Metallicity maps of the globular cluster system in the galaxy

The spatial metallicity distribution in the Galaxy, as depicted by the globular cluster system, is analyzed. Two metallicity maps (on the ω - |Z| plane) corresponding to the halo and disk subsamples (Zinn 1985) have been obtained. The resulting pictures reveal the existence of a highly structured ab...

Descripción completa

Detalles Bibliográficos
Autores: Alfaro, Emilio J., Cabrera Caño, Jesús María, Delgado, Antonio J.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1993
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/62385
Acceso en línea:http://hdl.handle.net/11441/62385
https://doi.org/10.1086/186698
Access Level:acceso abierto
Palabra clave:Globular clusters:general
Galaxy:halo
id ES_c06faa1dda79c78c972963ca03c8ff30
oai_identifier_str oai:idus.us.es:11441/62385
network_acronym_str ES
network_name_str España
repository_id_str
spelling Metallicity maps of the globular cluster system in the galaxyAlfaro, Emilio J.Cabrera Caño, Jesús MaríaDelgado, Antonio J.Globular clusters:generalGalaxy:haloThe spatial metallicity distribution in the Galaxy, as depicted by the globular cluster system, is analyzed. Two metallicity maps (on the ω - |Z| plane) corresponding to the halo and disk subsamples (Zinn 1985) have been obtained. The resulting pictures reveal the existence of a highly structured abundance pattern for the two subsystems. Variations of the metallicity with ω as well as with |Z| are clearly evidenced in both maps. However, the slope of these variations is very dependent on the direction chosen to estimate the gradient. This effect is particularly pronounced for the halo sample of globular clusters. Our results indicate that the metallicity distribution of the halo subsystem does not allow a simple description in terms of a single, direction independent gradient and that, possibly, this is the main cause of the long-standing controversy generated around the search for such a gradient. Superposed on this large-scale structure is the clearly visible presence of several metallicity patches of variable size. The most striking of them is a low-metallicity spot (LMS) located at the solar galactocentric radius, which extends up to 6 kpc away from the Galactic plane.Dirección General de Investigación Científica y Técnica (DGICYT)Consejería de Educacion y Ciencia Junta de AndalucíaIOP Publishing Ltd.Física Atómica, Molecular y NuclearDirección General de Investigación Científica y Técnica (DGICYT). EspañaJunta de Andalucía1993info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/11441/62385https://doi.org/10.1086/186698reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésAstrophysical Journal, 402 (2), L53-L56.http://dx.doi.org/10.1086/186698info:eu-repo/semantics/openAccessoai:idus.us.es:11441/623852026-06-17T12:51:07Z
dc.title.none.fl_str_mv Metallicity maps of the globular cluster system in the galaxy
title Metallicity maps of the globular cluster system in the galaxy
spellingShingle Metallicity maps of the globular cluster system in the galaxy
Alfaro, Emilio J.
Globular clusters:general
Galaxy:halo
title_short Metallicity maps of the globular cluster system in the galaxy
title_full Metallicity maps of the globular cluster system in the galaxy
title_fullStr Metallicity maps of the globular cluster system in the galaxy
title_full_unstemmed Metallicity maps of the globular cluster system in the galaxy
title_sort Metallicity maps of the globular cluster system in the galaxy
dc.creator.none.fl_str_mv Alfaro, Emilio J.
Cabrera Caño, Jesús María
Delgado, Antonio J.
author Alfaro, Emilio J.
author_facet Alfaro, Emilio J.
Cabrera Caño, Jesús María
Delgado, Antonio J.
author_role author
author2 Cabrera Caño, Jesús María
Delgado, Antonio J.
author2_role author
author
dc.contributor.none.fl_str_mv Física Atómica, Molecular y Nuclear
Dirección General de Investigación Científica y Técnica (DGICYT). España
Junta de Andalucía
dc.subject.none.fl_str_mv Globular clusters:general
Galaxy:halo
topic Globular clusters:general
Galaxy:halo
description The spatial metallicity distribution in the Galaxy, as depicted by the globular cluster system, is analyzed. Two metallicity maps (on the ω - |Z| plane) corresponding to the halo and disk subsamples (Zinn 1985) have been obtained. The resulting pictures reveal the existence of a highly structured abundance pattern for the two subsystems. Variations of the metallicity with ω as well as with |Z| are clearly evidenced in both maps. However, the slope of these variations is very dependent on the direction chosen to estimate the gradient. This effect is particularly pronounced for the halo sample of globular clusters. Our results indicate that the metallicity distribution of the halo subsystem does not allow a simple description in terms of a single, direction independent gradient and that, possibly, this is the main cause of the long-standing controversy generated around the search for such a gradient. Superposed on this large-scale structure is the clearly visible presence of several metallicity patches of variable size. The most striking of them is a low-metallicity spot (LMS) located at the solar galactocentric radius, which extends up to 6 kpc away from the Galactic plane.
publishDate 1993
dc.date.none.fl_str_mv 1993
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11441/62385
https://doi.org/10.1086/186698
url http://hdl.handle.net/11441/62385
https://doi.org/10.1086/186698
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Astrophysical Journal, 402 (2), L53-L56.
http://dx.doi.org/10.1086/186698
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing Ltd.
publisher.none.fl_str_mv IOP Publishing Ltd.
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869418477297598464
score 15,300719

Similares en LA Referencia