The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)

Context. Since the discovery, with the EINSTEIN satellite, of strong X-ray emission associated with HD 93162 (≡WR 25), this object has been predicted to be a colliding-wind binary system. However, radial-velocity variations that would prove the suspected binary nature have yet to be found. Aims. We...

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Autores: Gamen, Roberto Claudio, Gosset, E., Morrell, Nidia Irene, Niemelä, Virpi Sinikka, Sana, H., Nazé, Y., Rauw, G., Barbá, Rodolfo Héctor, Solivella, Gladys Rebeca
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2006
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/83059
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83059
Access Level:acceso abierto
Palabra clave:Ciencias Astronómicas
Stars: binaries: spectroscopic
Stars: individual: HD 93162
Stars: Wolf-Rayet
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spelling The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)Gamen, Roberto ClaudioGosset, E.Morrell, Nidia IreneNiemelä, Virpi SinikkaSana, H.Nazé, Y.Rauw, G.Barbá, Rodolfo HéctorSolivella, Gladys RebecaCiencias AstronómicasStars: binaries: spectroscopicStars: individual: HD 93162Stars: Wolf-RayetContext. Since the discovery, with the EINSTEIN satellite, of strong X-ray emission associated with HD 93162 (≡WR 25), this object has been predicted to be a colliding-wind binary system. However, radial-velocity variations that would prove the suspected binary nature have yet to be found. Aims. We spectroscopically monitored this object to investigate its possible variability to address this discordance. Methods. We compiled the largest available radial-velocity data set for this star to look for variations that might be due to binary motion. We derived radial velocities from spectroscopic data acquired mainly between 1994 and 2006, and searched these radial velocities for periodicities using different numerical methods. Results. For the first time, periodic radial-velocity variations are detected. Our analysis definitively shows that the Wolf-Rayet star WR 25 is an eccentric binary system with a probable period of about 208 days.Facultad de Ciencias Astronómicas y Geofísicas2006-09-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf777-782http://sedici.unlp.edu.ar/handle/10915/83059enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20065618info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T12:53:45Zoai:sedici.unlp.edu.ar:10915/83059Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 12:53:45.377SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)
title The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)
spellingShingle The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)
Gamen, Roberto Claudio
Ciencias Astronómicas
Stars: binaries: spectroscopic
Stars: individual: HD 93162
Stars: Wolf-Rayet
title_short The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)
title_full The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)
title_fullStr The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)
title_full_unstemmed The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)
title_sort The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)
dc.creator.none.fl_str_mv Gamen, Roberto Claudio
Gosset, E.
Morrell, Nidia Irene
Niemelä, Virpi Sinikka
Sana, H.
Nazé, Y.
Rauw, G.
Barbá, Rodolfo Héctor
Solivella, Gladys Rebeca
author Gamen, Roberto Claudio
author_facet Gamen, Roberto Claudio
Gosset, E.
Morrell, Nidia Irene
Niemelä, Virpi Sinikka
Sana, H.
Nazé, Y.
Rauw, G.
Barbá, Rodolfo Héctor
Solivella, Gladys Rebeca
author_role author
author2 Gosset, E.
Morrell, Nidia Irene
Niemelä, Virpi Sinikka
Sana, H.
Nazé, Y.
Rauw, G.
Barbá, Rodolfo Héctor
Solivella, Gladys Rebeca
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Stars: binaries: spectroscopic
Stars: individual: HD 93162
Stars: Wolf-Rayet
topic Ciencias Astronómicas
Stars: binaries: spectroscopic
Stars: individual: HD 93162
Stars: Wolf-Rayet
description Context. Since the discovery, with the EINSTEIN satellite, of strong X-ray emission associated with HD 93162 (≡WR 25), this object has been predicted to be a colliding-wind binary system. However, radial-velocity variations that would prove the suspected binary nature have yet to be found. Aims. We spectroscopically monitored this object to investigate its possible variability to address this discordance. Methods. We compiled the largest available radial-velocity data set for this star to look for variations that might be due to binary motion. We derived radial velocities from spectroscopic data acquired mainly between 1994 and 2006, and searched these radial velocities for periodicities using different numerical methods. Results. For the first time, periodic radial-velocity variations are detected. Our analysis definitively shows that the Wolf-Rayet star WR 25 is an eccentric binary system with a probable period of about 208 days.
publishDate 2006
dc.date.none.fl_str_mv 2006-09-13
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/10915/83059
url http://sedici.unlp.edu.ar/handle/10915/83059
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20065618
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
777-782
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (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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