NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm

Autores
Claria Olmedo, Juan Jose; Piatti, Andres Eduardo; Parisi, Maria Celeste; Ahumada, Andrea Veronica
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
New CCD photometry in the Washington system C and T1 passbands down to T1 ∼ 18.5 mag in the field of the northern open cluster NGC 2236 is presented. T1 magnitudes and C − T1 colours for a total of 1162 stars within an area of 13.6 × 13.6 arcmin2 were measured. These CCD data were supplemented with photoelectric CMT1T2 photometry of 13 red giant candidates. The comparison of the cluster (T1, C − T1) colour–magnitude diagram with theoretical isochrones computed for the Washington system yields E(C − T1) = 1.10 ± 0.10 and T1 − MT1 = 13.45 ± 0.25 for log t = 8.80 (t = 600+100 −40 Myr) and Z = 0.008. The derived E(C − T1) value implies E(B − V) = 0.55 ± 0.05. NGC 2236 is then located at 2.5 ± 0.5 kpc from the Sun beyond the Perseus spiral arm and at ∼10.8 kpc from the Galactic centre. A cluster angular diameter of 9.4 arcmin, equivalent to 6.8 pc, was estimated from star counts both within and outside the cluster field. We also derived from the stellar density profile a cluster core radius of rc = 1.7 arcmin (1.2 pc) and an annular corona of rc = 1.8rc (2.2 pc). Five independent Washington abundance indices yield a mean cluster metallicity of [Fe/H] = −0.3 ± 0.2, which is not only in reasonably good agreement with the one obtained from the isochrone fit, but also compatible with the existence of a radial abundance gradient in the Galactic disc. We examined the properties of a sample of 20 known open clusters aligned along the lineof-sight to NGC 2236. Berkeley 27 appears as the farthest and oldest cluster of the studied sample.
Fil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Ahumada, Andrea Veronica. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Clusters
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:11336/21963
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral armClaria Olmedo, Juan JosePiatti, Andres EduardoParisi, Maria CelesteAhumada, Andrea VeronicaClustershttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1New CCD photometry in the Washington system C and T1 passbands down to T1 ∼ 18.5 mag in the field of the northern open cluster NGC 2236 is presented. T1 magnitudes and C − T1 colours for a total of 1162 stars within an area of 13.6 × 13.6 arcmin2 were measured. These CCD data were supplemented with photoelectric CMT1T2 photometry of 13 red giant candidates. The comparison of the cluster (T1, C − T1) colour–magnitude diagram with theoretical isochrones computed for the Washington system yields E(C − T1) = 1.10 ± 0.10 and T1 − MT1 = 13.45 ± 0.25 for log t = 8.80 (t = 600+100 −40 Myr) and Z = 0.008. The derived E(C − T1) value implies E(B − V) = 0.55 ± 0.05. NGC 2236 is then located at 2.5 ± 0.5 kpc from the Sun beyond the Perseus spiral arm and at ∼10.8 kpc from the Galactic centre. A cluster angular diameter of 9.4 arcmin, equivalent to 6.8 pc, was estimated from star counts both within and outside the cluster field. We also derived from the stellar density profile a cluster core radius of rc = 1.7 arcmin (1.2 pc) and an annular corona of rc = 1.8rc (2.2 pc). Five independent Washington abundance indices yield a mean cluster metallicity of [Fe/H] = −0.3 ± 0.2, which is not only in reasonably good agreement with the one obtained from the isochrone fit, but also compatible with the existence of a radial abundance gradient in the Galactic disc. We examined the properties of a sample of 20 known open clusters aligned along the lineof-sight to NGC 2236. Berkeley 27 appears as the farthest and oldest cluster of the studied sample.Fil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ahumada, Andrea Veronica. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaOxford University Press2007-07info: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/11336/21963Claria Olmedo, Juan Jose; Piatti, Andres Eduardo; Parisi, Maria Celeste; Ahumada, Andrea Veronica; NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 379; 1; 7-2007; 159-1680035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2007.11920.xinfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-lookup/doi/10.1111/j.1365-2966.2007.11920.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:32:21Zoai:ri.conicet.gov.ar:11336/21963instacron: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 10:32:22.085CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm
title NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm
spellingShingle NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm
Claria Olmedo, Juan Jose
Clusters
title_short NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm
title_full NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm
title_fullStr NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm
