Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)

Autores
Forte, Juan Carlos; Faifer, Favio Raúl; Vega, Ema Irene; Bassino, Lilia Patricia; Smith Castelli, Analía Viviana; Cellone, Sergio Aldo; Geisler, Douglas
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present Gemini griz' photometry for 521 globular cluster (GC) candidates in a 5.5 × 5.5 arcmin2 field centred 3.8 arcmin to the south and 0.9arcmin to the west of the centre of the giant elliptical galaxy NGC 4486. All these objects have previously published (C - T1) photometry. We also present new (C - T1) photometry for 338 globulars, within 1.7 arcmin in galactocentric radius, which have (g - z) colours in the photometric system adopted by the Virgo Cluster Survey of the Advanced Camera for Surveys of the Hubble Space Telescope (HST). These photometric data are used to define a self-consistent multicolour grid (avoiding polynomial fits) and preliminarily calibrated in terms of two chemical abundance scales. The resulting multicolour colour-chemical abundance relations are used to test GC chemical abundance distributions. This is accomplished by modelling the 10 GC colour histograms that can be defined in terms of the Cgriz' bands. Our results suggest that the best fit to the GC observed colour histograms is consistent with a genuinely bimodal chemical abundance distribution NGC(Z). On the other side, each ('blue' and 'red') GC subpopulation follows a distinct colour-colour relation.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
Galaxies:Haloes
Galaxies:Star clusters:General
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/85479

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/85479
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)Forte, Juan CarlosFaifer, Favio RaúlVega, Ema IreneBassino, Lilia PatriciaSmith Castelli, Analía VivianaCellone, Sergio AldoGeisler, DouglasCiencias AstronómicasGalaxies:HaloesGalaxies:Star clusters:GeneralWe present Gemini griz' photometry for 521 globular cluster (GC) candidates in a 5.5 × 5.5 arcmin<sup>2</sup> field centred 3.8 arcmin to the south and 0.9arcmin to the west of the centre of the giant elliptical galaxy NGC 4486. All these objects have previously published (C - T<sub>1</sub>) photometry. We also present new (C - T<sub>1</sub>) photometry for 338 globulars, within 1.7 arcmin in galactocentric radius, which have (g - z) colours in the photometric system adopted by the Virgo Cluster Survey of the Advanced Camera for Surveys of the Hubble Space Telescope (HST). These photometric data are used to define a self-consistent multicolour grid (avoiding polynomial fits) and preliminarily calibrated in terms of two chemical abundance scales. The resulting multicolour colour-chemical abundance relations are used to test GC chemical abundance distributions. This is accomplished by modelling the 10 GC colour histograms that can be defined in terms of the Cgriz' bands. Our results suggest that the best fit to the GC observed colour histograms is consistent with a genuinely bimodal chemical abundance distribution N<sub>GC</sub>(Z). On the other side, each ('blue' and 'red') GC subpopulation follows a distinct colour-colour relation.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1405-1416http://sedici.unlp.edu.ar/handle/10915/85479enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stt263info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:30Zoai:sedici.unlp.edu.ar:10915/85479Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:31.038SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)
title Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)
spellingShingle Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)
Forte, Juan Carlos
Ciencias Astronómicas
Galaxies:Haloes
Galaxies:Star clusters:General
title_short Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)
title_full Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)
title_fullStr Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)
title_full_unstemmed Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)
title_sort Multicolour-metallicity relations from globular clusters in NGC 4486 (M87)
dc.creator.none.fl_str_mv Forte, Juan Carlos
Faifer, Favio Raúl
Vega, Ema Irene
Bassino, Lilia Patricia
Smith Castelli, Analía Viviana
Cellone, Sergio Aldo
Geisler, Douglas
author Forte, Juan Carlos
author_facet Forte, Juan Carlos
Faifer, Favio Raúl
Vega, Ema Irene
Bassino, Lilia Patricia
Smith Castelli, Analía Viviana
Cellone, Sergio Aldo
Geisler, Douglas
author_role author
author2 Faifer, Favio Raúl
Vega, Ema Irene
Bassino, Lilia Patricia
Smith Castelli, Analía Viviana
Cellone, Sergio Aldo
Geisler, Douglas
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Galaxies:Haloes
Galaxies:Star clusters:General
topic Ciencias Astronómicas
Galaxies:Haloes
Galaxies:Star clusters:General
dc.description.none.fl_txt_mv We present Gemini griz' photometry for 521 globular cluster (GC) candidates in a 5.5 × 5.5 arcmin<sup>2</sup> field centred 3.8 arcmin to the south and 0.9arcmin to the west of the centre of the giant elliptical galaxy NGC 4486. All these objects have previously published (C - T<sub>1</sub>) photometry. We also present new (C - T<sub>1</sub>) photometry for 338 globulars, within 1.7 arcmin in galactocentric radius, which have (g - z) colours in the photometric system adopted by the Virgo Cluster Survey of the Advanced Camera for Surveys of the Hubble Space Telescope (HST). These photometric data are used to define a self-consistent multicolour grid (avoiding polynomial fits) and preliminarily calibrated in terms of two chemical abundance scales. The resulting multicolour colour-chemical abundance relations are used to test GC chemical abundance distributions. This is accomplished by modelling the 10 GC colour histograms that can be defined in terms of the Cgriz' bands. Our results suggest that the best fit to the GC observed colour histograms is consistent with a genuinely bimodal chemical abundance distribution N<sub>GC</sub>(Z). On the other side, each ('blue' and 'red') GC subpopulation follows a distinct colour-colour relation.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description We present Gemini griz' photometry for 521 globular cluster (GC) candidates in a 5.5 × 5.5 arcmin<sup>2</sup> field centred 3.8 arcmin to the south and 0.9arcmin to the west of the centre of the giant elliptical galaxy NGC 4486. All these objects have previously published (C - T<sub>1</sub>) photometry. We also present new (C - T<sub>1</sub>) photometry for 338 globulars, within 1.7 arcmin in galactocentric radius, which have (g - z) colours in the photometric system adopted by the Virgo Cluster Survey of the Advanced Camera for Surveys of the Hubble Space Telescope (HST). These photometric data are used to define a self-consistent multicolour grid (avoiding polynomial fits) and preliminarily calibrated in terms of two chemical abundance scales. The resulting multicolour colour-chemical abundance relations are used to test GC chemical abundance distributions. This is accomplished by modelling the 10 GC colour histograms that can be defined in terms of the Cgriz' bands. Our results suggest that the best fit to the GC observed colour histograms is consistent with a genuinely bimodal chemical abundance distribution N<sub>GC</sub>(Z). On the other side, each ('blue' and 'red') GC subpopulation follows a distinct colour-colour relation.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/85479
url http://sedici.unlp.edu.ar/handle/10915/85479
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0035-8711
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stt263
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
1405-1416
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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