Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649

Autores
Pierce, Michael; Bridges, Terry; Forbes, Duncan A.; Proctor, Robert; Beasley, Michael A.; Gebhardt, Karl; Faifer, Favio Raúl; Forte, Juan Carlos; Zepf, Stephen E.; Sharpies, Ray; Hanes, David A.
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
NGC 4649 (M60) is one of a handful of giant Virgo ellipticals. We have obtained Gemini/GMOS (Gemini North Multi-Object Spectrograph) spectra for 38 globular clusters (GCs) associated with this galaxy. Applying the multi-index χ2 minimization technique of Proctor and Sansom with the single stellar population models of Thomas, Maraston and Korn, we derive ages, metallicities and α-element abundance ratios. We find several young (2-3 Gyr old) supersolar metallicity GCs, while the majority are old (>10 Gyr), spanning a range of metallicities from solar to [Z/H] = -2. At least two of these young GCs are at large projected radii of 17-20 kpc. The galaxy itself shows no obvious signs of a recent starburst, interaction or merger. A trend of decreasing α-element ratio with increasing metallicity is found.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
Galaxies: individual: NGC 4649
Galaxies: star clusters
Globular 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:10915/84358
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/84358
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649Pierce, MichaelBridges, TerryForbes, Duncan A.Proctor, RobertBeasley, Michael A.Gebhardt, KarlFaifer, Favio RaúlForte, Juan CarlosZepf, Stephen E.Sharpies, RayHanes, David A.Ciencias AstronómicasGalaxies: individual: NGC 4649Galaxies: star clustersGlobular clusters: generalNGC 4649 (M60) is one of a handful of giant Virgo ellipticals. We have obtained Gemini/GMOS (Gemini North Multi-Object Spectrograph) spectra for 38 globular clusters (GCs) associated with this galaxy. Applying the multi-index χ<SUP>2</SUP> minimization technique of Proctor and Sansom with the single stellar population models of Thomas, Maraston and Korn, we derive ages, metallicities and α-element abundance ratios. We find several young (2-3 Gyr old) supersolar metallicity GCs, while the majority are old (>10 Gyr), spanning a range of metallicities from solar to [Z/H] = -2. At least two of these young GCs are at large projected radii of 17-20 kpc. The galaxy itself shows no obvious signs of a recent starburst, interaction or merger. A trend of decreasing α-element ratio with increasing metallicity is found.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf325-334http://sedici.unlp.edu.ar/handle/10915/84358enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2006.10097.xinfo: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:UNLP2025-10-22T16:57:02Zoai:sedici.unlp.edu.ar:10915/84358Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:57:03.067SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649
title Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649
spellingShingle Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649
Pierce, Michael
Ciencias Astronómicas
Galaxies: individual: NGC 4649
Galaxies: star clusters
Globular clusters: general
title_short Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649
title_full Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649
title_fullStr Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649
title_full_unstemmed Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649
title_sort Gemini/GMOS spectra of globular clusters in the Virgo giant elliptical NGC 4649
dc.creator.none.fl_str_mv Pierce, Michael
Bridges, Terry
Forbes, Duncan A.
Proctor, Robert
Beasley, Michael A.
Gebhardt, Karl
Faifer, Favio Raúl
Forte, Juan Carlos
Zepf, Stephen E.
Sharpies, Ray
Hanes, David A.
author Pierce, Michael
author_facet Pierce, Michael
Bridges, Terry
Forbes, Duncan A.
Proctor, Robert
Beasley, Michael A.
Gebhardt, Karl
Faifer, Favio Raúl
Forte, Juan Carlos
Zepf, Stephen E.
Sharpies, Ray
Hanes, David A.
author_role author
author2 Bridges, Terry
Forbes, Duncan A.
Proctor, Robert
Beasley, Michael A.
Gebhardt, Karl
Faifer, Favio Raúl
Forte, Juan Carlos
Zepf, Stephen E.
Sharpies, Ray
Hanes, David A.
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Galaxies: individual: NGC 4649
Galaxies: star clusters
Globular clusters: general
topic Ciencias Astronómicas
Galaxies: individual: NGC 4649
Galaxies: star clusters
Globular clusters: general
dc.description.none.fl_txt_mv NGC 4649 (M60) is one of a handful of giant Virgo ellipticals. We have obtained Gemini/GMOS (Gemini North Multi-Object Spectrograph) spectra for 38 globular clusters (GCs) associated with this galaxy. Applying the multi-index χ<SUP>2</SUP> minimization technique of Proctor and Sansom with the single stellar population models of Thomas, Maraston and Korn, we derive ages, metallicities and α-element abundance ratios. We find several young (2-3 Gyr old) supersolar metallicity GCs, while the majority are old (>10 Gyr), spanning a range of metallicities from solar to [Z/H] = -2. At least two of these young GCs are at large projected radii of 17-20 kpc. The galaxy itself shows no obvious signs of a recent starburst, interaction or merger. A trend of decreasing α-element ratio with increasing metallicity is found.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description NGC 4649 (M60) is one of a handful of giant Virgo ellipticals. We have obtained Gemini/GMOS (Gemini North Multi-Object Spectrograph) spectra for 38 globular clusters (GCs) associated with this galaxy. Applying the multi-index χ<SUP>2</SUP> minimization technique of Proctor and Sansom with the single stellar population models of Thomas, Maraston and Korn, we derive ages, metallicities and α-element abundance ratios. We find several young (2-3 Gyr old) supersolar metallicity GCs, while the majority are old (>10 Gyr), spanning a range of metallicities from solar to [Z/H] = -2. At least two of these young GCs are at large projected radii of 17-20 kpc. The galaxy itself shows no obvious signs of a recent starburst, interaction or merger. A trend of decreasing α-element ratio with increasing metallicity is found.
publishDate 2006
dc.date.none.fl_str_mv 2006
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/10915/84358
url http://sedici.unlp.edu.ar/handle/10915/84358
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/10.1111/j.1365-2966.2006.10097.x
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
325-334
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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score 12.982451

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