Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755

Autores
Aidelman, Yael Judith; Cidale, Lydia Sonia; Zorec, J.; Arias, María Laura
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Spectroscopic investigations of galactic open clusters are scarce and limited to a reduced sample of cluster members. Aims. We intend to perform a complete study of the physical parameters of two galactic clusters as well as of their individual members. Methods. To carry out this study, we used the BCD (Barbier-Chalonge-Divan) spectrophotometric system, which is based on the study of the Balmer discontinuity and is independent of interstellar and circumstellar extinction. Additional physical properties were derived from the line profiles (FWHM) and stellar evolution models. We analyzed low-resolution spectra around the Balmer discontinuity for normal B-type and Be stars in two open clusters: NGC 3766 and NGC 4755. We determined the stellar fundamental parameters, such as effective temperatures, surface gravities, spectral types, luminosity classes, absolute and bolometric magnitudes, and color gradient excesses. The stellar rotation velocity was also determined. Complementary information, mainly stellar mass, age, and radius of the star population were calculated using stellar evolution models. In some cases, the stellar fundamental parameters were derived for the first time. The obtained results allowed us also to determine the reddening, age, and distance to the clusters. Results. The cluster parameters obtained through the BCD method agree very well with those derived from classical methods based on photometric data. The BCD system also provides physical properties of the star members. This study enables us to test the good behavior of M bol(λ 1,D)-calibrations and detect systematic discrepancies between log g estimates from model atmospheres and those derived from stellar evolution models. To improve our knowledge on the formation and evolution of the clusters, more statistical studies on the initial mass luminosity and angular momentum distributions should be addressed. Therefore, the BCD spectrophotometric system could be a powerful tool for studying far galactic and extragalactic clusters with the generation of large telescopes and the multi-object technique. © 2012 ESO.
Fil: Aidelman, Yael Judith. 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: Cidale, Lydia Sonia. 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: Zorec, J.. Université Pierre et Marie Curie; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Arias, María Laura. 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
Materia
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 3766
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 4755
STARS: EARLY-TYPE
STARS: EMISSION-LINE, BE
STARS: FUNDAMENTAL PARAMETERS
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:11336/145136
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755Aidelman, Yael JudithCidale, Lydia SoniaZorec, J.Arias, María LauraOPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 3766OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 4755STARS: EARLY-TYPESTARS: EMISSION-LINE, BESTARS: FUNDAMENTAL PARAMETERShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. Spectroscopic investigations of galactic open clusters are scarce and limited to a reduced sample of cluster members. Aims. We intend to perform a complete study of the physical parameters of two galactic clusters as well as of their individual members. Methods. To carry out this study, we used the BCD (Barbier-Chalonge-Divan) spectrophotometric system, which is based on the study of the Balmer discontinuity and is independent of interstellar and circumstellar extinction. Additional physical properties were derived from the line profiles (FWHM) and stellar evolution models. We analyzed low-resolution spectra around the Balmer discontinuity for normal B-type and Be stars in two open clusters: NGC 3766 and NGC 4755. We determined the stellar fundamental parameters, such as effective temperatures, surface gravities, spectral types, luminosity classes, absolute and bolometric magnitudes, and color gradient excesses. The stellar rotation velocity was also determined. Complementary information, mainly stellar mass, age, and radius of the star population were calculated using stellar evolution models. In some cases, the stellar fundamental parameters were derived for the first time. The obtained results allowed us also to determine the reddening, age, and distance to the clusters. Results. The cluster parameters obtained through the BCD method agree very well with those derived from classical methods based on photometric data. The BCD system also provides physical properties of the star members. This study enables us to test the good behavior of M bol(λ 1,D)-calibrations and detect systematic discrepancies between log g estimates from model atmospheres and those derived from stellar evolution models. To improve our knowledge on the formation and evolution of the clusters, more statistical studies on the initial mass luminosity and angular momentum distributions should be addressed. Therefore, the BCD spectrophotometric system could be a powerful tool for studying far galactic and extragalactic clusters with the generation of large telescopes and the multi-object technique. © 2012 ESO.Fil: Aidelman, Yael Judith. 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: Cidale, Lydia Sonia. 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: Zorec, J.. Université Pierre et Marie Curie; Francia. Centre National de la Recherche Scientifique; FranciaFil: Arias, María Laura. 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; ArgentinaEDP Sciences2012-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/145136Aidelman, Yael Judith; Cidale, Lydia Sonia; Zorec, J.; Arias, María Laura; Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755; EDP Sciences; Astronomy and Astrophysics; 544; 8-2012; 1-180004-63611432-0746CONICET DigitalCONICETenginfo:eu-repo/semantics/reference/url/http://adsabs.harvard.edu/abs/2012A%26A...544A..64Ainfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201219069info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2012/08/aa19069-12/aa19069-12.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 Técnicas2025-10-22T11:53:47Zoai:ri.conicet.gov.ar:11336/145136instacron: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:34982025-10-22 11:53:47.407CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755
title Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755
spellingShingle Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755
Aidelman, Yael Judith
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 3766
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 4755
STARS: EARLY-TYPE
STARS: EMISSION-LINE, BE
STARS: FUNDAMENTAL PARAMETERS
title_short Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755
title_full Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755
title_fullStr Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755
title_full_unstemmed Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755
title_sort Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755
dc.creator.none.fl_str_mv Aidelman, Yael Judith
Cidale, Lydia Sonia
Zorec, J.
