Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971

We revisited the young Large Magellanic Cloud star cluster NGC 1971 with the aim of providing additional clues to our understanding of its observed extended Main Sequence turnoff (eMSTO), a feature common seen in young stars clusters,which was recently argued to be caused by a real age spread simila...

Descripción completa

Detalles Bibliográficos
Autor: Piatti, Andres Eduardo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/140434
Acceso en línea:http://hdl.handle.net/11336/140434
Access Level:acceso abierto
Palabra clave:GALAXIES: INDIVIDUAL: LMC
GALAXIES: STAR CLUSTERS: GENERAL
GALAXIES: STAR CLUSTERS: INDIVIDUAL: NGC 1971
TECHNIQUES: PHOTOMETRIC
https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
id AR_2e10fc0da487d66dc3fac89ff89e7d40
oai_identifier_str oai:ri.conicet.gov.ar:11336/140434
network_acronym_str AR
network_name_str Argentina
repository_id_str
spelling Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971Piatti, Andres EduardoGALAXIES: INDIVIDUAL: LMCGALAXIES: STAR CLUSTERS: GENERALGALAXIES: STAR CLUSTERS: INDIVIDUAL: NGC 1971TECHNIQUES: PHOTOMETRIChttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1We revisited the young Large Magellanic Cloud star cluster NGC 1971 with the aim of providing additional clues to our understanding of its observed extended Main Sequence turnoff (eMSTO), a feature common seen in young stars clusters,which was recently argued to be caused by a real age spread similar to the cluster age (∼160 Myr). We combined accurate Washington and Strömgren photometry of high membership probability stars to explore the nature of such an eMSTO. From different ad hoc defined pseudo colors we found that bluer and redder stars distributed throughout the eMSTO do not show any inhomogeneities of light and heavy-element abundances. These ’blue’ and ’red’ stars split into two clearly different groups only when the Washington M magnitudes are employed, which delimites the number of spectral features responsible for the appearance of the eMSTO. We speculate that Be stars populate the eMSTO of NGC 1971 because: i) Hβ contributes to the M passband; ii) Hβ emissions are common features of Be stars and; iii) Washington M and T1 magnitudes show a tight correlation; the latter measuring the observed contribution of Hα emission line in Be stars, which in turn correlates with Hβ emissions. As far as we are aware, this is the first observational result pointing to Hβ emissions as the origin of eMSTOs observed in young star clusters. The presence outcome will certainly open new possibilities of studying eMSTO from photometric systems with passbands centered at features commonly seen in Be stars.Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Interdisciplinario de Ciencias Básicas. - Universidad Nacional de Cuyo. Instituto Interdisciplinario de Ciencias Básicas; ArgentinaEDP Sciences2020-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/140434Piatti, Andres Eduardo; Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971; EDP Sciences; Astronomy and Astrophysics; 644; 98; 10-2020; 1-40004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202038993info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2020/12/aa38993-20/aa38993-20.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:43:22Zoai:ri.conicet.gov.ar:11336/140434instacron: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:34982024-05-08 13:43:22.844CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971
title Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971
spellingShingle Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971
Piatti, Andres Eduardo
GALAXIES: INDIVIDUAL: LMC
GALAXIES: STAR CLUSTERS: GENERAL
GALAXIES: STAR CLUSTERS: INDIVIDUAL: NGC 1971
TECHNIQUES: PHOTOMETRIC
https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
title_short Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971
title_full Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971
title_fullStr Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971
title_full_unstemmed Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971
title_sort Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971
dc.creator.none.fl_str_mv Piatti, Andres Eduardo
author Piatti, Andres Eduardo
author_facet Piatti, Andres Eduardo
author_role author
dc.subject.none.fl_str_mv GALAXIES: INDIVIDUAL: LMC
GALAXIES: STAR CLUSTERS: GENERAL
GALAXIES: STAR CLUSTERS: INDIVIDUAL: NGC 1971
TECHNIQUES: PHOTOMETRIC
https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
topic GALAXIES: INDIVIDUAL: LMC
GALAXIES: STAR CLUSTERS: GENERAL
GALAXIES: STAR CLUSTERS: INDIVIDUAL: NGC 1971
TECHNIQUES: PHOTOMETRIC
https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
description We revisited the young Large Magellanic Cloud star cluster NGC 1971 with the aim of providing additional clues to our understanding of its observed extended Main Sequence turnoff (eMSTO), a feature common seen in young stars clusters,which was recently argued to be caused by a real age spread similar to the cluster age (∼160 Myr). We combined accurate Washington and Strömgren photometry of high membership probability stars to explore the nature of such an eMSTO. From different ad hoc defined pseudo colors we found that bluer and redder stars distributed throughout the eMSTO do not show any inhomogeneities of light and heavy-element abundances. These ’blue’ and ’red’ stars split into two clearly different groups only when the Washington M magnitudes are employed, which delimites the number of spectral features responsible for the appearance of the eMSTO. We speculate that Be stars populate the eMSTO of NGC 1971 because: i) Hβ contributes to the M passband; ii) Hβ emissions are common features of Be stars and; iii) Washington M and T1 magnitudes show a tight correlation; the latter measuring the observed contribution of Hα emission line in Be stars, which in turn correlates with Hβ emissions. As far as we are aware, this is the first observational result pointing to Hβ emissions as the origin of eMSTOs observed in young star clusters. The presence outcome will certainly open new possibilities of studying eMSTO from photometric systems with passbands centered at features commonly seen in Be stars.
publishDate 2020
dc.date.none.fl_str_mv 2020-10
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/11336/140434
Piatti, Andres Eduardo; Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971; EDP Sciences; Astronomy and Astrophysics; 644; 98; 10-2020; 1-4
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/140434
identifier_str_mv Piatti, Andres Eduardo; Multiple populations of Hβ emission line stars in the large magellanic cloud cluster NGC 1971; EDP Sciences; Astronomy and Astrophysics; 644; 98; 10-2020; 1-4
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202038993
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2020/12/aa38993-20/aa38993-20.html
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
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
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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_ 1799195095686184960
score 15,811543

Similares en LA Referencia