Analytical and EZmock covariance validation for the DESI 2024 results

D. Forero-Sánchez et al. -- Dark energy spectroscopic instrument (DESI) survey year 1 results. -- ArXiv ePrint: 2411.12027

Detalles Bibliográficos
Autores: Forero Sánchez, Daniel, Gil-Marín, Héctor, Gaztañaga, Enrique
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/391050
Acceso en línea:http://hdl.handle.net/10261/391050
https://api.elsevier.com/content/abstract/scopus_id/105003121194
Access Level:acceso abierto
Palabra clave:Baryon acoustic oscillations
Cosmological parameters from LSS
Cosmological simulations
Redshift surveys
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oai_identifier_str oai:digital.csic.es:10261/391050
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv Analytical and EZmock covariance validation for the DESI 2024 results
04(2025)055
title Analytical and EZmock covariance validation for the DESI 2024 results
spellingShingle Analytical and EZmock covariance validation for the DESI 2024 results
Forero Sánchez, Daniel
Baryon acoustic oscillations
Cosmological parameters from LSS
Cosmological simulations
Redshift surveys
title_short Analytical and EZmock covariance validation for the DESI 2024 results
title_full Analytical and EZmock covariance validation for the DESI 2024 results
title_fullStr Analytical and EZmock covariance validation for the DESI 2024 results
title_full_unstemmed Analytical and EZmock covariance validation for the DESI 2024 results
title_sort Analytical and EZmock covariance validation for the DESI 2024 results
dc.creator.none.fl_str_mv Forero Sánchez, Daniel
Gil-Marín, Héctor
Gaztañaga, Enrique
author Forero Sánchez, Daniel
author_facet Forero Sánchez, Daniel
Gil-Marín, Héctor
Gaztañaga, Enrique
author_role author
author2 Gil-Marín, Héctor
Gaztañaga, Enrique
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Forero Sánchez, Daniel [0000-0001-5957-332X]
Gil-Marín, Héctor [0000-0003-0265-6217]
Gaztañaga, Enrique [0000-0001-9632-0815]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Baryon acoustic oscillations
Cosmological parameters from LSS
Cosmological simulations
Redshift surveys
topic Baryon acoustic oscillations
Cosmological parameters from LSS
Cosmological simulations
Redshift surveys
description D. Forero-Sánchez et al. -- Dark energy spectroscopic instrument (DESI) survey year 1 results. -- ArXiv ePrint: 2411.12027
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/391050
https://api.elsevier.com/content/abstract/scopus_id/105003121194
url http://hdl.handle.net/10261/391050
https://api.elsevier.com/content/abstract/scopus_id/105003121194
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI 10.1088/1475-7516/2025/04/055
https://doi.org/10.1088/1475-7516/2025/04/055
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Analytical and EZmock covariance validation for the DESI 2024 results04(2025)055Forero Sánchez, DanielGil-Marín, HéctorGaztañaga, EnriqueBaryon acoustic oscillationsCosmological parameters from LSSCosmological simulationsRedshift surveysD. Forero-Sánchez et al. -- Dark energy spectroscopic instrument (DESI) survey year 1 results. -- ArXiv ePrint: 2411.12027The estimation of uncertainties in cosmological parameters is an important challenge in Large-Scale-Structure (LSS) analyses. For standard analyses such as Baryon Acoustic Oscillations (BAO) and Full-Shape two approaches are usually considered. First: analytical estimates of the covariance matrix use Gaussian approximations and (nonlinear) clustering measurements to estimate the matrix, which allows a relatively fast and computationally cheap way to generate matrices that adapt to an arbitrary clustering measurement. On the other hand, sample covariances are an empirical estimate of the matrix based on an ensemble of clustering measurements from fast and approximate simulations. While more computationally expensive due to the large amount of simulations and volume required, these allow us to take into account systematics that are impossible to model analytically. In this work we compare these two approaches in order to enable DESI's key analyses. We find that the configuration space analytical estimate performs satisfactorily in BAO analyses and its flexibility in terms of input clustering makes it the fiducial choice for DESI's 2024 BAO analysis. On the contrary, the analytical computation of the covariance matrix in Fourier space does not reproduce the expected measurements in terms of Full-Shape analyses, which motivates the use of a corrected mock covariance for DESI's 2024 Full Shape analysis.DFS acknowledges support from the Swiss National Science Foundation (SNF) “Cosmology with 3D Maps of the Universe” research grant, 200020_175751 and 200020_207379. H-JS acknowledges support from the U.S. Department of Energy, Office of Science, Office of High Energy Physics under grant No. DE-SC0023241. This material is based upon work supported by the U.S. Department of Energy (DOE), Office of Science, Office of High-Energy Physics, under Contract No. DE-AC02-05CH11231, and by the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility under the same contract. Additional support for DESI was provided by the U.S. National Science Foundation (NSF), Division of Astronomical Sciences under Contract No. AST-0950945 to the NSF’s National Optical-Infrared Astronomy Research Laboratory; the Science and Technology Facilities Council of the United Kingdom; the Gordon and Betty Moore Foundation; the Heising-Simons Foundation; the French Alternative Energies and Atomic Energy Commission (CEA); the National Council of Humanities, Science and Technology of Mexico (CONACYT); the Ministry of Science and Innovation of Spain (MICINN), and by the DESI Member Institutions: https://www.desi.lbl.gov/collaborating-institutions. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the U.S. National Science Foundation, the U.S. Department of Energy, or any of the listed funding agencies. The authors are honored to be permitted to conduct scientific research on Iolkam Du’ag (Kitt Peak), a mountain with particular significance to the Tohono O’odham Nation.Peer reviewedIOP PublishingMinisterio de Ciencia e Innovación (España)Forero Sánchez, Daniel [0000-0001-5957-332X]Gil-Marín, Héctor [0000-0003-0265-6217]Gaztañaga, Enrique [0000-0001-9632-0815]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/391050https://api.elsevier.com/content/abstract/scopus_id/105003121194reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésThe underlying dataset has been published as supplementary material of the article in the publisher platform at DOI 10.1088/1475-7516/2025/04/055https://doi.org/10.1088/1475-7516/2025/04/055Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3910502026-05-22T06:33:51Z
score 15,81155

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