A new spectroscopic analysis of the massive O + O type binary HD 54662 AB

Autores
Barba, Rodolfo Héctor; Sabín Sanjulián, C; Arias, J. I.; Gamen, Roberto Claudio; Morrell, Nidia Irene; Ferrero, G; Maíz Apellániz, Jesús; Putkuri, C.; Simón Díaz, S.; Boyajian, T. S.; Fullerton, A. W.; McSwain, M. V.
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
HD 54662 AB is one of the three O + OB binaries known so far with orbital period longer than 1000 d, offering the opportunity to test scenarios of massive star formation and models of single stellar evolution. Here, we present a detailed study of this system based on new high-resolution spectra and data. A disentangling method is used to recover the individual spectra of the primary and secondary components, which are classified as O6.5 V(n)z and O7.5 Vz, respectively. Combining radial velocity measurements and astrometric data, a new absolute orbit with a period of 2113 ± 9 d and an eccentricity of 0.062 ± 0.008 is determined, confirming previous findings. However, absolute masses of 23.8 ± 1.1 M for the primary and 20.3 ± 1.1 M for the secondary are obtained, differing from previous determinations but in reasonable agreement with the spectral types of the stars. Primary and secondary components show remarkably different projected rotational velocities (160 and 40 km s−1 , respectively), which is probably related to the formation process of the binary. Contrary to previously interpretations, the star with broader spectral features is the most massive object in the system. Stellar and wind parameters of both stars are derived through quantitative spectroscopic analysis of the disentangled spectra using FASTWIND models, and they are consistent with the current calibrations for O-type stars. Evolutionary masses and ages are also computed with the BONNSAI tool. Ages below 2.5 Ma are obtained, in agreement with the youth expected from their Vz nature.
Fil: Barba, Rodolfo Héctor. Universidad de La Serena; Chile
Fil: Sabín Sanjulián, C. Universidad de La Serena; Chile
Fil: Arias, J. I.. Universidad de La Serena; Chile
Fil: Gamen, Roberto Claudio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Morrell, Nidia Irene. Observatorio Las Campanas, Carnegie Institution; Chile
Fil: Ferrero, G. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Maíz Apellániz, Jesús. Csic-Inta. Centro de Astrobiología; España
Fil: Putkuri, C.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Simón Díaz, S.. Instituto de Astrofísica de Canarias; España
Fil: Boyajian, T. S.. Louisiana State University; Estados Unidos
Fil: Fullerton, A. W.. Space Telescope Science Institute; Estados Unidos
Fil: McSwain, M. V.. Lehigh University; Estados Unidos
Materia
stars: atmospheres
binaries: spectroscopic
stars: early-type
stars: 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:11336/139432
Acceder
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network_name_str CONICET Digital (CONICET)
spelling A new spectroscopic analysis of the massive O + O type binary HD 54662 ABBarba, Rodolfo HéctorSabín Sanjulián, CArias, J. I.Gamen, Roberto ClaudioMorrell, Nidia IreneFerrero, GMaíz Apellániz, JesúsPutkuri, C.Simón Díaz, S.Boyajian, T. S.Fullerton, A. W.McSwain, M. V.stars: atmospheresbinaries: spectroscopicstars: early-typestars: fundamental parametershttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1HD 54662 AB is one of the three O + OB binaries known so far with orbital period longer than 1000 d, offering the opportunity to test scenarios of massive star formation and models of single stellar evolution. Here, we present a detailed study of this system based on new high-resolution spectra and data. A disentangling method is used to recover the individual spectra of the primary and secondary components, which are classified as O6.5 V(n)z and O7.5 Vz, respectively. Combining radial velocity measurements and astrometric data, a new absolute orbit with a period of 2113 ± 9 d and an eccentricity of 0.062 ± 0.008 is determined, confirming previous findings. However, absolute masses of 23.8 ± 1.1 M for the primary and 20.3 ± 1.1 M for the secondary are obtained, differing from previous determinations but in reasonable agreement with the spectral types of the stars. Primary and secondary components show remarkably different projected rotational velocities (160 and 40 km s−1 , respectively), which is probably related to the formation process of the binary. Contrary to previously interpretations, the star with broader spectral features is the most massive object in the system. Stellar and wind parameters of both stars are derived through quantitative spectroscopic analysis of the disentangled spectra using FASTWIND models, and they are consistent with the current calibrations for O-type stars. Evolutionary masses and ages are also computed with the BONNSAI tool. Ages below 2.5 Ma are obtained, in agreement with the youth expected from their Vz nature.Fil: Barba, Rodolfo Héctor. Universidad de La Serena; ChileFil: Sabín Sanjulián, C. Universidad de La Serena; ChileFil: Arias, J. I.. Universidad de La Serena; ChileFil: Gamen, Roberto Claudio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Morrell, Nidia Irene. Observatorio Las Campanas, Carnegie Institution; ChileFil: Ferrero, G. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Maíz Apellániz, Jesús. Csic-Inta. Centro de Astrobiología; EspañaFil: Putkuri, C.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Simón Díaz, S.. Instituto de Astrofísica de Canarias; EspañaFil: Boyajian, T. S.. Louisiana State University; Estados UnidosFil: Fullerton, A. W.. Space Telescope Science Institute; Estados UnidosFil: McSwain, M. V.. Lehigh University; Estados UnidosWiley Blackwell Publishing, Inc2020-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/139432Barba, Rodolfo Héctor; Sabín Sanjulián, C; Arias, J. I.; Gamen, Roberto Claudio; Morrell, Nidia Irene; et al.; A new spectroscopic analysis of the massive O + O type binary HD 54662 AB; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 494; 3; 5-2020; 3937-39490035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/494/3/3937/5825374info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/staa927info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:53:21Zoai:ri.conicet.gov.ar:11336/139432instacron: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:34982025-10-22 11:53:22.116CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A new spectroscopic analysis of the massive O + O type binary HD 54662 AB
title A new spectroscopic analysis of the massive O + O type binary HD 54662 AB
spellingShingle A new spectroscopic analysis of the massive O + O type binary HD 54662 AB
Barba, Rodolfo Héctor
stars: atmospheres
binaries: spectroscopic
stars: early-type
stars: fundamental parameters
title_short A new spectroscopic analysis of the massive O + O type binary HD 54662 AB
title_full A new spectroscopic analysis of the massive O + O type binary HD 54662 AB
title_fullStr A new spectroscopic analysis of the massive O + O type binary HD 54662 AB
title_full_unstemmed A new spectroscopic analysis of the massive O + O type binary HD 54662 AB
title_sort A new spectroscopic analysis of the massive O + O type binary HD 54662 AB
dc.creator.none.fl_str_mv Barba, Rodolfo Héctor
Sabín Sanjulián, C
Arias, J. I.