title_full_unstemmed NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm
title_sort NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm
dc.creator.none.fl_str_mv Claria Olmedo, Juan Jose
Piatti, Andres Eduardo
Parisi, Maria Celeste
Ahumada, Andrea Veronica
author Claria Olmedo, Juan Jose
author_facet Claria Olmedo, Juan Jose
Piatti, Andres Eduardo
Parisi, Maria Celeste
Ahumada, Andrea Veronica
author_role author
author2 Piatti, Andres Eduardo
Parisi, Maria Celeste
Ahumada, Andrea Veronica
author2_role author
author
author
dc.subject.none.fl_str_mv Clusters
topic Clusters
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv New CCD photometry in the Washington system C and T1 passbands down to T1 ∼ 18.5 mag in the field of the northern open cluster NGC 2236 is presented. T1 magnitudes and C − T1 colours for a total of 1162 stars within an area of 13.6 × 13.6 arcmin2 were measured. These CCD data were supplemented with photoelectric CMT1T2 photometry of 13 red giant candidates. The comparison of the cluster (T1, C − T1) colour–magnitude diagram with theoretical isochrones computed for the Washington system yields E(C − T1) = 1.10 ± 0.10 and T1 − MT1 = 13.45 ± 0.25 for log t = 8.80 (t = 600+100 −40 Myr) and Z = 0.008. The derived E(C − T1) value implies E(B − V) = 0.55 ± 0.05. NGC 2236 is then located at 2.5 ± 0.5 kpc from the Sun beyond the Perseus spiral arm and at ∼10.8 kpc from the Galactic centre. A cluster angular diameter of 9.4 arcmin, equivalent to 6.8 pc, was estimated from star counts both within and outside the cluster field. We also derived from the stellar density profile a cluster core radius of rc = 1.7 arcmin (1.2 pc) and an annular corona of rc = 1.8rc (2.2 pc). Five independent Washington abundance indices yield a mean cluster metallicity of [Fe/H] = −0.3 ± 0.2, which is not only in reasonably good agreement with the one obtained from the isochrone fit, but also compatible with the existence of a radial abundance gradient in the Galactic disc. We examined the properties of a sample of 20 known open clusters aligned along the lineof-sight to NGC 2236. Berkeley 27 appears as the farthest and oldest cluster of the studied sample.
Fil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Ahumada, Andrea Veronica. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description New CCD photometry in the Washington system C and T1 passbands down to T1 ∼ 18.5 mag in the field of the northern open cluster NGC 2236 is presented. T1 magnitudes and C − T1 colours for a total of 1162 stars within an area of 13.6 × 13.6 arcmin2 were measured. These CCD data were supplemented with photoelectric CMT1T2 photometry of 13 red giant candidates. The comparison of the cluster (T1, C − T1) colour–magnitude diagram with theoretical isochrones computed for the Washington system yields E(C − T1) = 1.10 ± 0.10 and T1 − MT1 = 13.45 ± 0.25 for log t = 8.80 (t = 600+100 −40 Myr) and Z = 0.008. The derived E(C − T1) value implies E(B − V) = 0.55 ± 0.05. NGC 2236 is then located at 2.5 ± 0.5 kpc from the Sun beyond the Perseus spiral arm and at ∼10.8 kpc from the Galactic centre. A cluster angular diameter of 9.4 arcmin, equivalent to 6.8 pc, was estimated from star counts both within and outside the cluster field. We also derived from the stellar density profile a cluster core radius of rc = 1.7 arcmin (1.2 pc) and an annular corona of rc = 1.8rc (2.2 pc). Five independent Washington abundance indices yield a mean cluster metallicity of [Fe/H] = −0.3 ± 0.2, which is not only in reasonably good agreement with the one obtained from the isochrone fit, but also compatible with the existence of a radial abundance gradient in the Galactic disc. We examined the properties of a sample of 20 known open clusters aligned along the lineof-sight to NGC 2236. Berkeley 27 appears as the farthest and oldest cluster of the studied sample.
publishDate 2007
dc.date.none.fl_str_mv 2007-07
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/11336/21963
Claria Olmedo, Juan Jose; Piatti, Andres Eduardo; Parisi, Maria Celeste; Ahumada, Andrea Veronica; NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 379; 1; 7-2007; 159-168
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/21963
identifier_str_mv Claria Olmedo, Juan Jose; Piatti, Andres Eduardo; Parisi, Maria Celeste; Ahumada, Andrea Veronica; NGC2236: a moderately metal-poor open cluster of Hyades-like age located beyond the Perseus spiral arm; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 379; 1; 7-2007; 159-168
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2007.11920.x
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-lookup/doi/10.1111/j.1365-2966.2007.11920.x
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
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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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