A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a

Autores
Collado, Ana Elisa; Gamen, Roberto Claudio; Barba, Rodolfo Hector; Morrell, Nidia Irene
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Double-lined spectroscopic binary systems, containing a Wolf-Rayet and a massive O-type star, are key objects for the study of massive star evolution because these kinds of systems allow the determination of fundamental astrophysical parameters of their components. We have performed spectroscopic observations of the star WR 68a as part of a dedicated monitoring program of WR stars to discover new binary systems. We identified spectral lines of the two components of the system and disentangled the spectra. We measured the radial velocities in the separated spectra and determined the orbital solution. We discovered that WR 68a is a double-lined spectroscopic binary with an orbital period of 5.2207 days, very small or null eccentricity, and inclination ranging between 75 and 85 deg. We classified the binary components as WN6 and O5.5-6. The WN star is less massive than the O-type star with minimum masses of 15 ± 5 M⊙ and 30 ± 4 M⊙, respectively. The equivalent width of the He ii λ4686 emission line shows variations with the orbital phase, presenting a minimum when the WN star is in front of the system. The light curve constructed from available photometric data presents minima in both conjunctions of the system.
Fil: Collado, Ana Elisa. Consejo Nacional de Investigaciones Cienti­ficas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Fisicas y Naturales; Argentina
Fil: Gamen, Roberto Claudio. 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
Fil: Barba, Rodolfo Hector. Universidad de la Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Morrell, Nidia Irene. Carnegie Observatories; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Spectroscopic
Wolf-Rayet
WR 68a
fundamental parameters
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:11336/12436
Acceder
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network_name_str CONICET Digital (CONICET)
spelling A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68aCollado, Ana ElisaGamen, Roberto ClaudioBarba, Rodolfo HectorMorrell, Nidia IreneSpectroscopicWolf-RayetWR 68afundamental parametershttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Double-lined spectroscopic binary systems, containing a Wolf-Rayet and a massive O-type star, are key objects for the study of massive star evolution because these kinds of systems allow the determination of fundamental astrophysical parameters of their components. We have performed spectroscopic observations of the star WR 68a as part of a dedicated monitoring program of WR stars to discover new binary systems. We identified spectral lines of the two components of the system and disentangled the spectra. We measured the radial velocities in the separated spectra and determined the orbital solution. We discovered that WR 68a is a double-lined spectroscopic binary with an orbital period of 5.2207 days, very small or null eccentricity, and inclination ranging between 75 and 85 deg. We classified the binary components as WN6 and O5.5-6. The WN star is less massive than the O-type star with minimum masses of 15 ± 5 M⊙ and 30 ± 4 M⊙, respectively. The equivalent width of the He ii λ4686 emission line shows variations with the orbital phase, presenting a minimum when the WN star is in front of the system. The light curve constructed from available photometric data presents minima in both conjunctions of the system.Fil: Collado, Ana Elisa. Consejo Nacional de Investigaciones Cienti­ficas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Fisicas y Naturales; ArgentinaFil: Gamen, Roberto Claudio. 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; ArgentinaFil: Barba, Rodolfo Hector. Universidad de la Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Morrell, Nidia Irene. Carnegie Observatories; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaEdp Sciences2015-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/12436Collado, Ana Elisa; Gamen, Roberto Claudio; Barba, Rodolfo Hector; Morrell, Nidia Irene; A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a; Edp Sciences; Astronomy And Astrophysics; 581; 9-2015; 49-530004-6361enginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201424863info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2015/09/aa24863-14/aa24863-14.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:21:19Zoai:ri.conicet.gov.ar:11336/12436instacron: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 10:21:20.041CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a
title A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a
spellingShingle A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a
Collado, Ana Elisa
Spectroscopic
