New age-metallicity diagnostic diagram for the Washington photometric system

Autores
Piatti, Andres Eduardo; Perren, Gabriel Ignacio
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The age calibration of the Washington δT1 index is mainly used to estimate ages of star clusters older than 1 Gyr and no age-metallicity degeneracy effect is considered. We have profusely exploited synthetic T1 versus C - T1 colour magnitude diagrams to explore the intrinsic behaviour of the δT1 index. The analysis shows that δT1 varies with age and metal content as well. In general, the dependence on age weakens for ages greater than ~6 Gyr, and is even less sensitive to age as the metallicity decreases. For ages younger than ~5 Gyr, δT1 shows a strong correlation with both age and metallicity. The δC index - defined as δT1 for the C passband - is also a combined measurement of age and metallicity. We introduce a new age-metallicity diagnostic diagram, δT1 versus δC - δT1, which can unambiguously provide age and metallicity estimates, simultaneously. The new procedure can be used to derive ages from 1 up to 13 Gyr and metallicities [Fe/H] from -2.0 up to +0.5 dex, and is independent of the cluster reddening and distance modulus. It solves the constraints found in the δT1 index and surpasses the performance of the standard giant branch metallicity method. All these features make the diagnostic diagram a powerful tool for estimating accurate ages as well as metallicities.
Fil: Piatti, Andres Eduardo. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Perren, Gabriel Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Materia
TECHNIQUES: PHOTOMETRIC
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:11336/61531
Acceder
id CONICETDig_244ac644337c9779c0073b50e3832712
oai_identifier_str oai:ri.conicet.gov.ar:11336/61531
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling New age-metallicity diagnostic diagram for the Washington photometric systemPiatti, Andres EduardoPerren, Gabriel IgnacioTECHNIQUES: PHOTOMETRICThe age calibration of the Washington δT1 index is mainly used to estimate ages of star clusters older than 1 Gyr and no age-metallicity degeneracy effect is considered. We have profusely exploited synthetic T1 versus C - T1 colour magnitude diagrams to explore the intrinsic behaviour of the δT1 index. The analysis shows that δT1 varies with age and metal content as well. In general, the dependence on age weakens for ages greater than ~6 Gyr, and is even less sensitive to age as the metallicity decreases. For ages younger than ~5 Gyr, δT1 shows a strong correlation with both age and metallicity. The δC index - defined as δT1 for the C passband - is also a combined measurement of age and metallicity. We introduce a new age-metallicity diagnostic diagram, δT1 versus δC - δT1, which can unambiguously provide age and metallicity estimates, simultaneously. The new procedure can be used to derive ages from 1 up to 13 Gyr and metallicities [Fe/H] from -2.0 up to +0.5 dex, and is independent of the cluster reddening and distance modulus. It solves the constraints found in the δT1 index and surpasses the performance of the standard giant branch metallicity method. All these features make the diagnostic diagram a powerful tool for estimating accurate ages as well as metallicities.Fil: Piatti, Andres Eduardo. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Perren, Gabriel Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaWiley Blackwell Publishing, Inc2015-04info: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/11336/61531Piatti, Andres Eduardo; Perren, Gabriel Ignacio; New age-metallicity diagnostic diagram for the Washington photometric system; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 450; 4; 4-2015; 3771-37770035-87111365-2966CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/450/4/3771/1748691info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stv861info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:39:27Zoai:ri.conicet.gov.ar:11336/61531instacron: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 09:39:27.389CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New age-metallicity diagnostic diagram for the Washington photometric system
title New age-metallicity diagnostic diagram for the Washington photometric system
spellingShingle New age-metallicity diagnostic diagram for the Washington photometric system
Piatti, Andres Eduardo
TECHNIQUES: PHOTOMETRIC
title_short New age-metallicity diagnostic diagram for the Washington photometric system
title_full New age-metallicity diagnostic diagram for the Washington photometric system
title_fullStr New age-metallicity diagnostic diagram for the Washington photometric system
title_full_unstemmed New age-metallicity diagnostic diagram for the Washington photometric system
title_sort New age-metallicity diagnostic diagram for the Washington photometric system
dc.creator.none.fl_str_mv Piatti, Andres Eduardo
Perren, Gabriel Ignacio
author Piatti, Andres Eduardo
author_facet Piatti, Andres Eduardo
Perren, Gabriel Ignacio
author_role author
author2 Perren, Gabriel Ignacio
author2_role author
dc.subject.none.fl_str_mv TECHNIQUES: PHOTOMETRIC
topic TECHNIQUES: PHOTOMETRIC
dc.description.none.fl_txt_mv The age calibration of the Washington δT1 index is mainly used to estimate ages of star clusters older than 1 Gyr and no age-metallicity degeneracy effect is considered. We have profusely exploited synthetic T1 versus C - T1 colour magnitude diagrams to explore the intrinsic behaviour of the δT1 index. The analysis shows that δT1 varies with age and metal content as well. In general, the dependence on age weakens for ages greater than ~6 Gyr, and is even less sensitive to age as the metallicity decreases. For ages younger than ~5 Gyr, δT1 shows a strong correlation with both age and metallicity. The δC index - defined as δT1 for the C passband - is also a combined measurement of age and metallicity. We introduce a new age-metallicity diagnostic diagram, δT1 versus δC - δT1, which can unambiguously provide age and metallicity estimates, simultaneously. The new procedure can be used to derive ages from 1 up to 13 Gyr and metallicities [Fe/H] from -2.0 up to +0.5 dex, and is independent of the cluster reddening and distance modulus. It solves the constraints found in the δT1 index and surpasses the performance of the standard giant branch metallicity method. All these features make the diagnostic diagram a powerful tool for estimating accurate ages as well as metallicities.
Fil: Piatti, Andres Eduardo. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Perren, Gabriel Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
description The age calibration of the Washington δT1 index is mainly used to estimate ages of star clusters older than 1 Gyr and no age-metallicity degeneracy effect is considered. We have profusely exploited synthetic T1 versus C - T1 colour magnitude diagrams to explore the intrinsic behaviour of the δT1 index. The analysis shows that δT1 varies with age and metal content as well. In general, the dependence on age weakens for ages greater than ~6 Gyr, and is even less sensitive to age as the metallicity decreases. For ages younger than ~5 Gyr, δT1 shows a strong correlation with both age and metallicity. The δC index - defined as δT1 for the C passband - is also a combined measurement of age and metallicity. We introduce a new age-metallicity diagnostic diagram, δT1 versus δC - δT1, which can unambiguously provide age and metallicity estimates, simultaneously. The new procedure can be used to derive ages from 1 up to 13 Gyr and metallicities [Fe/H] from -2.0 up to +0.5 dex, and is independent of the cluster reddening and distance modulus. It solves the constraints found in the δT1 index and surpasses the performance of the standard giant branch metallicity method. All these features make the diagnostic diagram a powerful tool for estimating accurate ages as well as metallicities.
publishDate 2015
dc.date.none.fl_str_mv 2015-04
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/11336/61531
Piatti, Andres Eduardo; Perren, Gabriel Ignacio; New age-metallicity diagnostic diagram for the Washington photometric system; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 450; 4; 4-2015; 3771-3777
0035-8711
1365-2966
CONICET Digital
CONICET
url http://hdl.handle.net/11336/61531
identifier_str_mv Piatti, Andres Eduardo; Perren, Gabriel Ignacio; New age-metallicity diagnostic diagram for the Washington photometric system; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 450; 4; 4-2015; 3771-3777
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/450/4/3771/1748691
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stv861
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
_version_ 1844613248197853184
score 13.070432

Publicaciones similares