Arias, María Laura
author Aidelman, Yael Judith
author_facet Aidelman, Yael Judith
Cidale, Lydia Sonia
Zorec, J.
Arias, María Laura
author_role author
author2 Cidale, Lydia Sonia
Zorec, J.
Arias, María Laura
author2_role author
author
author
dc.subject.none.fl_str_mv OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 3766
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 4755
STARS: EARLY-TYPE
STARS: EMISSION-LINE, BE
STARS: FUNDAMENTAL PARAMETERS
topic OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 3766
OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 4755
STARS: EARLY-TYPE
STARS: EMISSION-LINE, BE
STARS: FUNDAMENTAL PARAMETERS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. Spectroscopic investigations of galactic open clusters are scarce and limited to a reduced sample of cluster members. Aims. We intend to perform a complete study of the physical parameters of two galactic clusters as well as of their individual members. Methods. To carry out this study, we used the BCD (Barbier-Chalonge-Divan) spectrophotometric system, which is based on the study of the Balmer discontinuity and is independent of interstellar and circumstellar extinction. Additional physical properties were derived from the line profiles (FWHM) and stellar evolution models. We analyzed low-resolution spectra around the Balmer discontinuity for normal B-type and Be stars in two open clusters: NGC 3766 and NGC 4755. We determined the stellar fundamental parameters, such as effective temperatures, surface gravities, spectral types, luminosity classes, absolute and bolometric magnitudes, and color gradient excesses. The stellar rotation velocity was also determined. Complementary information, mainly stellar mass, age, and radius of the star population were calculated using stellar evolution models. In some cases, the stellar fundamental parameters were derived for the first time. The obtained results allowed us also to determine the reddening, age, and distance to the clusters. Results. The cluster parameters obtained through the BCD method agree very well with those derived from classical methods based on photometric data. The BCD system also provides physical properties of the star members. This study enables us to test the good behavior of M bol(λ 1,D)-calibrations and detect systematic discrepancies between log g estimates from model atmospheres and those derived from stellar evolution models. To improve our knowledge on the formation and evolution of the clusters, more statistical studies on the initial mass luminosity and angular momentum distributions should be addressed. Therefore, the BCD spectrophotometric system could be a powerful tool for studying far galactic and extragalactic clusters with the generation of large telescopes and the multi-object technique. © 2012 ESO.
Fil: Aidelman, Yael Judith. 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: Cidale, Lydia Sonia. 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: Zorec, J.. Université Pierre et Marie Curie; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Arias, María Laura. 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
description Context. Spectroscopic investigations of galactic open clusters are scarce and limited to a reduced sample of cluster members. Aims. We intend to perform a complete study of the physical parameters of two galactic clusters as well as of their individual members. Methods. To carry out this study, we used the BCD (Barbier-Chalonge-Divan) spectrophotometric system, which is based on the study of the Balmer discontinuity and is independent of interstellar and circumstellar extinction. Additional physical properties were derived from the line profiles (FWHM) and stellar evolution models. We analyzed low-resolution spectra around the Balmer discontinuity for normal B-type and Be stars in two open clusters: NGC 3766 and NGC 4755. We determined the stellar fundamental parameters, such as effective temperatures, surface gravities, spectral types, luminosity classes, absolute and bolometric magnitudes, and color gradient excesses. The stellar rotation velocity was also determined. Complementary information, mainly stellar mass, age, and radius of the star population were calculated using stellar evolution models. In some cases, the stellar fundamental parameters were derived for the first time. The obtained results allowed us also to determine the reddening, age, and distance to the clusters. Results. The cluster parameters obtained through the BCD method agree very well with those derived from classical methods based on photometric data. The BCD system also provides physical properties of the star members. This study enables us to test the good behavior of M bol(λ 1,D)-calibrations and detect systematic discrepancies between log g estimates from model atmospheres and those derived from stellar evolution models. To improve our knowledge on the formation and evolution of the clusters, more statistical studies on the initial mass luminosity and angular momentum distributions should be addressed. Therefore, the BCD spectrophotometric system could be a powerful tool for studying far galactic and extragalactic clusters with the generation of large telescopes and the multi-object technique. © 2012 ESO.
publishDate 2012
dc.date.none.fl_str_mv 2012-08
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/11336/145136
Aidelman, Yael Judith; Cidale, Lydia Sonia; Zorec, J.; Arias, María Laura; Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755; EDP Sciences; Astronomy and Astrophysics; 544; 8-2012; 1-18
0004-6361
1432-0746
CONICET Digital
CONICET
url http://hdl.handle.net/11336/145136
identifier_str_mv Aidelman, Yael Judith; Cidale, Lydia Sonia; Zorec, J.; Arias, María Laura; Open clusters: I. Fundamental parameters of B stars in NGC 3766 and NGC 4755; EDP Sciences; Astronomy and Astrophysics; 544; 8-2012; 1-18
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/reference/url/http://adsabs.harvard.edu/abs/2012A%26A...544A..64A
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201219069
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2012/08/aa19069-12/aa19069-12.html
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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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
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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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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