Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking

Autores
Shao, Xiaoyun; Toscano, Facundo Nicolás; Garcia Lambas, Diego Rodolfo; Gonçalves, Rodrigo S.; Bengaly, Carlos A.P.; Luparello, Heliana Estefanía; Hansen, Frode K.; Alcaniz, Jailson
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Cosmic Microwave Background (CMB) reaches homogeneity at relativelymodest angular scales compared to the expectation of the standard ΛCDM model revealingan important challenge to the theoretical predictions. We analyze this inconsistency throughthe homogeneity scale H and the slope of the homogeneity index at θ = 90◦ . We find thatthe removal of low multipoles, in particular the quadrupole, from both the data and theΛCDM synthetic CMB maps, significantly improve the consistency between models andobservations. This adds to indications of the relevant contribution of the low value of theCMB quadrupole to the observed anomalies in the homogeneity scale. Due to the presence ofa new extragalactic foreground in the CMB maps, we have performed statistical analyseswith different masking taking into account the regions mostly affected. In particular weconsider galaxies in the local neighborhood which are expected to affect more significantlythe large angular scales. We find that by masking these regions, the analysis cannot solve thediscrepancy between the observations and the ΛCDM model in spite of a small improvementof their mutual consistency. The studies with both foreground masking and low-ℓ removedCMB maps show similar results than those of the full CMB map indicating that the maindiscrepancy between theory and observations is associated to the quadrupole anomaly andmay require more exhaustive analysis.
Fil: Shao, Xiaoyun. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; Brasil
Fil: Toscano, Facundo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Garcia Lambas, Diego Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Gonçalves, Rodrigo S.. Universidade Federal Rural Do Rio de Janeiro (ufrrj);
Fil: Bengaly, Carlos A.P.. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; Brasil
Fil: Luparello, Heliana Estefanía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Hansen, Frode K.. University of Oslo; Noruega
Fil: Alcaniz, Jailson. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; Brasil
Materia
CMBR theory
cosmological parameters from CMBR
Statistical sampling techniques
Physics of the early universe
Nivel de accesibilidad
acceso embargado
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/279082
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/279082
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground maskingShao, XiaoyunToscano, Facundo NicolásGarcia Lambas, Diego RodolfoGonçalves, Rodrigo S.Bengaly, Carlos A.P.Luparello, Heliana EstefaníaHansen, Frode K.Alcaniz, JailsonCMBR theorycosmological parameters from CMBRStatistical sampling techniquesPhysics of the early universehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The Cosmic Microwave Background (CMB) reaches homogeneity at relativelymodest angular scales compared to the expectation of the standard ΛCDM model revealingan important challenge to the theoretical predictions. We analyze this inconsistency throughthe homogeneity scale H and the slope of the homogeneity index at θ = 90◦ . We find thatthe removal of low multipoles, in particular the quadrupole, from both the data and theΛCDM synthetic CMB maps, significantly improve the consistency between models andobservations. This adds to indications of the relevant contribution of the low value of theCMB quadrupole to the observed anomalies in the homogeneity scale. Due to the presence ofa new extragalactic foreground in the CMB maps, we have performed statistical analyseswith different masking taking into account the regions mostly affected. In particular weconsider galaxies in the local neighborhood which are expected to affect more significantlythe large angular scales. We find that by masking these regions, the analysis cannot solve thediscrepancy between the observations and the ΛCDM model in spite of a small improvementof their mutual consistency. The studies with both foreground masking and low-ℓ removedCMB maps show similar results than those of the full CMB map indicating that the maindiscrepancy between theory and observations is associated to the quadrupole anomaly andmay require more exhaustive analysis.Fil: Shao, Xiaoyun. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; BrasilFil: Toscano, Facundo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Garcia Lambas, Diego Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Gonçalves, Rodrigo S.. Universidade Federal Rural Do Rio de Janeiro (ufrrj);Fil: Bengaly, Carlos A.P.. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; BrasilFil: Luparello, Heliana Estefanía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; ArgentinaFil: Hansen, Frode K.. University of Oslo; NoruegaFil: Alcaniz, Jailson. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; BrasilIOP Publishing2025-09info:eu-repo/date/embargoEnd/2026-03-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/279082Shao, Xiaoyun; Toscano, Facundo Nicolás; Garcia Lambas, Diego Rodolfo; Gonçalves, Rodrigo S.; Bengaly, Carlos A.P.; et al.; Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking; IOP Publishing; Journal of Cosmology and Astroparticle Physics; 2025; 09; 9-2025; 1-211475-7516CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1475-7516/2025/09/002info:eu-repo/semantics/altIdentifier/doi/10.1088/1475-7516/2025/09/002info:eu-repo/semantics/embargoedAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-06T13:47:09Zoai:ri.conicet.gov.ar:11336/279082instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982026-02-06 13:47:09.741CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking
title Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking
spellingShingle Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking
Shao, Xiaoyun
CMBR theory
cosmological parameters from CMBR
Statistical sampling techniques
Physics of the early universe
title_short Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking
title_full Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking
title_fullStr Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking
title_full_unstemmed Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking
title_sort Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking
dc.creator.none.fl_str_mv Shao, Xiaoyun
Toscano, Facundo Nicolás
Garcia Lambas, Diego Rodolfo
Gonçalves, Rodrigo S.
