A deep and wide-field view at the IC 2944/2948 complex in Centaurus

Autores
Baume, Gustavo Luis; Rodriguez, Maria Jimena; Corti, Mariela Alejandra; Carraro, Giovanni; Panei, Jorge Alejandro
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We employed the ESO MPI wide-field camera and obtained deep images in the VIC passbands in the region of the IC 2944/2948 complex (l∼294.º 8; b∼−1.6º), and complemented them with literature and archival data. We used this material to derive the photometric, spectroscopic and kinematic properties of the brightest (V < 16) stars in the region. The VI deep photometry on the other end, helped us to unravel the lower main sequence of a few, possibly physical, star groups in the area. Our analysis confirmed previous suggestions that the extinction toward this line of sight follows the normal law (RV=3.1). We could recognize B-type stars spread in distance from a few hundred pc to at least 2 kpc. We found two young groups (age∼3 Myr) located respectively at about 2.3 and 3.2 kpc from the Sun. They are characterized by a significant variable extinction (E(B−V) ranging from 0.28 to 0.45 mag), and host a significant pre-main sequence population. We computed the initial mass functions for these groups and obtained slopes Gamma from -0.94 to -1.02 (e_Gamma=0.3), in a scale where the classical Salpeter law is -1.35. We estimated the total mass of both main stellar groups in ∼1100 and ∼500 M_sun, respectively. Our kinematic analysis indicated that both groups of stars deviate from the standard rotation curve of the Milky Way, in line with literature results for this specific Galactic direction. Finally, along the same line of sight we identified a third group of early-type stars located at ∼8 kpc from the Sun. This group might be located in the far side of the Sagittarius-Carina spiral arm.
Fil: Baume, Gustavo Luis. 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: Rodriguez, Maria Jimena. 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: Corti, Mariela Alejandra. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Carraro, Giovanni. European Southern Observatory; Chile
Fil: Panei, Jorge Alejandro. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. 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
IC 2944 (astronomía)
Galactic Structure
Early type stars
IC 2948 (astronomía)
Centaurus
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:11336/23683
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/23683
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A deep and wide-field view at the IC 2944/2948 complex in CentaurusBaume, Gustavo LuisRodriguez, Maria JimenaCorti, Mariela AlejandraCarraro, GiovanniPanei, Jorge AlejandroOpen clusters and associationsIC 2944 (astronomía)Galactic StructureEarly type starsIC 2948 (astronomía)Centaurushttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We employed the ESO MPI wide-field camera and obtained deep images in the VIC passbands in the region of the IC 2944/2948 complex (l∼294.º 8; b∼−1.6º), and complemented them with literature and archival data. We used this material to derive the photometric, spectroscopic and kinematic properties of the brightest (V < 16) stars in the region. The VI deep photometry on the other end, helped us to unravel the lower main sequence of a few, possibly physical, star groups in the area. Our analysis confirmed previous suggestions that the extinction toward this line of sight follows the normal law (RV=3.1). We could recognize B-type stars spread in distance from a few hundred pc to at least 2 kpc. We found two young groups (age∼3 Myr) located respectively at about 2.3 and 3.2 kpc from the Sun. They are characterized by a significant variable extinction (E(B−V) ranging from 0.28 to 0.45 mag), and host a significant pre-main sequence population. We computed the initial mass functions for these groups and obtained slopes Gamma from -0.94 to -1.02 (e_Gamma=0.3), in a scale where the classical Salpeter law is -1.35. We estimated the total mass of both main stellar groups in ∼1100 and ∼500 M_sun, respectively. Our kinematic analysis indicated that both groups of stars deviate from the standard rotation curve of the Milky Way, in line with literature results for this specific Galactic direction. Finally, along the same line of sight we identified a third group of early-type stars located at ∼8 kpc from the Sun. This group might be located in the far side of the Sagittarius-Carina spiral arm.Fil: Baume, Gustavo Luis. 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: Rodriguez, Maria Jimena. 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: Corti, Mariela Alejandra. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Carraro, Giovanni. European Southern Observatory; ChileFil: Panei, Jorge Alejandro. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. 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; ArgentinaOxford University Press2014-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/23683Baume, Gustavo Luis; Rodriguez, Maria Jimena; Corti, Mariela Alejandra; Carraro, Giovanni; Panei, Jorge Alejandro; A deep and wide-field view at the IC 2944/2948 complex in Centaurus; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 443; 9-2014; 411-4220035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu1108info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stu1108info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:18:56Zoai:ri.conicet.gov.ar:11336/23683instacron: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 11:18:56.303CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A deep and wide-field view at the IC 2944/2948 complex in Centaurus
title A deep and wide-field view at the IC 2944/2948 complex in Centaurus
spellingShingle A deep and wide-field view at the IC 2944/2948 complex in Centaurus
Baume, Gustavo Luis
Open clusters and associations
