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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/8495
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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/ |
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openAccess |
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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