Close galaxy pairs with accurate photometric redshifts
- Autores
- Rodriguez, Facundo; Gonzalez, Elizabeth Johana; O'Mill, Ana Laura; Gaztañaga, Enrique; Fosalba, Pablo; Lambas, Diego García; Mezcua, Mar; Siudek, Malgorzata
- Año de publicación
- 2020
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Studies of galaxy pairs can provide valuable information to jointly understand the formation and evolution of galaxies and galaxy groups. Consequently, taking the new high-precision photo-z surveys into account, it is important to have reliable and tested methods that allow us to properly identify these systems and estimate their total masses and other properties.Aims. In view of the forthcoming Physics of the Accelerating Universe Survey (PAUS), we propose and evaluate the performance of an identification algorithm of projected close isolated galaxy pairs. We expect that the photometrically selected systems can adequately reproduce the observational properties and the inferred lensing mass?luminosity relation of a pair of truly bound galaxies that are hosted by the same dark matter halo.Methods. We developed an identification algorithm that considers the projected distance between the galaxies, the projected velocity difference, and an isolation criterion in order to restrict the sample to isolated systems. We applied our identification algorithm using a mock galaxy catalog that mimics the features of PAUS. To evaluate the feasibility of our pair finder, we compared the identified photometric samples with a test sample that considers that both members are included in the same halo. Taking advantage of the lensing properties provided by the mock catalog, we also applied a weak-lensing analysis to determine the mass of the selected systems.Results. Photometrically selected samples tend to show high purity values, but tend to misidentify truly bounded pairs as the photometric redshift errors increase. Nevertheless, overall properties such as the luminosity and mass distributions are successfully reproduced. We also accurately reproduce the lensing mass-luminosity relation as expected for galaxy pairs located in the same halo.
Fil: Rodriguez, Facundo. 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. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Gonzalez, Elizabeth Johana. 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: O'Mill, Ana Laura. 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: Gaztañaga, Enrique. Institut d’Estudis Espacials de Catalunya; España. Institute of Space Sciences; España
Fil: Fosalba, Pablo. Institut d’Estudis Espacials de Catalunya; España. Institute of Space Sciences; España
Fil: Lambas, Diego García. 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. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Mezcua, Mar. Institute of Space Sciences; España. Institut d’Estudis Espacials de Catalunya; España
Fil: Siudek, Malgorzata. The Barcelona Institute of Science and Technology; España. National Centre for Nuclear Research; Polonia - Materia
-
GALAXIES: GROUPS: GENERAL
GALAXIES: HALOS
GRAVITATIONAL LENSING: WEAK - 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:11336/140908
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/140908 |
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Close galaxy pairs with accurate photometric redshiftsRodriguez, FacundoGonzalez, Elizabeth JohanaO'Mill, Ana LauraGaztañaga, EnriqueFosalba, PabloLambas, Diego GarcíaMezcua, MarSiudek, MalgorzataGALAXIES: GROUPS: GENERALGALAXIES: HALOSGRAVITATIONAL LENSING: WEAKhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Studies of galaxy pairs can provide valuable information to jointly understand the formation and evolution of galaxies and galaxy groups. Consequently, taking the new high-precision photo-z surveys into account, it is important to have reliable and tested methods that allow us to properly identify these systems and estimate their total masses and other properties.Aims. In view of the forthcoming Physics of the Accelerating Universe Survey (PAUS), we propose and evaluate the performance of an identification algorithm of projected close isolated galaxy pairs. We expect that the photometrically selected systems can adequately reproduce the observational properties and the inferred lensing mass?luminosity relation of a pair of truly bound galaxies that are hosted by the same dark matter halo.Methods. We developed an identification algorithm that considers the projected distance between the galaxies, the projected velocity difference, and an isolation criterion in order to restrict the sample to isolated systems. We applied our identification algorithm using a mock galaxy catalog that mimics the features of PAUS. To