Bengaly, Carlos A.P.
Luparello, Heliana Estefanía
Hansen, Frode K.
Alcaniz, Jailson
author Shao, Xiaoyun
author_facet Shao, Xiaoyun
Toscano, Facundo Nicolás
Garcia Lambas, Diego Rodolfo
Gonçalves, Rodrigo S.
Bengaly, Carlos A.P.
Luparello, Heliana Estefanía
Hansen, Frode K.
Alcaniz, Jailson
author_role author
author2 Toscano, Facundo Nicolás
Garcia Lambas, Diego Rodolfo
Gonçalves, Rodrigo S.
Bengaly, Carlos A.P.
Luparello, Heliana Estefanía
Hansen, Frode K.
Alcaniz, Jailson
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv CMBR theory
cosmological parameters from CMBR
Statistical sampling techniques
Physics of the early universe
topic CMBR theory
cosmological parameters from CMBR
Statistical sampling techniques
Physics of the early universe
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Cosmic Microwave Background (CMB) reaches homogeneity at relativelymodest angular scales compared to the expectation of the standard ΛCDM model revealingan important challenge to the theoretical predictions. We analyze this inconsistency throughthe homogeneity scale H and the slope of the homogeneity index at θ = 90◦ . We find thatthe removal of low multipoles, in particular the quadrupole, from both the data and theΛCDM synthetic CMB maps, significantly improve the consistency between models andobservations. This adds to indications of the relevant contribution of the low value of theCMB quadrupole to the observed anomalies in the homogeneity scale. Due to the presence ofa new extragalactic foreground in the CMB maps, we have performed statistical analyseswith different masking taking into account the regions mostly affected. In particular weconsider galaxies in the local neighborhood which are expected to affect more significantlythe large angular scales. We find that by masking these regions, the analysis cannot solve thediscrepancy between the observations and the ΛCDM model in spite of a small improvementof their mutual consistency. The studies with both foreground masking and low-ℓ removedCMB maps show similar results than those of the full CMB map indicating that the maindiscrepancy between theory and observations is associated to the quadrupole anomaly andmay require more exhaustive analysis.
Fil: Shao, Xiaoyun. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; Brasil
Fil: Toscano, Facundo Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Garcia Lambas, Diego Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Gonçalves, Rodrigo S.. Universidade Federal Rural Do Rio de Janeiro (ufrrj);
Fil: Bengaly, Carlos A.P.. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; Brasil
Fil: Luparello, Heliana Estefanía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
Fil: Hansen, Frode K.. University of Oslo; Noruega
Fil: Alcaniz, Jailson. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; Brasil
description The Cosmic Microwave Background (CMB) reaches homogeneity at relativelymodest angular scales compared to the expectation of the standard ΛCDM model revealingan important challenge to the theoretical predictions. We analyze this inconsistency throughthe homogeneity scale H and the slope of the homogeneity index at θ = 90◦ . We find thatthe removal of low multipoles, in particular the quadrupole, from both the data and theΛCDM synthetic CMB maps, significantly improve the consistency between models andobservations. This adds to indications of the relevant contribution of the low value of theCMB quadrupole to the observed anomalies in the homogeneity scale. Due to the presence ofa new extragalactic foreground in the CMB maps, we have performed statistical analyseswith different masking taking into account the regions mostly affected. In particular weconsider galaxies in the local neighborhood which are expected to affect more significantlythe large angular scales. We find that by masking these regions, the analysis cannot solve thediscrepancy between the observations and the ΛCDM model in spite of a small improvementof their mutual consistency. The studies with both foreground masking and low-ℓ removedCMB maps show similar results than those of the full CMB map indicating that the maindiscrepancy between theory and observations is associated to the quadrupole anomaly andmay require more exhaustive analysis.
publishDate 2025
dc.date.none.fl_str_mv 2025-09
info:eu-repo/date/embargoEnd/2026-03-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/279082
Shao, Xiaoyun; Toscano, Facundo Nicolás; Garcia Lambas, Diego Rodolfo; Gonçalves, Rodrigo S.; Bengaly, Carlos A.P.; et al.; Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking; IOP Publishing; Journal of Cosmology and Astroparticle Physics; 2025; 09; 9-2025; 1-21
1475-7516
CONICET Digital
CONICET
url http://hdl.handle.net/11336/279082
identifier_str_mv Shao, Xiaoyun; Toscano, Facundo Nicolás; Garcia Lambas, Diego Rodolfo; Gonçalves, Rodrigo S.; Bengaly, Carlos A.P.; et al.; Revisiting the CMB homogeneity scale: low multipoles removal effect and extragalactic foreground masking; IOP Publishing; Journal of Cosmology and Astroparticle Physics; 2025; 09; 9-2025; 1-21
1475-7516
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1088/1475-7516/2025/09/002
info:eu-repo/semantics/altIdentifier/doi/10.1088/1475-7516/2025/09/002
dc.rights.none.fl_str_mv info:eu-repo/semantics/embargoedAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv embargoedAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.595271

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