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

Autores
Baume, Gustavo Luis; Rodríguez, María Jimena; Corti, Mariela Alejandra; Carraro, G.; Panei, Jorge Alejandro
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We employed the ESO Max Planck Institute (MPI) wide-field camera (Baade et al.) and obtained deep images in the VIC pass-bands in the region of the IC 2944/2948 complex (l ~ 294.°8; b ~ -1.°6), 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 towards 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 G{cyrillic} from -0.94 to -1.02 (eG{cyrillic} = 0.3) in a scale where the classical Salpeter law is -1.35. We estimated the total mass of bothmain stellar groups in ~ 1100 and ~ 500M⊙, 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.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
Galaxy: structure
Open clusters and associations: general
Open clusters and associations: individual: IC 2944
Stars: early-type
Stars: formation
Stars: pre-main-sequence
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/85266
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/85266
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling A deep and wide-field view at the IC 2944/2948 complex in CentaurusBaume, Gustavo LuisRodríguez, María JimenaCorti, Mariela AlejandraCarraro, G.Panei, Jorge AlejandroCiencias AstronómicasGalaxy: structureOpen clusters and associations: generalOpen clusters and associations: individual: IC 2944Stars: early-typeStars: formationStars: pre-main-sequenceWe employed the ESO Max Planck Institute (MPI) wide-field camera (Baade et al.) and obtained deep images in the VIC pass-bands in the region of the IC 2944/2948 complex (l ~ 294.°8; b ~ -1.°6), 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 towards 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 G{cyrillic} from -0.94 to -1.02 (eG{cyrillic} = 0.3) in a scale where the classical Salpeter law is -1.35. We estimated the total mass of bothmain stellar groups in ~ 1100 and ~ 500M⊙, 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.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf411-422http://sedici.unlp.edu.ar/handle/10915/85266enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu1108info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:57:13Zoai:sedici.unlp.edu.ar:10915/85266Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:57:13.817SEDICI (UNLP) - Universidad Nacional de La Platafalse
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
Ciencias Astronómicas
Galaxy: structure
Open clusters and associations: general
Open clusters and associations: individual: IC 2944
Stars: early-type
Stars: formation
Stars: pre-main-sequence
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
Rodríguez, María Jimena
Corti, Mariela Alejandra
Carraro, G.
Panei, Jorge Alejandro
author Baume, Gustavo Luis
author_facet Baume, Gustavo Luis
Rodríguez, María Jimena
Corti, Mariela Alejandra
Carraro, G.
Panei, Jorge Alejandro
author_role author
author2 Rodríguez, María Jimena
Corti, Mariela Alejandra
Carraro, G.
Panei, Jorge Alejandro
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Galaxy: structure
Open clusters and associations: general
Open clusters and associations: individual: IC 2944
Stars: early-type
Stars: formation
Stars: pre-main-sequence
topic Ciencias Astronómicas
Galaxy: structure
Open clusters and associations: general
Open clusters and associations: individual: IC 2944
Stars: early-type
Stars: formation
Stars: pre-main-sequence
dc.description.none.fl_txt_mv We employed the ESO Max Planck Institute (MPI) wide-field camera (Baade et al.) and obtained deep images in the VIC pass-bands in the region of the IC 2944/2948 complex (l ~ 294.°8; b ~ -1.°6), 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 towards 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 G{cyrillic} from -0.94 to -1.02 (eG{cyrillic} = 0.3) in a scale where the classical Salpeter law is -1.35. We estimated the total mass of bothmain stellar groups in ~ 1100 and ~ 500M⊙, 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.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description We employed the ESO Max Planck Institute (MPI) wide-field camera (Baade et al.) and obtained deep images in the VIC pass-bands in the region of the IC 2944/2948 complex (l ~ 294.°8; b ~ -1.°6), 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 towards 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 G{cyrillic} from -0.94 to -1.02 (eG{cyrillic} = 0.3) in a scale where the classical Salpeter law is -1.35. We estimated the total mass of bothmain stellar groups in ~ 1100 and ~ 500M⊙, 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
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/85266
url http://sedici.unlp.edu.ar/handle/10915/85266
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0035-8711
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu1108
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
411-422
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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