, source magnification, and source clustering. We also test the robustness of our measurements to various observational and systematics effects, such as the impact of observing conditions, lens-source clustering, random-point subtraction, scale-dependent metacalibration responses, point spread function residuals, and B modes
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-04-26
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/10486/706186
https://dx.doi.org/10.1103/PhysRevD.105.083528
url http://hdl.handle.net/10486/706186
https://dx.doi.org/10.1103/PhysRevD.105.083528
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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