Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters

Autores
Granada, Anahi; Jones, C. E.; Sigut, A.; Semaan, T.; Georgy, C.; Meynet, G.; Ekstrom, S.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Through the modeling of near-infrared photometry of star-plus disk systems with the codes bedisk/beray, we successfully describe the Wide-Field Infrared Survey Explorer (WISE) photometric characteristics of Be stars in five young open clusters, NGC 663, NGC 869, NGC 884, NGC 3766, and NGC 4755, broadly studied in the literature. WISE photometry allows previously known Be stars to be detected and to find new Be candidates which could be confirmed spectroscopically. The location of Be stars in the WISE color-magnitude diagram, separates them in two groups; active (Be stars hosting a developed circumstellar disk) and quiescent objects (Be stars in a diskless phase), and this way, we can explore how often stars are observed in these different stages. The variability observed in most active variable Be stars is compatible with a disk dissipation phase. We find that 50% of Be stars in the studied open clusters are in an active phase. We can interpret this as Be stars having a developed circumstellar disk one-half of the time. The location of Be stars with a developed disk in the color-magnitude diagram require mass loss rates in agreement with values recently reported in the literature. For these objects, we expect to have a tight relation between the equivalent width of the Hα line and the mass of the disk, if the inclination is known. Also, near-infrared photometry of Be stars in stellar clusters has the potential of being useful to test whether there is a preferential viewing angle.
Fil: Granada, Anahi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Jones, C. E.. Western University; Canadá
Fil: Sigut, A.. Western University; Canadá
Fil: Semaan, T.. Observatoire Astronomique de L Universite de Geneve; Suiza
Fil: Georgy, C.. Observatoire Astronomique de L Universite de Geneve; Suiza
Fil: Meynet, G.. Observatoire Astronomique de L Universite de Geneve; Suiza
Fil: Ekstrom, S.. Observatoire Astronomique de L Universite de Geneve; Suiza
Materia
stars: activity
stars: emission-line, Be
infrared: stars
open clusters and associations
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:11336/82604
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open ClustersGranada, AnahiJones, C. E.Sigut, A.Semaan, T.Georgy, C.Meynet, G.Ekstrom, S.stars: activitystars: emission-line, Beinfrared: starsopen clusters and associationshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Through the modeling of near-infrared photometry of star-plus disk systems with the codes bedisk/beray, we successfully describe the Wide-Field Infrared Survey Explorer (WISE) photometric characteristics of Be stars in five young open clusters, NGC 663, NGC 869, NGC 884, NGC 3766, and NGC 4755, broadly studied in the literature. WISE photometry allows previously known Be stars to be detected and to find new Be candidates which could be confirmed spectroscopically. The location of Be stars in the WISE color-magnitude diagram, separates them in two groups; active (Be stars hosting a developed circumstellar disk) and quiescent objects (Be stars in a diskless phase), and this way, we can explore how often stars are observed in these different stages. The variability observed in most active variable Be stars is compatible with a disk dissipation phase. We find that 50% of Be stars in the studied open clusters are in an active phase. We can interpret this as Be stars having a developed circumstellar disk one-half of the time. The location of Be stars with a developed disk in the color-magnitude diagram require mass loss rates in agreement with values recently reported in the literature. For these objects, we expect to have a tight relation between the equivalent width of the Hα line and the mass of the disk, if the inclination is known. Also, near-infrared photometry of Be stars in stellar clusters has the potential of being useful to test whether there is a preferential viewing angle.Fil: Granada, Anahi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Jones, C. E.. Western University; CanadáFil: Sigut, A.. Western University; CanadáFil: Semaan, T.. Observatoire Astronomique de L Universite de Geneve; SuizaFil: Georgy, C.. Observatoire Astronomique de L Universite de Geneve; SuizaFil: Meynet, G.. Observatoire Astronomique de L Universite de Geneve; SuizaFil: Ekstrom, S.. Observatoire Astronomique de L Universite de Geneve; SuizaIOP Publishing2018-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/82604Granada, Anahi; Jones, C. E.; Sigut, A.; Semaan, T.; Georgy, C.; et al.; Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters; IOP Publishing; Astronomical Journal; 155; 1; 1-20180004-6256CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-3881/aa9f1dinfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-3881/aa9f1d/metainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-12T09:38:19Zoai:ri.conicet.gov.ar:11336/82604instacron: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:34982025-11-12 09:38:19.385CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters
title Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters
spellingShingle Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters
Granada, Anahi
stars: activity
stars: emission-line, Be
infrared: stars
open clusters and associations
title_short Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters
title_full Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters
title_fullStr Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters
title_full_unstemmed Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters
title_sort Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters
dc.creator.none.fl_str_mv Granada, Anahi
Jones, C. E.
