Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025
- Autores
- Aidelman, Yael Judith; Cidale, Lydia Sonia; Zorec, Juan; Panei, Jorge Alejandro
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Context. The knowledge of accurate values of effective temperature, surface gravity, and luminosity of stars in open clusters is very important not only to derive cluster distances and ages but also to discuss the stellar structure and evolution. Unfortunately, stellar parameters are still very scarce. Aims. Our goal is to study five open clusters to derive stellar parameters of the B and Be star population and discuss the cluster properties. In a near future, we intend to gather a statistically relevant samples of Be stars to discuss their origin and evolution. Methods. We use the Barbier-Chalonge-Divan spectrophotometric system, based on the study of low-resolution spectra around the Balmer discontinuity, since it is independent of the interstellar and circumstellar extinction and provides accurate Hertzsprung-Russell diagrams and stellar parameters. Results. We determine stellar fundamental parameters, such as effective temperatures, surface gravities, spectral types, luminosity classes, absolute and bolometric magnitudes and colour gradient excesses of the stars in the field of Collinder 223, Hogg 16,NGC2645, NGC3114, and NGC6025. Additional information, mainly masses and ages of cluster stellar populations, is obtained using stellar evolution models. In most cases, stellar fundamental parameters have been derived for the first time. We also discuss the derived cluster properties of reddening, age and distance. Conclusions. Collinder 223 cluster parameters are E(B − V) = 0.25 ± 0.03 mag and (mv − Mv)0 = 11.21 ± 0.25 mag. In Hogg 16, we clearly distinguish two groups of stars (Hogg 16a and Hogg 16b) with very different mean true distance moduli (8.91 ± 0.26 mag and 12.51 ± 0.38 mag), mean colour excesses (0.26 ± 0.03 mag and 0.63 ± 0.08 mag), and spectral types (B early-type and B late-/Atype stars, respectively). The farthest group could be merged with Collinder 272. NGC2645 is a young cluster (<14 Myr) with E(B − V) = 0.58±0.05 mag and (mv − Mv)0 = 12.18±0.30 mag. The cluster parameters of NGC 3114 are E(B − V) = 0.10 ± 0.01 mag and (mv − Mv)0 = 9.20 ± 0.15 mag. This cluster presents an important population of Be star, but it is difficult to define the cluster membership of stars because of the high contamination by field stars or the possible overlapping with a nearby cluster. Finally, we derive the following cluster parameters of NGC6025: E(B − V) = 0.34 ± 0.02 mag, (mv − Mv)0 = 9.25 ± 0.17 mag, and an age between 40 Myr and 69 Myr. In all the cases, new Be candidate stars are reported based on the appearance of a second Balmer discontinuity.
Fil: Aidelman, Yael Judith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
Fil: Zorec, Juan . Sorbonne Université; Francia
Fil: Panei, Jorge Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina - Materia
-
Collinder 223
Fundamental parameters
Emission lines
HOGG 16
NGC 2645
NGC 3114
NGC 6025
Be stars - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/14076
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/14076 |
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Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025Aidelman, Yael JudithCidale, Lydia SoniaZorec, Juan Panei, Jorge AlejandroCollinder 223Fundamental parametersEmission linesHOGG 16NGC 2645NGC 3114NGC 6025Be starshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. The knowledge of accurate values of effective temperature, surface gravity, and luminosity of stars in open clusters is very important not only to derive cluster distances and ages but also to discuss the stellar structure and evolution. Unfortunately, stellar parameters are still very scarce. Aims. Our goal is to study five open clusters to derive stellar parameters of the B and Be star population and discuss the cluster properties. In a near future, we intend to gather a statistically relevant samples of Be stars to discuss their origin and evolution. Methods. We use the Barbier-Chalonge-Divan spectrophotometric system, based on the study of low-resolution spectra around the Balmer discontinuity, since it is independent of the interstellar and circumstellar extinction and provides accurate Hertzsprung-Russell diagrams and stellar parameters. Results. We determine stellar fundamental parameters, such as effective temperatures, surface gravities, spectral types, luminosity classes, absolute and bolometric magnitudes and colour gradient excesses of the stars in the field of Collinder 223, Hogg 16,NGC2645, NGC3114, and NGC6025. Additional information, mainly masses and ages of cluster stellar populations, is obtained using stellar evolution models. In most cases, stellar fundamental parameters have been derived for the