Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues
- Autores
- Taverna, Maria Antonela; Díaz Giménez, Eugenia; Zandivarez, Arnaldo Ariel; Mamon, G. A.
- Año de publicación
- 2022
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Many catalogues of isolated compact groups of galaxies (CGs) have been extracted using Hickson's criteria to identify isolated, dense systems of galaxies, with at least three or four galaxies concordant in magnitude and redshift. But is not clear to what extent the catalogues of CGs are complete and reliable, relative to 3D truly isolated, dense groups. Using five different semi-analytical models of galaxy formation (SAMs), we identify isolated dense groups in 3D real space, containing at least three galaxies. We then build mock redshift space galaxy catalogues and run a Hickson-like CG finder. We find that the Hickson-like algorithm in redshift space is poor at recovering 3D CGs of at least three galaxies, with a purity of ∼ 10 per cent and a completeness of ∼ 22 per cent. Among the ∼ 90 per cent of spurious systems, typically 60 per cent are dense structures that failed the 3D isolation criteria, while the remaining 40 per cent are chance alignments of galaxies along the line of sight, nearly all of which are within regular groups, with some variation with the SAM used for the analysis. In other words, while only 10 per cent of CGs are isolated dense groups, as intended, half are dense structures embedded within larger groups, and one-third are chance alignments within larger groups. The low completeness of the extracted CG sample is mainly due to the flux limits of the selection criteria. Our results suggest that a new observational algorithm to identify compact groups in redshift space is required to obtain dense isolated galaxy systems.
Fil: Taverna, Maria Antonela. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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: Díaz Giménez, Eugenia. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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: Zandivarez, Arnaldo Ariel. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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: Mamon, G. A.. Sorbonne University; Francia - Materia
-
CATALOGUES
GALAXIES: GROUPS: GENERAL
METHODS: DATA ANALYSIS
METHODS: STATISTICAL - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/202778
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Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like cataloguesTaverna, Maria AntonelaDíaz Giménez, EugeniaZandivarez, Arnaldo ArielMamon, G. A.CATALOGUESGALAXIES: GROUPS: GENERALMETHODS: DATA ANALYSISMETHODS: STATISTICALhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Many catalogues of isolated compact groups of galaxies (CGs) have been extracted using Hickson's criteria to identify isolated, dense systems of galaxies, with at least three or four galaxies concordant in magnitude and redshift. But is not clear to what extent the catalogues of CGs are complete and reliable, relative to 3D truly isolated, dense groups. Using five different semi-analytical models of galaxy formation (SAMs), we identify isolated dense groups in 3D real space, containing at least three galaxies. We then build mock redshift space galaxy catalogues and run a Hickson-like CG finder. We find that the Hickson-like algorithm in redshift space is poor at recovering 3D CGs of at least three galaxies, with a purity of ∼ 10 per cent and a completeness of ∼ 22 per cent. Among the ∼ 90 per cent of spurious systems, typically 60 per cent are dense structures that failed the 3D isolation criteria, while the remaining 40 per cent are chance alignments of galaxies along the line of sight, nearly all of which are within regular groups, with some variation with the SAM used for the analysis. In other words, while only 10 per cent of CGs are isolated dense groups, as intended, half are dense structures embedded within larger groups, and one-third are chance alignments within larger groups. The low completeness of the extracted CG sample is mainly due to the flux limits of the selection criteria. Our results suggest that a new observational algorithm to identify compact groups in redshift space is required to obtain dense isolated galaxy systems.Fil: Taverna, Maria Antonela. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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: Díaz Giménez, Eugenia. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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: Zandivarez, Arnaldo Ariel. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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: Mamon, G. A.. Sorbonne University; FranciaOxford University Press2022-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/202778Taverna, Maria Antonela; Díaz Giménez, Eugenia; Zandivarez, Arnaldo Ariel; Mamon, G. A.; Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 511; 4; 1-2022; 4741-47520035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stac200/6516969info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stac200info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/2201.08358info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:45:20Zoai:ri.conicet.gov.ar:11336/202778instacron: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:34982025-09-29 09:45:20.651CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues |
title |
Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues |
spellingShingle |
Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues Taverna, Maria Antonela CATALOGUES GALAXIES: GROUPS: GENERAL METHODS: DATA ANALYSIS METHODS: STATISTICAL |
title_short |
Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues |
title_full |
Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues |
title_fullStr |
Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues |
title_full_unstemmed |
Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues |
title_sort |
Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues |
dc.creator.none.fl_str_mv |
Taverna, Maria Antonela Díaz Giménez, Eugenia Zandivarez, Arnaldo Ariel Mamon, G. A. |
author |
Taverna, Maria Antonela |
author_facet |
Taverna, Maria Antonela Díaz Giménez, Eugenia Zandivarez, Arnaldo Ariel Mamon, G. A. |
author_role |
author |
author2 |
Díaz Giménez, Eugenia Zandivarez, Arnaldo Ariel Mamon, G. A. |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
CATALOGUES GALAXIES: GROUPS: GENERAL METHODS: DATA ANALYSIS METHODS: STATISTICAL |
topic |
CATALOGUES GALAXIES: GROUPS: GENERAL METHODS: DATA ANALYSIS METHODS: STATISTICAL |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Many catalogues of isolated compact groups of galaxies (CGs) have been extracted using Hickson's criteria to identify isolated, dense systems of galaxies, with at least three or four galaxies concordant in magnitude and redshift. But is not clear to what extent the catalogues of CGs are complete and reliable, relative to 3D truly isolated, dense groups. Using five different semi-analytical models of galaxy formation (SAMs), we identify isolated dense groups in 3D real space, containing at least three galaxies. We then build mock redshift space galaxy catalogues and run a Hickson-like CG finder. We find that the Hickson-like algorithm in redshift space is poor at recovering 3D CGs of at least three galaxies, with a purity of ∼ 10 per cent and a completeness of ∼ 22 per cent. Among the ∼ 90 per cent of spurious systems, typically 60 per cent are dense structures that failed the 3D isolation criteria, while the remaining 40 per cent are chance alignments of galaxies along the line of sight, nearly all of which are within regular groups, with some variation with the SAM used for the analysis. In other words, while only 10 per cent of CGs are isolated dense groups, as intended, half are dense structures embedded within larger groups, and one-third are chance alignments within larger groups. The low completeness of the extracted CG sample is mainly due to the flux limits of the selection criteria. Our results suggest that a new observational algorithm to identify compact groups in redshift space is required to obtain dense isolated galaxy systems. Fil: Taverna, Maria Antonela. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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: Díaz Giménez, Eugenia. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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: Zandivarez, Arnaldo Ariel. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. 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: Mamon, G. A.. Sorbonne University; Francia |
description |
Many catalogues of isolated compact groups of galaxies (CGs) have been extracted using Hickson's criteria to identify isolated, dense systems of galaxies, with at least three or four galaxies concordant in magnitude and redshift. But is not clear to what extent the catalogues of CGs are complete and reliable, relative to 3D truly isolated, dense groups. Using five different semi-analytical models of galaxy formation (SAMs), we identify isolated dense groups in 3D real space, containing at least three galaxies. We then build mock redshift space galaxy catalogues and run a Hickson-like CG finder. We find that the Hickson-like algorithm in redshift space is poor at recovering 3D CGs of at least three galaxies, with a purity of ∼ 10 per cent and a completeness of ∼ 22 per cent. Among the ∼ 90 per cent of spurious systems, typically 60 per cent are dense structures that failed the 3D isolation criteria, while the remaining 40 per cent are chance alignments of galaxies along the line of sight, nearly all of which are within regular groups, with some variation with the SAM used for the analysis. In other words, while only 10 per cent of CGs are isolated dense groups, as intended, half are dense structures embedded within larger groups, and one-third are chance alignments within larger groups. The low completeness of the extracted CG sample is mainly due to the flux limits of the selection criteria. Our results suggest that a new observational algorithm to identify compact groups in redshift space is required to obtain dense isolated galaxy systems. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01 |
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/11336/202778 Taverna, Maria Antonela; Díaz Giménez, Eugenia; Zandivarez, Arnaldo Ariel; Mamon, G. A.; Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 511; 4; 1-2022; 4741-4752 0035-8711 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/202778 |
identifier_str_mv |
Taverna, Maria Antonela; Díaz Giménez, Eugenia; Zandivarez, Arnaldo Ariel; Mamon, G. A.; Compact groups from semi-analytical models of galaxy formation-III: Purity and completeness of Hickson-like catalogues; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 511; 4; 1-2022; 4741-4752 0035-8711 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/advance-article/doi/10.1093/mnras/stac200/6516969 info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stac200 info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/2201.08358 |
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 |
dc.publisher.none.fl_str_mv |
Oxford University Press |
publisher.none.fl_str_mv |
Oxford University Press |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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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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13.070432 |