Extended main sequence turn-offs in low mass intermediate-age clusters

Autores
Piatti, Andres Eduardo; Bastian, Nate
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present an imaging analysis of four low mass stellar clusters (≤5000 M⊙) in the outer regions of the LMC in order to shed light on the extended main sequence turn-off (eMSTO) phenomenon observed in high mass clusters. The four clusters have ages between 1-2 Gyr and two of them appear to host eMTSOs. The discovery of eMSTOs in such low mass clusters - more than 5 times less massive than the eMSTO clusters previously studied - suggests that mass is not the controlling factor in whether clusters host eMSTOs. Additionally, the narrow extent of the eMSTO in the two older clusters (2 Gyr) is in agreement with predictions of the stellar rotation scenario, as lower mass stars are expected to be magnetically braked, meaning that their colour magnitude diagrams should be better reproduced by canonical simple stellar populations. We also performed a structural analysis on all the clusters and found that a large core radius is not a requisite for a cluster to exhibit an eMSTO.
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Bastian, Nate. Liverpool John Moores University; Reino Unido
Materia
GALAXIES: INDIVIDUAL: LMC
MAGELLANIC CLOUDS
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:11336/180052
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Extended main sequence turn-offs in low mass intermediate-age clustersPiatti, Andres EduardoBastian, NateGALAXIES: INDIVIDUAL: LMCMAGELLANIC CLOUDSTECHNIQUES: PHOTOMETRIChttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1We present an imaging analysis of four low mass stellar clusters (≤5000 M⊙) in the outer regions of the LMC in order to shed light on the extended main sequence turn-off (eMSTO) phenomenon observed in high mass clusters. The four clusters have ages between 1-2 Gyr and two of them appear to host eMTSOs. The discovery of eMSTOs in such low mass clusters - more than 5 times less massive than the eMSTO clusters previously studied - suggests that mass is not the controlling factor in whether clusters host eMSTOs. Additionally, the narrow extent of the eMSTO in the two older clusters (2 Gyr) is in agreement with predictions of the stellar rotation scenario, as lower mass stars are expected to be magnetically braked, meaning that their colour magnitude diagrams should be better reproduced by canonical simple stellar populations. We also performed a structural analysis on all the clusters and found that a large core radius is not a requisite for a cluster to exhibit an eMSTO.Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: Bastian, Nate. Liverpool John Moores University; Reino UnidoEDP Sciences2016-06info: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/11336/180052Piatti, Andres Eduardo; Bastian, Nate; Extended main sequence turn-offs in low mass intermediate-age clusters; EDP Sciences; Astronomy and Astrophysics; 590; A50; 6-2016; 50-600004-63611432-0746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2016/06/aa28339-16/aa28339-16.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201628339info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:51Zoai:ri.conicet.gov.ar:11336/180052instacron: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 09:35:51.969CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Extended main sequence turn-offs in low mass intermediate-age clusters
title Extended main sequence turn-offs in low mass intermediate-age clusters
spellingShingle Extended main sequence turn-offs in low mass intermediate-age clusters
Piatti, Andres Eduardo
GALAXIES: INDIVIDUAL: LMC
MAGELLANIC CLOUDS
TECHNIQUES: PHOTOMETRIC
title_short Extended main sequence turn-offs in low mass intermediate-age clusters
title_full Extended main sequence turn-offs in low mass intermediate-age clusters
title_fullStr Extended main sequence turn-offs in low mass intermediate-age clusters
title_full_unstemmed Extended main sequence turn-offs in low mass intermediate-age clusters
title_sort Extended main sequence turn-offs in low mass intermediate-age clusters
dc.creator.none.fl_str_mv Piatti, Andres Eduardo
Bastian, Nate
author Piatti, Andres Eduardo
author_facet Piatti, Andres Eduardo
Bastian, Nate
author_role author
author2 Bastian, Nate
author2_role author
dc.subject.none.fl_str_mv GALAXIES: INDIVIDUAL: LMC
MAGELLANIC CLOUDS
TECHNIQUES: PHOTOMETRIC
topic GALAXIES: INDIVIDUAL: LMC
MAGELLANIC CLOUDS
TECHNIQUES: PHOTOMETRIC
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present an imaging analysis of four low mass stellar clusters (≤5000 M⊙) in the outer regions of the LMC in order to shed light on the extended main sequence turn-off (eMSTO) phenomenon observed in high mass clusters. The four clusters have ages between 1-2 Gyr and two of them appear to host eMTSOs. The discovery of eMSTOs in such low mass clusters - more than 5 times less massive than the eMSTO clusters previously studied - suggests that mass is not the controlling factor in whether clusters host eMSTOs. Additionally, the narrow extent of the eMSTO in the two older clusters (2 Gyr) is in agreement with predictions of the stellar rotation scenario, as lower mass stars are expected to be magnetically braked, meaning that their colour magnitude diagrams should be better reproduced by canonical simple stellar populations. We also performed a structural analysis on all the clusters and found that a large core radius is not a requisite for a cluster to exhibit an eMSTO.
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: Bastian, Nate. Liverpool John Moores University; Reino Unido
description We present an imaging analysis of four low mass stellar clusters (≤5000 M⊙) in the outer regions of the LMC in order to shed light on the extended main sequence turn-off (eMSTO) phenomenon observed in high mass clusters. The four clusters have ages between 1-2 Gyr and two of them appear to host eMTSOs. The discovery of eMSTOs in such low mass clusters - more than 5 times less massive than the eMSTO clusters previously studied - suggests that mass is not the controlling factor in whether clusters host eMSTOs. Additionally, the narrow extent of the eMSTO in the two older clusters (2 Gyr) is in agreement with predictions of the stellar rotation scenario, as lower mass stars are expected to be magnetically braked, meaning that their colour magnitude diagrams should be better reproduced by canonical simple stellar populations. We also performed a structural analysis on all the clusters and found that a large core radius is not a requisite for a cluster to exhibit an eMSTO.
publishDate 2016
dc.date.none.fl_str_mv 2016-06
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/11336/180052
Piatti, Andres Eduardo; Bastian, Nate; Extended main sequence turn-offs in low mass intermediate-age clusters; EDP Sciences; Astronomy and Astrophysics; 590; A50; 6-2016; 50-60
0004-6361
1432-0746
CONICET Digital
CONICET
url http://hdl.handle.net/11336/180052
identifier_str_mv Piatti, Andres Eduardo; Bastian, Nate; Extended main sequence turn-offs in low mass intermediate-age clusters; EDP Sciences; Astronomy and Astrophysics; 590; A50; 6-2016; 50-60
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/articles/aa/abs/2016/06/aa28339-16/aa28339-16.html
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201628339
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 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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score 13.070432

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