Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies

Autores
Corti, Mariela Alejandra; Orellana, Rosa Beatriz
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. An OB association is a gravitationally unbound group of stars. The identification of the members of the association is an important aspect of its study. There are few astrometric membership studies for OB associations, but the combination of these studies with astrophysical techniques becomes a very powerful tool for this type of research. Aims. To perform new spectroscopic and astrometric studies of the members of the association Centaurus OB1 (Cen OB1) and the open cluster NGC 4755. Methods. To carry out this study we used new spectroscopic optical observations obtained at CASLEO, and proper motion and photometric data from the Tycho−2 Catalogue and other databases available via the Internet. Results. With this investigation we found 52 members of Cen OB1 (l = 303.◦ 7, b = 0.◦ 4) and four members of NGC 4755(l = 303.◦2, b = 2.◦5), an open cluster integrated into the Cen OB1 stellar association. The distance, heliocentric radial velocity, proper motion, and age of Cen OB1 are 2.6 ± 0.5 kpc, ∼ −20 km s−1 , µαcosδ = −4.78 ± 0.10 mas yr−1, µδ = −0.93 ± 0.10 mas yr−1, and ∼ 20 × 106 years old, respectively. The same parameters found for NGC 4755 are 1.9 ±0.5 kpc, −18 ± 2 km s−1, µαcosδ = −4.14 ± 0.19 mas yr−1, µδ = −1.09 ± 0.12 mas yr−1 , and ∼ 15 × 106 years old. The pulsars PSR J1253−5820 and PSR J1254−6150 could have been born as the result of supernovae explosions that occurred in the past by massive members of Cen OB1. We have seen Infrared Astronomical satellite (IRAS) sources near Cen OB1, that show that star formation is still occurring. The age gradient observed between the different members of Cen OB1 makes it likely that the stellar association and IRAS sources represent different stages of a sequential formation process.
Fil: Corti, Mariela Alejandra. 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); Argentina
Fil: Orellana, Rosa Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
Materia
Proper motions
Open clusters and associations
NGC 4755 (galaxia)
Early type stars
Centaurus OB1
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:11336/8495

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network_name_str CONICET Digital (CONICET)
spelling Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studiesCorti, Mariela AlejandraOrellana, Rosa BeatrizProper motionsOpen clusters and associationsNGC 4755 (galaxia)Early type starsCentaurus OB1https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. An OB association is a gravitationally unbound group of stars. The identification of the members of the association is an important aspect of its study. There are few astrometric membership studies for OB associations, but the combination of these studies with astrophysical techniques becomes a very powerful tool for this type of research. Aims. To perform new spectroscopic and astrometric studies of the members of the association Centaurus OB1 (Cen OB1) and the open cluster NGC 4755. Methods. To carry out this study we used new spectroscopic optical observations obtained at CASLEO, and proper motion and photometric data from the Tycho−2 Catalogue and other databases available via the Internet. Results. With this investigation we found 52 members of Cen OB1 (l = 303.◦ 7, b = 0.◦ 4) and four members of NGC 4755(l = 303.◦2, b = 2.◦5), an open cluster integrated into the Cen OB1 stellar association. The distance, heliocentric radial velocity, proper motion, and age of Cen OB1 are 2.6 ± 0.5 kpc, ∼ −20 km s−1 , µαcosδ = −4.78 ± 0.10 mas yr−1, µδ = −0.93 ± 0.10 mas yr−1, and ∼ 20 × 106 years old, respectively. The same parameters found for NGC 4755 are 1.9 ±0.5 kpc, −18 ± 2 km s−1, µαcosδ = −4.14 ± 0.19 mas yr−1, µδ = −1.09 ± 0.12 mas yr−1 , and ∼ 15 × 106 years old. The pulsars PSR J1253−5820 and PSR J1254−6150 could have been born as the result of supernovae explosions that occurred in the past by massive members of Cen OB1. We have seen Infrared Astronomical satellite (IRAS) sources near Cen OB1, that show that star formation is still occurring. The age gradient observed between the different members of Cen OB1 makes it likely that the stellar association and IRAS sources represent different stages of a sequential formation process.Fil: Corti, Mariela Alejandra. 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); ArgentinaFil: Orellana, Rosa Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; ArgentinaEdp Sciences2013-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/8495Corti, Mariela Alejandra; Orellana, Rosa Beatriz; Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies; Edp Sciences; Astronomy And Astrophysics; 553; 5-2013; 108-1200004-6361enginfo:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2013/05/aa20743-12/aa20743-12.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201220743info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:45:20Zoai:ri.conicet.gov.ar:11336/8495instacron: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 10:45:21.272CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies
title Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies
spellingShingle Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies
Corti, Mariela Alejandra
Proper motions
Open clusters and associations
NGC 4755 (galaxia)
Early type stars
Centaurus OB1
title_short Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies
title_full Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies
title_fullStr Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies
title_full_unstemmed Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies
title_sort Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies
dc.creator.none.fl_str_mv Corti, Mariela Alejandra
Orellana, Rosa Beatriz
author Corti, Mariela Alejandra
author_facet Corti, Mariela Alejandra
Orellana, Rosa Beatriz
author_role author
author2 Orellana, Rosa Beatriz
author2_role author
dc.subject.none.fl_str_mv Proper motions
Open clusters and associations
NGC 4755 (galaxia)
Early type stars
Centaurus OB1
topic Proper motions
Open clusters and associations
NGC 4755 (galaxia)
Early type stars
Centaurus OB1
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. An OB association is a gravitationally unbound group of stars. The identification of the members of the association is an important aspect of its study. There are few astrometric membership studies for OB associations, but the combination of these studies with astrophysical techniques becomes a very powerful tool for this type of research. Aims. To perform new spectroscopic and astrometric studies of the members of the association Centaurus OB1 (Cen OB1) and the open cluster NGC 4755. Methods. To carry out this study we used new spectroscopic optical observations obtained at CASLEO, and proper motion and photometric data from the Tycho−2 Catalogue and other databases available via the Internet. Results. With this investigation we found 52 members of Cen OB1 (l = 303.◦ 7, b = 0.◦ 4) and four members of NGC 4755(l = 303.◦2, b = 2.◦5), an open cluster integrated into the Cen OB1 stellar association. The distance, heliocentric radial velocity, proper motion, and age of Cen OB1 are 2.6 ± 0.5 kpc, ∼ −20 km s−1 , µαcosδ = −4.78 ± 0.10 mas yr−1, µδ = −0.93 ± 0.10 mas yr−1, and ∼ 20 × 106 years old, respectively. The same parameters found for NGC 4755 are 1.9 ±0.5 kpc, −18 ± 2 km s−1, µαcosδ = −4.14 ± 0.19 mas yr−1, µδ = −1.09 ± 0.12 mas yr−1 , and ∼ 15 × 106 years old. The pulsars PSR J1253−5820 and PSR J1254−6150 could have been born as the result of supernovae explosions that occurred in the past by massive members of Cen OB1. We have seen Infrared Astronomical satellite (IRAS) sources near Cen OB1, that show that star formation is still occurring. The age gradient observed between the different members of Cen OB1 makes it likely that the stellar association and IRAS sources represent different stages of a sequential formation process.
Fil: Corti, Mariela Alejandra. 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. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); Argentina
Fil: Orellana, Rosa Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
description Context. An OB association is a gravitationally unbound group of stars. The identification of the members of the association is an important aspect of its study. There are few astrometric membership studies for OB associations, but the combination of these studies with astrophysical techniques becomes a very powerful tool for this type of research. Aims. To perform new spectroscopic and astrometric studies of the members of the association Centaurus OB1 (Cen OB1) and the open cluster NGC 4755. Methods. To carry out this study we used new spectroscopic optical observations obtained at CASLEO, and proper motion and photometric data from the Tycho−2 Catalogue and other databases available via the Internet. Results. With this investigation we found 52 members of Cen OB1 (l = 303.◦ 7, b = 0.◦ 4) and four members of NGC 4755(l = 303.◦2, b = 2.◦5), an open cluster integrated into the Cen OB1 stellar association. The distance, heliocentric radial velocity, proper motion, and age of Cen OB1 are 2.6 ± 0.5 kpc, ∼ −20 km s−1 , µαcosδ = −4.78 ± 0.10 mas yr−1, µδ = −0.93 ± 0.10 mas yr−1, and ∼ 20 × 106 years old, respectively. The same parameters found for NGC 4755 are 1.9 ±0.5 kpc, −18 ± 2 km s−1, µαcosδ = −4.14 ± 0.19 mas yr−1, µδ = −1.09 ± 0.12 mas yr−1 , and ∼ 15 × 106 years old. The pulsars PSR J1253−5820 and PSR J1254−6150 could have been born as the result of supernovae explosions that occurred in the past by massive members of Cen OB1. We have seen Infrared Astronomical satellite (IRAS) sources near Cen OB1, that show that star formation is still occurring. The age gradient observed between the different members of Cen OB1 makes it likely that the stellar association and IRAS sources represent different stages of a sequential formation process.
publishDate 2013
dc.date.none.fl_str_mv 2013-05
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/11336/8495
Corti, Mariela Alejandra; Orellana, Rosa Beatriz; Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies; Edp Sciences; Astronomy And Astrophysics; 553; 5-2013; 108-120
0004-6361
url http://hdl.handle.net/11336/8495
identifier_str_mv Corti, Mariela Alejandra; Orellana, Rosa Beatriz; Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies; Edp Sciences; Astronomy And Astrophysics; 553; 5-2013; 108-120
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/2013/05/aa20743-12/aa20743-12.html
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201220743
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
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dc.format.none.fl_str_mv application/pdf
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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
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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