Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids

Autores
Ruiz, Andrés Nicolás; Alfaro, Ignacio Germán; Garcia Lambas, Diego Rodolfo
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We compute the galaxy–galaxy correlation function of low-luminosity SDSS-DR7 galaxies (−20 < Mr − 5log10(h) < −18) inside cosmic voids identified in a volume-limited sample of galaxies at z = 0.085. To identify voids, we use bright galaxies with Mr − 5log10(h) < −20.0. We find that structure in voids as traced by faint galaxies is mildly non-linear as compared with the general population of galaxies with similar luminosities. This implies a redshift-space correlation function with a similar shape than the real-space correlation albeit a normalization factor. The redshift-space distortions of void galaxies allow to calculate pairwise velocity distributions which are consistent with an exponential model with a pairwise velocity dispersion of w ∼ 50–70 km s−1, significantly lower than the global value of w ∼ 500 km s−1. We also find that the internal structure of voids as traced by faint galaxies is independent of void environment, namely the correlation functions of galaxies residing in void-in-void or void-in-shell regions are identical within uncertainties. We have tested all our results with the semi-analytic catalogue MDPL2-SAG finding a suitable agreement with the observations in all topics studied.
Fil: Ruiz, Andrés 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: Alfaro, Ignacio Germán. 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
Materia
LARGE SCALE
STRUCTURE
UNIVERSE
COSMOLOGY
Nivel de accesibilidad
acceso abierto
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:11336/120053
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voidsRuiz, Andrés NicolásAlfaro, Ignacio GermánGarcia Lambas, Diego RodolfoLARGE SCALESTRUCTUREUNIVERSECOSMOLOGYhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We compute the galaxy–galaxy correlation function of low-luminosity SDSS-DR7 galaxies (−20 < Mr − 5log10(h) < −18) inside cosmic voids identified in a volume-limited sample of galaxies at z = 0.085. To identify voids, we use bright galaxies with Mr − 5log10(h) < −20.0. We find that structure in voids as traced by faint galaxies is mildly non-linear as compared with the general population of galaxies with similar luminosities. This implies a redshift-space correlation function with a similar shape than the real-space correlation albeit a normalization factor. The redshift-space distortions of void galaxies allow to calculate pairwise velocity distributions which are consistent with an exponential model with a pairwise velocity dispersion of w ∼ 50–70 km s−1, significantly lower than the global value of w ∼ 500 km s−1. We also find that the internal structure of voids as traced by faint galaxies is independent of void environment, namely the correlation functions of galaxies residing in void-in-void or void-in-shell regions are identical within uncertainties. We have tested all our results with the semi-analytic catalogue MDPL2-SAG finding a suitable agreement with the observations in all topics studied.Fil: Ruiz, Andrés 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: Alfaro, Ignacio Germán. 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; ArgentinaWiley Blackwell Publishing, Inc2019-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/120053Ruiz, Andrés Nicolás; Alfaro, Ignacio Germán; Garcia Lambas, Diego Rodolfo; Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 483; 3; 3-2019; 4070-40790035-87111365-2966CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/483/3/4070/5253611info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty3443info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:21:34Zoai:ri.conicet.gov.ar:11336/120053instacron: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:34982025-09-10 13:21:35.103CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids
title Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids
spellingShingle Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids
Ruiz, Andrés Nicolás
LARGE SCALE
STRUCTURE
UNIVERSE
COSMOLOGY
title_short Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids
title_full Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids
title_fullStr Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids
title_full_unstemmed Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids
title_sort Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids
dc.creator.none.fl_str_mv Ruiz, Andrés Nicolás
Alfaro, Ignacio Germán
Garcia Lambas, Diego Rodolfo
author Ruiz, Andrés Nicolás
author_facet Ruiz, Andrés Nicolás
Alfaro, Ignacio Germán
Garcia Lambas, Diego Rodolfo
author_role author
author2 Alfaro, Ignacio Germán
Garcia Lambas, Diego Rodolfo
author2_role author
author
dc.subject.none.fl_str_mv LARGE SCALE
STRUCTURE
UNIVERSE
COSMOLOGY
topic LARGE SCALE
STRUCTURE
UNIVERSE
COSMOLOGY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We compute the galaxy–galaxy correlation function of low-luminosity SDSS-DR7 galaxies (−20 < Mr − 5log10(h) < −18) inside cosmic voids identified in a volume-limited sample of galaxies at z = 0.085. To identify voids, we use bright galaxies with Mr − 5log10(h) < −20.0. We find that structure in voids as traced by faint galaxies is mildly non-linear as compared with the general population of galaxies with similar luminosities. This implies a redshift-space correlation function with a similar shape than the real-space correlation albeit a normalization factor. The redshift-space distortions of void galaxies allow to calculate pairwise velocity distributions which are consistent with an exponential model with a pairwise velocity dispersion of w ∼ 50–70 km s−1, significantly lower than the global value of w ∼ 500 km s−1. We also find that the internal structure of voids as traced by faint galaxies is independent of void environment, namely the correlation functions of galaxies residing in void-in-void or void-in-shell regions are identical within uncertainties. We have tested all our results with the semi-analytic catalogue MDPL2-SAG finding a suitable agreement with the observations in all topics studied.
Fil: Ruiz, Andrés 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: Alfaro, Ignacio Germán. 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
description We compute the galaxy–galaxy correlation function of low-luminosity SDSS-DR7 galaxies (−20 < Mr − 5log10(h) < −18) inside cosmic voids identified in a volume-limited sample of galaxies at z = 0.085. To identify voids, we use bright galaxies with Mr − 5log10(h) < −20.0. We find that structure in voids as traced by faint galaxies is mildly non-linear as compared with the general population of galaxies with similar luminosities. This implies a redshift-space correlation function with a similar shape than the real-space correlation albeit a normalization factor. The redshift-space distortions of void galaxies allow to calculate pairwise velocity distributions which are consistent with an exponential model with a pairwise velocity dispersion of w ∼ 50–70 km s−1, significantly lower than the global value of w ∼ 500 km s−1. We also find that the internal structure of voids as traced by faint galaxies is independent of void environment, namely the correlation functions of galaxies residing in void-in-void or void-in-shell regions are identical within uncertainties. We have tested all our results with the semi-analytic catalogue MDPL2-SAG finding a suitable agreement with the observations in all topics studied.
publishDate 2019
dc.date.none.fl_str_mv 2019-03
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/11336/120053
Ruiz, Andrés Nicolás; Alfaro, Ignacio Germán; Garcia Lambas, Diego Rodolfo; Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 483; 3; 3-2019; 4070-4079
0035-8711
1365-2966
CONICET Digital
CONICET
url http://hdl.handle.net/11336/120053
identifier_str_mv Ruiz, Andrés Nicolás; Alfaro, Ignacio Germán; Garcia Lambas, Diego Rodolfo; Structure and dynamics in low-density regions: galaxy–galaxy correlations inside cosmic voids; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 483; 3; 3-2019; 4070-4079
0035-8711
1365-2966
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://academic.oup.com/mnras/article/483/3/4070/5253611
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty3443
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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 12.48226

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