Wolf-Rayet
WR 68a
fundamental parameters
title_short A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a
title_full A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a
title_fullStr A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a
title_full_unstemmed A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a
title_sort A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a
dc.creator.none.fl_str_mv Collado, Ana Elisa
Gamen, Roberto Claudio
Barba, Rodolfo Hector
Morrell, Nidia Irene
author Collado, Ana Elisa
author_facet Collado, Ana Elisa
Gamen, Roberto Claudio
Barba, Rodolfo Hector
Morrell, Nidia Irene
author_role author
author2 Gamen, Roberto Claudio
Barba, Rodolfo Hector
Morrell, Nidia Irene
author2_role author
author
author
dc.subject.none.fl_str_mv Spectroscopic
Wolf-Rayet
WR 68a
fundamental parameters
topic Spectroscopic
Wolf-Rayet
WR 68a
fundamental parameters
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Double-lined spectroscopic binary systems, containing a Wolf-Rayet and a massive O-type star, are key objects for the study of massive star evolution because these kinds of systems allow the determination of fundamental astrophysical parameters of their components. We have performed spectroscopic observations of the star WR 68a as part of a dedicated monitoring program of WR stars to discover new binary systems. We identified spectral lines of the two components of the system and disentangled the spectra. We measured the radial velocities in the separated spectra and determined the orbital solution. We discovered that WR 68a is a double-lined spectroscopic binary with an orbital period of 5.2207 days, very small or null eccentricity, and inclination ranging between 75 and 85 deg. We classified the binary components as WN6 and O5.5-6. The WN star is less massive than the O-type star with minimum masses of 15 ± 5 M⊙ and 30 ± 4 M⊙, respectively. The equivalent width of the He ii λ4686 emission line shows variations with the orbital phase, presenting a minimum when the WN star is in front of the system. The light curve constructed from available photometric data presents minima in both conjunctions of the system.
Fil: Collado, Ana Elisa. Consejo Nacional de Investigaciones Cienti­ficas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Fisicas y Naturales; Argentina
Fil: Gamen, Roberto Claudio. 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
Fil: Barba, Rodolfo Hector. Universidad de la Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Morrell, Nidia Irene. Carnegie Observatories; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Double-lined spectroscopic binary systems, containing a Wolf-Rayet and a massive O-type star, are key objects for the study of massive star evolution because these kinds of systems allow the determination of fundamental astrophysical parameters of their components. We have performed spectroscopic observations of the star WR 68a as part of a dedicated monitoring program of WR stars to discover new binary systems. We identified spectral lines of the two components of the system and disentangled the spectra. We measured the radial velocities in the separated spectra and determined the orbital solution. We discovered that WR 68a is a double-lined spectroscopic binary with an orbital period of 5.2207 days, very small or null eccentricity, and inclination ranging between 75 and 85 deg. We classified the binary components as WN6 and O5.5-6. The WN star is less massive than the O-type star with minimum masses of 15 ± 5 M⊙ and 30 ± 4 M⊙, respectively. The equivalent width of the He ii λ4686 emission line shows variations with the orbital phase, presenting a minimum when the WN star is in front of the system. The light curve constructed from available photometric data presents minima in both conjunctions of the system.
publishDate 2015
dc.date.none.fl_str_mv 2015-09
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/11336/12436
Collado, Ana Elisa; Gamen, Roberto Claudio; Barba, Rodolfo Hector; Morrell, Nidia Irene; A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a; Edp Sciences; Astronomy And Astrophysics; 581; 9-2015; 49-53
0004-6361
url http://hdl.handle.net/11336/12436
identifier_str_mv Collado, Ana Elisa; Gamen, Roberto Claudio; Barba, Rodolfo Hector; Morrell, Nidia Irene; A new massive double-lined spectroscopic binary system: The Wolf-Rayet star WR68a; Edp Sciences; Astronomy And Astrophysics; 581; 9-2015; 49-53
0004-6361
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201424863
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2015/09/aa24863-14/aa24863-14.html
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
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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score 13.070432

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