Sigut, A.
Semaan, T.
Georgy, C.
Meynet, G.
Ekstrom, S.
author Granada, Anahi
author_facet Granada, Anahi
Jones, C. E.
Sigut, A.
Semaan, T.
Georgy, C.
Meynet, G.
Ekstrom, S.
author_role author
author2 Jones, C. E.
Sigut, A.
Semaan, T.
Georgy, C.
Meynet, G.
Ekstrom, S.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv stars: activity
stars: emission-line, Be
infrared: stars
open clusters and associations
topic stars: activity
stars: emission-line, Be
infrared: stars
open clusters and associations
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Through the modeling of near-infrared photometry of star-plus disk systems with the codes bedisk/beray, we successfully describe the Wide-Field Infrared Survey Explorer (WISE) photometric characteristics of Be stars in five young open clusters, NGC 663, NGC 869, NGC 884, NGC 3766, and NGC 4755, broadly studied in the literature. WISE photometry allows previously known Be stars to be detected and to find new Be candidates which could be confirmed spectroscopically. The location of Be stars in the WISE color-magnitude diagram, separates them in two groups; active (Be stars hosting a developed circumstellar disk) and quiescent objects (Be stars in a diskless phase), and this way, we can explore how often stars are observed in these different stages. The variability observed in most active variable Be stars is compatible with a disk dissipation phase. We find that 50% of Be stars in the studied open clusters are in an active phase. We can interpret this as Be stars having a developed circumstellar disk one-half of the time. The location of Be stars with a developed disk in the color-magnitude diagram require mass loss rates in agreement with values recently reported in the literature. For these objects, we expect to have a tight relation between the equivalent width of the Hα line and the mass of the disk, if the inclination is known. Also, near-infrared photometry of Be stars in stellar clusters has the potential of being useful to test whether there is a preferential viewing angle.
Fil: Granada, Anahi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Jones, C. E.. Western University; Canadá
Fil: Sigut, A.. Western University; Canadá
Fil: Semaan, T.. Observatoire Astronomique de L Universite de Geneve; Suiza
Fil: Georgy, C.. Observatoire Astronomique de L Universite de Geneve; Suiza
Fil: Meynet, G.. Observatoire Astronomique de L Universite de Geneve; Suiza
Fil: Ekstrom, S.. Observatoire Astronomique de L Universite de Geneve; Suiza
description Through the modeling of near-infrared photometry of star-plus disk systems with the codes bedisk/beray, we successfully describe the Wide-Field Infrared Survey Explorer (WISE) photometric characteristics of Be stars in five young open clusters, NGC 663, NGC 869, NGC 884, NGC 3766, and NGC 4755, broadly studied in the literature. WISE photometry allows previously known Be stars to be detected and to find new Be candidates which could be confirmed spectroscopically. The location of Be stars in the WISE color-magnitude diagram, separates them in two groups; active (Be stars hosting a developed circumstellar disk) and quiescent objects (Be stars in a diskless phase), and this way, we can explore how often stars are observed in these different stages. The variability observed in most active variable Be stars is compatible with a disk dissipation phase. We find that 50% of Be stars in the studied open clusters are in an active phase. We can interpret this as Be stars having a developed circumstellar disk one-half of the time. The location of Be stars with a developed disk in the color-magnitude diagram require mass loss rates in agreement with values recently reported in the literature. For these objects, we expect to have a tight relation between the equivalent width of the Hα line and the mass of the disk, if the inclination is known. Also, near-infrared photometry of Be stars in stellar clusters has the potential of being useful to test whether there is a preferential viewing angle.
publishDate 2018
dc.date.none.fl_str_mv 2018-01
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/11336/82604
Granada, Anahi; Jones, C. E.; Sigut, A.; Semaan, T.; Georgy, C.; et al.; Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters; IOP Publishing; Astronomical Journal; 155; 1; 1-2018
0004-6256
CONICET Digital
CONICET
url http://hdl.handle.net/11336/82604
identifier_str_mv Granada, Anahi; Jones, C. E.; Sigut, A.; Semaan, T.; Georgy, C.; et al.; Quiescent and active phases in Be stars: a WISE snapshot of Young Galactic Open Clusters; IOP Publishing; Astronomical Journal; 155; 1; 1-2018
0004-6256
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-3881/aa9f1d
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-3881/aa9f1d/meta
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 IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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 13.24909

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