IC 2944 (astronomía)
Galactic Structure
Early type stars
IC 2948 (astronomía)
Centaurus
title_short A deep and wide-field view at the IC 2944/2948 complex in Centaurus
title_full A deep and wide-field view at the IC 2944/2948 complex in Centaurus
title_fullStr A deep and wide-field view at the IC 2944/2948 complex in Centaurus
title_full_unstemmed A deep and wide-field view at the IC 2944/2948 complex in Centaurus
title_sort A deep and wide-field view at the IC 2944/2948 complex in Centaurus
dc.creator.none.fl_str_mv Baume, Gustavo Luis
Rodriguez, Maria Jimena
Corti, Mariela Alejandra
Carraro, Giovanni
Panei, Jorge Alejandro
author Baume, Gustavo Luis
author_facet Baume, Gustavo Luis
Rodriguez, Maria Jimena
Corti, Mariela Alejandra
Carraro, Giovanni
Panei, Jorge Alejandro
author_role author
author2 Rodriguez, Maria Jimena
Corti, Mariela Alejandra
Carraro, Giovanni
Panei, Jorge Alejandro
author2_role author
author
author
author
dc.subject.none.fl_str_mv Open clusters and associations
IC 2944 (astronomía)
Galactic Structure
Early type stars
IC 2948 (astronomía)
Centaurus
topic Open clusters and associations
IC 2944 (astronomía)
Galactic Structure
Early type stars
IC 2948 (astronomía)
Centaurus
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 employed the ESO MPI wide-field camera and obtained deep images in the VIC passbands in the region of the IC 2944/2948 complex (l∼294.º 8; b∼−1.6º), and complemented them with literature and archival data. We used this material to derive the photometric, spectroscopic and kinematic properties of the brightest (V < 16) stars in the region. The VI deep photometry on the other end, helped us to unravel the lower main sequence of a few, possibly physical, star groups in the area. Our analysis confirmed previous suggestions that the extinction toward this line of sight follows the normal law (RV=3.1). We could recognize B-type stars spread in distance from a few hundred pc to at least 2 kpc. We found two young groups (age∼3 Myr) located respectively at about 2.3 and 3.2 kpc from the Sun. They are characterized by a significant variable extinction (E(B−V) ranging from 0.28 to 0.45 mag), and host a significant pre-main sequence population. We computed the initial mass functions for these groups and obtained slopes Gamma from -0.94 to -1.02 (e_Gamma=0.3), in a scale where the classical Salpeter law is -1.35. We estimated the total mass of both main stellar groups in ∼1100 and ∼500 M_sun, respectively. Our kinematic analysis indicated that both groups of stars deviate from the standard rotation curve of the Milky Way, in line with literature results for this specific Galactic direction. Finally, along the same line of sight we identified a third group of early-type stars located at ∼8 kpc from the Sun. This group might be located in the far side of the Sagittarius-Carina spiral arm.
Fil: Baume, Gustavo Luis. 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: Rodriguez, Maria Jimena. 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: Corti, Mariela Alejandra. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Carraro, Giovanni. European Southern Observatory; Chile
Fil: Panei, Jorge Alejandro. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. 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 We employed the ESO MPI wide-field camera and obtained deep images in the VIC passbands in the region of the IC 2944/2948 complex (l∼294.º 8; b∼−1.6º), and complemented them with literature and archival data. We used this material to derive the photometric, spectroscopic and kinematic properties of the brightest (V < 16) stars in the region. The VI deep photometry on the other end, helped us to unravel the lower main sequence of a few, possibly physical, star groups in the area. Our analysis confirmed previous suggestions that the extinction toward this line of sight follows the normal law (RV=3.1). We could recognize B-type stars spread in distance from a few hundred pc to at least 2 kpc. We found two young groups (age∼3 Myr) located respectively at about 2.3 and 3.2 kpc from the Sun. They are characterized by a significant variable extinction (E(B−V) ranging from 0.28 to 0.45 mag), and host a significant pre-main sequence population. We computed the initial mass functions for these groups and obtained slopes Gamma from -0.94 to -1.02 (e_Gamma=0.3), in a scale where the classical Salpeter law is -1.35. We estimated the total mass of both main stellar groups in ∼1100 and ∼500 M_sun, respectively. Our kinematic analysis indicated that both groups of stars deviate from the standard rotation curve of the Milky Way, in line with literature results for this specific Galactic direction. Finally, along the same line of sight we identified a third group of early-type stars located at ∼8 kpc from the Sun. This group might be located in the far side of the Sagittarius-Carina spiral arm.
publishDate 2014
dc.date.none.fl_str_mv 2014-09
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/11336/23683
Baume, Gustavo Luis; Rodriguez, Maria Jimena; Corti, Mariela Alejandra; Carraro, Giovanni; Panei, Jorge Alejandro; A deep and wide-field view at the IC 2944/2948 complex in Centaurus; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 443; 9-2014; 411-422
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/23683
identifier_str_mv Baume, Gustavo Luis; Rodriguez, Maria Jimena; Corti, Mariela Alejandra; Carraro, Giovanni; Panei, Jorge Alejandro; A deep and wide-field view at the IC 2944/2948 complex in Centaurus; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 443; 9-2014; 411-422
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/10.1093/mnras/stu1108
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stu1108
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
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 12.982451

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