first time. We also discuss the derived cluster properties of reddening, age and distance. Conclusions. Collinder 223 cluster parameters are E(B − V) = 0.25 ± 0.03 mag and (mv − Mv)0 = 11.21 ± 0.25 mag. In Hogg 16, we clearly distinguish two groups of stars (Hogg 16a and Hogg 16b) with very different mean true distance moduli (8.91 ± 0.26 mag and 12.51 ± 0.38 mag), mean colour excesses (0.26 ± 0.03 mag and 0.63 ± 0.08 mag), and spectral types (B early-type and B late-/Atype stars, respectively). The farthest group could be merged with Collinder 272. NGC2645 is a young cluster (<14 Myr) with E(B − V) = 0.58±0.05 mag and (mv − Mv)0 = 12.18±0.30 mag. The cluster parameters of NGC 3114 are E(B − V) = 0.10 ± 0.01 mag and (mv − Mv)0 = 9.20 ± 0.15 mag. This cluster presents an important population of Be star, but it is difficult to define the cluster membership of stars because of the high contamination by field stars or the possible overlapping with a nearby cluster. Finally, we derive the following cluster parameters of NGC6025: E(B − V) = 0.34 ± 0.02 mag, (mv − Mv)0 = 9.25 ± 0.17 mag, and an age between 40 Myr and 69 Myr. In all the cases, new Be candidate stars are reported based on the appearance of a second Balmer discontinuity.Fil: Aidelman, Yael Judith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; ArgentinaFil: Zorec, Juan . Sorbonne Université; FranciaFil: Panei, Jorge Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaEdp Sciences2015-05info: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/11336/14076Aidelman, Yael Judith; Cidale, Lydia Sonia; Zorec, Juan ; Panei, Jorge Alejandro; Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025; Edp Sciences; Astronomy And Astrophysics; 577; 5-2015; 45-620004-6361enginfo:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2015/05/aa25085-14/aa25085-14.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201425085info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:36:33Zoai:ri.conicet.gov.ar:11336/14076instacron: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 09:36:33.486CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025 |
title |
Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025 |
spellingShingle |
Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025 Aidelman, Yael Judith Collinder 223 Fundamental parameters Emission lines HOGG 16 NGC 2645 NGC 3114 NGC 6025 Be stars |
title_short |
Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025 |
title_full |
Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025 |
title_fullStr |
Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025 |
title_full_unstemmed |
Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025 |
title_sort |
Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025 |
dc.creator.none.fl_str_mv |
Aidelman, Yael Judith Cidale, Lydia Sonia Zorec, Juan Panei, Jorge Alejandro |
author |
Aidelman, Yael Judith |
author_facet |
Aidelman, Yael Judith Cidale, Lydia Sonia Zorec, Juan Panei, Jorge Alejandro |
author_role |
author |
author2 |
Cidale, Lydia Sonia Zorec, Juan Panei, Jorge Alejandro |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Collinder 223 Fundamental parameters Emission lines HOGG 16 NGC 2645 NGC 3114 NGC 6025 Be stars |
topic |
Collinder 223 Fundamental parameters Emission lines HOGG 16 NGC 2645 NGC 3114 NGC 6025 Be stars |
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. The knowledge of accurate values of effective temperature, surface gravity, and luminosity of stars in open clusters is very important not only to derive cluster distances and ages but also to discuss the stellar structure and evolution. Unfortunately, stellar parameters are still very scarce. Aims. Our goal is to study five open clusters to derive stellar parameters of the B and Be star population and discuss the cluster properties. In a near future, we intend to gather a statistically relevant samples of Be stars to discuss their origin and evolution. Methods. We use the Barbier-Chalonge-Divan spectrophotometric system, based on the study of low-resolution spectra around the Balmer discontinuity, since it is independent of the interstellar and circumstellar extinction and provides accurate Hertzsprung-Russell diagrams and stellar parameters. Results. We determine stellar fundamental parameters, such as effective temperatures, surface gravities, spectral types, luminosity classes, absolute and bolometric magnitudes and colour gradient excesses of the stars in the field of Collinder 223, Hogg 16,NGC2645, NGC3114, and NGC6025. Additional information, mainly masses and ages of cluster stellar populations, is obtained using stellar evolution models. In most cases, stellar fundamental parameters have been derived for the first time. We also discuss the derived cluster properties of reddening, age and distance. Conclusions. Collinder 223 cluster parameters are E(B − V) = 0.25 ± 0.03 mag and (mv − Mv)0 = 11.21 ± 0.25 mag. In Hogg 16, we clearly distinguish two groups of stars (Hogg 16a and Hogg 16b) with very different mean true distance moduli (8.91 ± 0.26 mag and 12.51 ± 0.38 mag), mean colour excesses (0.26 ± 0.03 mag and 0.63 ± 0.08 mag), and spectral types (B early-type and B late-/Atype stars, respectively). The farthest group could be merged with Collinder 272. NGC2645 is a young cluster (<14 Myr) with E(B − V) = 0.58±0.05 mag and (mv − Mv)0 = 12.18±0.30 mag. The cluster parameters of NGC 3114 are E(B − V) = 0.10 ± 0.01 mag and (mv − Mv)0 = 9.20 ± 0.15 mag. This cluster presents an important population of Be star, but it is difficult to define the cluster membership of stars because of the high contamination by field stars or the possible overlapping with a nearby cluster. Finally, we derive the following cluster parameters of NGC6025: E(B − V) = 0.34 ± 0.02 mag, (mv − Mv)0 = 9.25 ± 0.17 mag, and an age between 40 Myr and 69 Myr. In all the cases, new Be candidate stars are reported based on the appearance of a second Balmer discontinuity. Fil: Aidelman, Yael Judith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina Fil: Zorec, Juan . Sorbonne Université; Francia Fil: Panei, Jorge Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina |
description |
Context. The knowledge of accurate values of effective temperature, surface gravity, and luminosity of stars in open clusters is very important not only to derive cluster distances and ages but also to discuss the stellar structure and evolution. Unfortunately, stellar parameters are still very scarce. Aims. Our goal is to study five open clusters to derive stellar parameters of the B and Be star population and discuss the cluster properties. In a near future, we intend to gather a statistically relevant samples of Be stars to discuss their origin and evolution. Methods. We use the Barbier-Chalonge-Divan spectrophotometric system, based on the study of low-resolution spectra around the Balmer discontinuity, since it is independent of the interstellar and circumstellar extinction and provides accurate Hertzsprung-Russell diagrams and stellar parameters. Results. We determine stellar fundamental parameters, such as effective temperatures, surface gravities, spectral types, luminosity classes, absolute and bolometric magnitudes and colour gradient excesses of the stars in the field of Collinder 223, Hogg 16,NGC2645, NGC3114, and NGC6025. Additional information, mainly masses and ages of cluster stellar populations, is obtained using stellar evolution models. In most cases, stellar fundamental parameters have been derived for the first time. We also discuss the derived cluster properties of reddening, age and distance. Conclusions. Collinder 223 cluster parameters are E(B − V) = 0.25 ± 0.03 mag and (mv − Mv)0 = 11.21 ± 0.25 mag. In Hogg 16, we clearly distinguish two groups of stars (Hogg 16a and Hogg 16b) with very different mean true distance moduli (8.91 ± 0.26 mag and 12.51 ± 0.38 mag), mean colour excesses (0.26 ± 0.03 mag and 0.63 ± 0.08 mag), and spectral types (B early-type and B late-/Atype stars, respectively). The farthest group could be merged with Collinder 272. NGC2645 is a young cluster (<14 Myr) with E(B − V) = 0.58±0.05 mag and (mv − Mv)0 = 12.18±0.30 mag. The cluster parameters of NGC 3114 are E(B − V) = 0.10 ± 0.01 mag and (mv − Mv)0 = 9.20 ± 0.15 mag. This cluster presents an important population of Be star, but it is difficult to define the cluster membership of stars because of the high contamination by field stars or the possible overlapping with a nearby cluster. Finally, we derive the following cluster parameters of NGC6025: E(B − V) = 0.34 ± 0.02 mag, (mv − Mv)0 = 9.25 ± 0.17 mag, and an age between 40 Myr and 69 Myr. In all the cases, new Be candidate stars are reported based on the appearance of a second Balmer discontinuity. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-05 |
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/11336/14076 Aidelman, Yael Judith; Cidale, Lydia Sonia; Zorec, Juan ; Panei, Jorge Alejandro; Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025; Edp Sciences; Astronomy And Astrophysics; 577; 5-2015; 45-62 0004-6361 |
url |
http://hdl.handle.net/11336/14076 |
identifier_str_mv |
Aidelman, Yael Judith; Cidale, Lydia Sonia; Zorec, Juan ; Panei, Jorge Alejandro; Open clusters: II fundamental parameters of B stars in Collinder 223, Hogg 16, NGC2645, NGC3114, and NGC6025; Edp Sciences; Astronomy And Astrophysics; 577; 5-2015; 45-62 0004-6361 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2015/05/aa25085-14/aa25085-14.html info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201425085 |
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 |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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13.070432 |