NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration

Autores
Piatti, Andres Eduardo; Claria Olmedo, Juan Jose; Ahumada, Andrea Veronica
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We have obtained CCD photometry down to for the open cluster NGC 2309 and its surrounding field. Twenty three probable cluster members have been identified for the first time on the basis of sound photometric criteria. Because NGC 2309 is a relatively poor cluster projected onto a rich star field showing density fluctuations, the frequently used membership criteria based on stellar density profiles or proper motion measurements would not be enough to assess the star membership status if employed independently. We estimated a cluster radius of 7.9´ and a radius at half the maximum of the cluster density profile of 1.7´. Based on the best fits of isochrones computed by the Geneva group to the cluster color-magnitude and color-color diagrams, previously shifted by the cluster reddening (E(B-V)=0.32) and distance (d=2.5 kpc), we derived the cluster age (250 Myr) and metallicity ([Fe/H]=0.0). If an 8.5 kpc distance from the Sun to the center of the Galaxy is assumed, then NGC 2309 is found to be located just in front of the Perseus spiral arm.
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: Claria Olmedo, Juan Jose. 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
Open Clusters
Ngc2309
Photometry
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:11336/20262
Acceder
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network_name_str CONICET Digital (CONICET)
spelling NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar ConcentrationPiatti, Andres EduardoClaria Olmedo, Juan JoseAhumada, Andrea VeronicaOpen ClustersNgc2309Photometryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We have obtained CCD photometry down to for the open cluster NGC 2309 and its surrounding field. Twenty three probable cluster members have been identified for the first time on the basis of sound photometric criteria. Because NGC 2309 is a relatively poor cluster projected onto a rich star field showing density fluctuations, the frequently used membership criteria based on stellar density profiles or proper motion measurements would not be enough to assess the star membership status if employed independently. We estimated a cluster radius of 7.9´ and a radius at half the maximum of the cluster density profile of 1.7´. Based on the best fits of isochrones computed by the Geneva group to the cluster color-magnitude and color-color diagrams, previously shifted by the cluster reddening (E(B-V)=0.32) and distance (d=2.5 kpc), we derived the cluster age (250 Myr) and metallicity ([Fe/H]=0.0). If an 8.5 kpc distance from the Sun to the center of the Galaxy is assumed, then NGC 2309 is found to be located just in front of the Perseus spiral arm.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; ArgentinaFil: Claria Olmedo, Juan Jose. 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; ArgentinaUniversity of Chicago Press2010-03info: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/11336/20262Piatti, Andres Eduardo; Claria Olmedo, Juan Jose; Ahumada, Andrea Veronica; NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration; University of Chicago Press; Publications of the Astronomical Society of the Pacific; 122; 889; 3-2010; 288-2980004-6280CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/651086info:eu-repo/semantics/altIdentifier/doi/10.1086/651086info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:09:52Zoai:ri.conicet.gov.ar:11336/20262instacron: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 12:09:53.264CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration
title NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration
spellingShingle NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration
Piatti, Andres Eduardo
Open Clusters
Ngc2309
Photometry
title_short NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration
title_full NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration
title_fullStr NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration
title_full_unstemmed NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration
title_sort NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration
dc.creator.none.fl_str_mv Piatti, Andres Eduardo
Claria Olmedo, Juan Jose
Ahumada, Andrea Veronica
author Piatti, Andres Eduardo
author_facet Piatti, Andres Eduardo
Claria Olmedo, Juan Jose
Ahumada, Andrea Veronica
author_role author
author2 Claria Olmedo, Juan Jose
Ahumada, Andrea Veronica
author2_role author
author
dc.subject.none.fl_str_mv Open Clusters
Ngc2309
Photometry
topic Open Clusters
Ngc2309
Photometry
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We have obtained CCD photometry down to for the open cluster NGC 2309 and its surrounding field. Twenty three probable cluster members have been identified for the first time on the basis of sound photometric criteria. Because NGC 2309 is a relatively poor cluster projected onto a rich star field showing density fluctuations, the frequently used membership criteria based on stellar density profiles or proper motion measurements would not be enough to assess the star membership status if employed independently. We estimated a cluster radius of 7.9´ and a radius at half the maximum of the cluster density profile of 1.7´. Based on the best fits of isochrones computed by the Geneva group to the cluster color-magnitude and color-color diagrams, previously shifted by the cluster reddening (E(B-V)=0.32) and distance (d=2.5 kpc), we derived the cluster age (250 Myr) and metallicity ([Fe/H]=0.0). If an 8.5 kpc distance from the Sun to the center of the Galaxy is assumed, then NGC 2309 is found to be located just in front of the Perseus spiral arm.
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: Claria Olmedo, Juan Jose. 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 We have obtained CCD photometry down to for the open cluster NGC 2309 and its surrounding field. Twenty three probable cluster members have been identified for the first time on the basis of sound photometric criteria. Because NGC 2309 is a relatively poor cluster projected onto a rich star field showing density fluctuations, the frequently used membership criteria based on stellar density profiles or proper motion measurements would not be enough to assess the star membership status if employed independently. We estimated a cluster radius of 7.9´ and a radius at half the maximum of the cluster density profile of 1.7´. Based on the best fits of isochrones computed by the Geneva group to the cluster color-magnitude and color-color diagrams, previously shifted by the cluster reddening (E(B-V)=0.32) and distance (d=2.5 kpc), we derived the cluster age (250 Myr) and metallicity ([Fe/H]=0.0). If an 8.5 kpc distance from the Sun to the center of the Galaxy is assumed, then NGC 2309 is found to be located just in front of the Perseus spiral arm.
publishDate 2010
dc.date.none.fl_str_mv 2010-03
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/11336/20262
Piatti, Andres Eduardo; Claria Olmedo, Juan Jose; Ahumada, Andrea Veronica; NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration; University of Chicago Press; Publications of the Astronomical Society of the Pacific; 122; 889; 3-2010; 288-298
0004-6280
CONICET Digital
CONICET
url http://hdl.handle.net/11336/20262
identifier_str_mv Piatti, Andres Eduardo; Claria Olmedo, Juan Jose; Ahumada, Andrea Veronica; NGC 2309: A Relatively Young Open Cluster Projected onto a Random Stellar Concentration; University of Chicago Press; Publications of the Astronomical Society of the Pacific; 122; 889; 3-2010; 288-298
0004-6280
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1086/651086
info:eu-repo/semantics/altIdentifier/doi/10.1086/651086
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 University of Chicago Press
publisher.none.fl_str_mv University of Chicago 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 12.982451

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