evaluate the feasibility of our pair finder, we compared the identified photometric samples with a test sample that considers that both members are included in the same halo. Taking advantage of the lensing properties provided by the mock catalog, we also applied a weak-lensing analysis to determine the mass of the selected systems.Results. Photometrically selected samples tend to show high purity values, but tend to misidentify truly bounded pairs as the photometric redshift errors increase. Nevertheless, overall properties such as the luminosity and mass distributions are successfully reproduced. We also accurately reproduce the lensing mass-luminosity relation as expected for galaxy pairs located in the same halo.Fil: Rodriguez, Facundo. 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. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Gonzalez, Elizabeth Johana. 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: O'Mill, Ana Laura. 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: Gaztañaga, Enrique. Institut d’Estudis Espacials de Catalunya; España. Institute of Space Sciences; EspañaFil: Fosalba, Pablo. Institut d’Estudis Espacials de Catalunya; España. Institute of Space Sciences; EspañaFil: Lambas, Diego García. 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. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Mezcua, Mar. Institute of Space Sciences; España. Institut d’Estudis Espacials de Catalunya; EspañaFil: Siudek, Malgorzata. The Barcelona Institute of Science and Technology; España. National Centre for Nuclear Research; PoloniaEDP Sciences2020-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/140908Rodriguez, Facundo; Gonzalez, Elizabeth Johana; O'Mill, Ana Laura; Gaztañaga, Enrique; Fosalba, Pablo; et al.; Close galaxy pairs with accurate photometric redshifts; EDP Sciences; Astronomy and Astrophysics; 634; 2-2020; 1-100004-63611432-0746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/201937215info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201937215info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:59Zoai:ri.conicet.gov.ar:11336/140908instacron: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 09:35:59.335CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Close galaxy pairs with accurate photometric redshifts |
title |
Close galaxy pairs with accurate photometric redshifts |
spellingShingle |
Close galaxy pairs with accurate photometric redshifts Rodriguez, Facundo GALAXIES: GROUPS: GENERAL GALAXIES: HALOS GRAVITATIONAL LENSING: WEAK |
title_short |
Close galaxy pairs with accurate photometric redshifts |
title_full |
Close galaxy pairs with accurate photometric redshifts |
title_fullStr |
Close galaxy pairs with accurate photometric redshifts |
title_full_unstemmed |
Close galaxy pairs with accurate photometric redshifts |
title_sort |
Close galaxy pairs with accurate photometric redshifts |
dc.creator.none.fl_str_mv |
Rodriguez, Facundo Gonzalez, Elizabeth Johana O'Mill, Ana Laura Gaztañaga, Enrique Fosalba, Pablo Lambas, Diego García Mezcua, Mar Siudek, Malgorzata |
author |
Rodriguez, Facundo |
author_facet |
Rodriguez, Facundo Gonzalez, Elizabeth Johana O'Mill, Ana Laura Gaztañaga, Enrique Fosalba, Pablo Lambas, Diego García Mezcua, Mar Siudek, Malgorzata |
author_role |
author |
author2 |
Gonzalez, Elizabeth Johana O'Mill, Ana Laura Gaztañaga, Enrique Fosalba, Pablo Lambas, Diego García Mezcua, Mar Siudek, Malgorzata |
author2_role |
author author author author author author author |
dc.subject.none.fl_str_mv |
GALAXIES: GROUPS: GENERAL GALAXIES: HALOS GRAVITATIONAL LENSING: WEAK |
topic |
GALAXIES: GROUPS: GENERAL GALAXIES: HALOS GRAVITATIONAL LENSING: WEAK |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Studies of galaxy pairs can provide valuable information to jointly understand the formation and evolution of galaxies and galaxy groups. Consequently, taking the new high-precision photo-z surveys into account, it is important to have reliable and tested methods that allow us to properly identify these systems and estimate their total masses and other properties.Aims. In view of the forthcoming Physics of the Accelerating Universe Survey (PAUS), we propose and evaluate the performance of an identification algorithm of projected close isolated galaxy pairs. We expect that the photometrically selected systems can adequately reproduce the observational properties and the inferred lensing mass?luminosity relation of a pair of truly bound galaxies that are hosted by the same dark matter halo.Methods. We developed an identification algorithm that considers the projected distance between the galaxies, the projected velocity difference, and an isolation criterion in order to restrict