Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula

Autores
Albacete Colombo, Juan Facundo; Morrell, Nidia Irene; Niemelä, Virpi Sinikka; Corcoran, Michael
Año de publicación
2001
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Optical spectroscopy of CPD-59° 2635, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this star to be a double-lined binary system. We have obtained the first radial velocity orbit for this system, consisting of a circular solution with a period of 2.2999 d and semi-amplitudes of 208 and 273 km s−1. This results in minimum masses of 15 and 11 M? for the binary components of CPD-59° 2635, which we classified as O8V and O9.5V, although spectral type variations of the order of 1 subclass, which we identify as the Struve–Sahade effect, seem to be present in both components. From ROSAT HRI observations of CPD −59° 2635 we determine a luminosity ratio log(Lx/Lbol)≈−7, which is similar to that observed for other O-type stars in the Carina Nebula region. No evidence of light variations is present in the available optical or X-ray data sets.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
astrofísica
binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/2071
Acceder
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network_name_str SEDICI (UNLP)
spelling Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina NebulaAlbacete Colombo, Juan FacundoMorrell, Nidia IreneNiemelä, Virpi SinikkaCorcoran, MichaelCiencias Astronómicasastrofísicabinaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: starsOptical spectroscopy of CPD-59° 2635, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this star to be a double-lined binary system. We have obtained the first radial velocity orbit for this system, consisting of a circular solution with a period of 2.2999 d and semi-amplitudes of 208 and 273 km s−1. This results in minimum masses of 15 and 11 M? for the binary components of CPD-59° 2635, which we classified as O8V and O9.5V, although spectral type variations of the order of 1 subclass, which we identify as the Struve–Sahade effect, seem to be present in both components. From ROSAT HRI observations of CPD −59° 2635 we determine a luminosity ratio log(Lx/Lbol)≈−7, which is similar to that observed for other O-type stars in the Carina Nebula region. No evidence of light variations is present in the available optical or X-ray data sets.Facultad de Ciencias Astronómicas y Geofísicas2001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf78-84http://sedici.unlp.edu.ar/handle/10915/2071enginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1046/j.1365-8711.2001.04497.x/pdfinfo:eu-repo/semantics/altIdentifier/issn/1365-2966info:eu-repo/semantics/altIdentifier/doi/10.1046/j.1365-8711.2001.04497.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T10:48:37Zoai:sedici.unlp.edu.ar:10915/2071Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 10:48:38.959SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
title Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
spellingShingle Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
Albacete Colombo, Juan Facundo
Ciencias Astronómicas
astrofísica
binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars
title_short Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
title_full Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
title_fullStr Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
title_full_unstemmed Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
title_sort Optical Spectroscopy of X-Mega Targets : I. CPD -59:2635: A New Double-Lined O-Type Binary in the Carina Nebula
dc.creator.none.fl_str_mv Albacete Colombo, Juan Facundo
Morrell, Nidia Irene
Niemelä, Virpi Sinikka
Corcoran, Michael
author Albacete Colombo, Juan Facundo
author_facet Albacete Colombo, Juan Facundo
Morrell, Nidia Irene
Niemelä, Virpi Sinikka
Corcoran, Michael
author_role author
author2 Morrell, Nidia Irene
Niemelä, Virpi Sinikka
Corcoran, Michael
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
astrofísica
binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars
topic Ciencias Astronómicas
astrofísica
binaries: general; stars: early-type; stars: individual: CPD 2598 2635; open clusters and associations: individual: Trumpler 16; X-rays: stars
dc.description.none.fl_txt_mv Optical spectroscopy of CPD-59° 2635, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this star to be a double-lined binary system. We have obtained the first radial velocity orbit for this system, consisting of a circular solution with a period of 2.2999 d and semi-amplitudes of 208 and 273 km s−1. This results in minimum masses of 15 and 11 M? for the binary components of CPD-59° 2635, which we classified as O8V and O9.5V, although spectral type variations of the order of 1 subclass, which we identify as the Struve–Sahade effect, seem to be present in both components. From ROSAT HRI observations of CPD −59° 2635 we determine a luminosity ratio log(Lx/Lbol)≈−7, which is similar to that observed for other O-type stars in the Carina Nebula region. No evidence of light variations is present in the available optical or X-ray data sets.
Facultad de Ciencias Astronómicas y Geofísicas
description Optical spectroscopy of CPD-59° 2635, one of the O-type stars in the open cluster Trumpler 16 in the Carina Nebula, reveals this star to be a double-lined binary system. We have obtained the first radial velocity orbit for this system, consisting of a circular solution with a period of 2.2999 d and semi-amplitudes of 208 and 273 km s−1. This results in minimum masses of 15 and 11 M? for the binary components of CPD-59° 2635, which we classified as O8V and O9.5V, although spectral type variations of the order of 1 subclass, which we identify as the Struve–Sahade effect, seem to be present in both components. From ROSAT HRI observations of CPD −59° 2635 we determine a luminosity ratio log(Lx/Lbol)≈−7, which is similar to that observed for other O-type stars in the Carina Nebula region. No evidence of light variations is present in the available optical or X-ray data sets.
publishDate 2001
dc.date.none.fl_str_mv 2001
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/2071
url http://sedici.unlp.edu.ar/handle/10915/2071
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/issn/1365-2966
info:eu-repo/semantics/altIdentifier/doi/10.1046/j.1365-8711.2001.04497.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
dc.format.none.fl_str_mv application/pdf
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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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