the sample to isolated systems. We applied our identification algorithm using a mock galaxy catalog that mimics the features of PAUS. To evaluate the feasibility of our pair finder, we compared the identified photometric samples with a test sample that considers that both members are included in the same halo. Taking advantage of the lensing properties provided by the mock catalog, we also applied a weak-lensing analysis to determine the mass of the selected systems.Results. Photometrically selected samples tend to show high purity values, but tend to misidentify truly bounded pairs as the photometric redshift errors increase. Nevertheless, overall properties such as the luminosity and mass distributions are successfully reproduced. We also accurately reproduce the lensing mass-luminosity relation as expected for galaxy pairs located in the same halo. Fil: Rodriguez, Facundo. 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. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina Fil: Gonzalez, Elizabeth Johana. 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: O'Mill, Ana Laura. 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: Gaztañaga, Enrique. Institut d’Estudis Espacials de Catalunya; España. Institute of Space Sciences; España Fil: Fosalba, Pablo. Institut d’Estudis Espacials de Catalunya; España. Institute of Space Sciences; España Fil: Lambas, Diego García. 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. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina Fil: Mezcua, Mar. Institute of Space Sciences; España. Institut d’Estudis Espacials de Catalunya; España Fil: Siudek, Malgorzata. The Barcelona Institute of Science and Technology; España. National Centre for Nuclear Research; Polonia |
description |
Studies of galaxy pairs can provide valuable information to jointly understand the formation and evolution of galaxies and galaxy groups. Consequently, taking the new high-precision photo-z surveys into account, it is important to have reliable and tested methods that allow us to properly identify these systems and estimate their total masses and other properties.Aims. In view of the forthcoming Physics of the Accelerating Universe Survey (PAUS), we propose and evaluate the performance of an identification algorithm of projected close isolated galaxy pairs. We expect that the photometrically selected systems can adequately reproduce the observational properties and the inferred lensing mass?luminosity relation of a pair of truly bound galaxies that are hosted by the same dark matter halo.Methods. We developed an identification algorithm that considers the projected distance between the galaxies, the projected velocity difference, and an isolation criterion in order to restrict the sample to isolated systems. We applied our identification algorithm using a mock galaxy catalog that mimics the features of PAUS. To evaluate the feasibility of our pair finder, we compared the identified photometric samples with a test sample that considers that both members are included in the same halo. Taking advantage of the lensing properties provided by the mock catalog, we also applied a weak-lensing analysis to determine the mass of the selected systems.Results. Photometrically selected samples tend to show high purity values, but tend to misidentify truly bounded pairs as the photometric redshift errors increase. Nevertheless, overall properties such as the luminosity and mass distributions are successfully reproduced. We also accurately reproduce the lensing mass-luminosity relation as expected for galaxy pairs located in the same halo. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-02 |
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/11336/140908 Rodriguez, Facundo; Gonzalez, Elizabeth Johana; O'Mill, Ana Laura; Gaztañaga, Enrique; Fosalba, Pablo; et al.; Close galaxy pairs with accurate photometric redshifts; EDP Sciences; Astronomy and Astrophysics; 634; 2-2020; 1-10 0004-6361 1432-0746 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/140908 |
identifier_str_mv |
Rodriguez, Facundo; Gonzalez, Elizabeth Johana; O'Mill, Ana Laura; Gaztañaga, Enrique; Fosalba, Pablo; et al.; Close galaxy pairs with accurate photometric redshifts; EDP Sciences; Astronomy and Astrophysics; 634; 2-2020; 1-10 0004-6361 1432-0746 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://www.aanda.org/10.1051/0004-6361/201937215 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201937215 |
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 |
EDP Sciences |
publisher.none.fl_str_mv |
EDP Sciences |
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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1844613125527044096 |
score |
13.070432 |