Gamen, Roberto Claudio
Morrell, Nidia Irene
Ferrero, G
Maíz Apellániz, Jesús
Putkuri, C.
Simón Díaz, S.
Boyajian, T. S.
Fullerton, A. W.
McSwain, M. V.
author Barba, Rodolfo Héctor
author_facet Barba, Rodolfo Héctor
Sabín Sanjulián, C
Arias, J. I.
Gamen, Roberto Claudio
Morrell, Nidia Irene
Ferrero, G
Maíz Apellániz, Jesús
Putkuri, C.
Simón Díaz, S.
Boyajian, T. S.
Fullerton, A. W.
McSwain, M. V.
author_role author
author2 Sabín Sanjulián, C
Arias, J. I.
Gamen, Roberto Claudio
Morrell, Nidia Irene
Ferrero, G
Maíz Apellániz, Jesús
Putkuri, C.
Simón Díaz, S.
Boyajian, T. S.
Fullerton, A. W.
McSwain, M. V.
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv stars: atmospheres
binaries: spectroscopic
stars: early-type
stars: fundamental parameters
topic stars: atmospheres
binaries: spectroscopic
stars: early-type
stars: 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 HD 54662 AB is one of the three O + OB binaries known so far with orbital period longer than 1000 d, offering the opportunity to test scenarios of massive star formation and models of single stellar evolution. Here, we present a detailed study of this system based on new high-resolution spectra and data. A disentangling method is used to recover the individual spectra of the primary and secondary components, which are classified as O6.5 V(n)z and O7.5 Vz, respectively. Combining radial velocity measurements and astrometric data, a new absolute orbit with a period of 2113 ± 9 d and an eccentricity of 0.062 ± 0.008 is determined, confirming previous findings. However, absolute masses of 23.8 ± 1.1 M for the primary and 20.3 ± 1.1 M for the secondary are obtained, differing from previous determinations but in reasonable agreement with the spectral types of the stars. Primary and secondary components show remarkably different projected rotational velocities (160 and 40 km s−1 , respectively), which is probably related to the formation process of the binary. Contrary to previously interpretations, the star with broader spectral features is the most massive object in the system. Stellar and wind parameters of both stars are derived through quantitative spectroscopic analysis of the disentangled spectra using FASTWIND models, and they are consistent with the current calibrations for O-type stars. Evolutionary masses and ages are also computed with the BONNSAI tool. Ages below 2.5 Ma are obtained, in agreement with the youth expected from their Vz nature.
Fil: Barba, Rodolfo Héctor. Universidad de La Serena; Chile
Fil: Sabín Sanjulián, C. Universidad de La Serena; Chile
Fil: Arias, J. I.. Universidad de La Serena; Chile
Fil: Gamen, Roberto Claudio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Morrell, Nidia Irene. Observatorio Las Campanas, Carnegie Institution; Chile
Fil: Ferrero, G. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Maíz Apellániz, Jesús. Csic-Inta. Centro de Astrobiología; España
Fil: Putkuri, C.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Simón Díaz, S.. Instituto de Astrofísica de Canarias; España
Fil: Boyajian, T. S.. Louisiana State University; Estados Unidos
Fil: Fullerton, A. W.. Space Telescope Science Institute; Estados Unidos
Fil: McSwain, M. V.. Lehigh University; Estados Unidos
description HD 54662 AB is one of the three O + OB binaries known so far with orbital period longer than 1000 d, offering the opportunity to test scenarios of massive star formation and models of single stellar evolution. Here, we present a detailed study of this system based on new high-resolution spectra and data. A disentangling method is used to recover the individual spectra of the primary and secondary components, which are classified as O6.5 V(n)z and O7.5 Vz, respectively. Combining radial velocity measurements and astrometric data, a new absolute orbit with a period of 2113 ± 9 d and an eccentricity of 0.062 ± 0.008 is determined, confirming previous findings. However, absolute masses of 23.8 ± 1.1 M for the primary and 20.3 ± 1.1 M for the secondary are obtained, differing from previous determinations but in reasonable agreement with the spectral types of the stars. Primary and secondary components show remarkably different projected rotational velocities (160 and 40 km s−1 , respectively), which is probably related to the formation process of the binary. Contrary to previously interpretations, the star with broader spectral features is the most massive object in the system. Stellar and wind parameters of both stars are derived through quantitative spectroscopic analysis of the disentangled spectra using FASTWIND models, and they are consistent with the current calibrations for O-type stars. Evolutionary masses and ages are also computed with the BONNSAI tool. Ages below 2.5 Ma are obtained, in agreement with the youth expected from their Vz nature.
publishDate 2020
dc.date.none.fl_str_mv 2020-05
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/11336/139432
Barba, Rodolfo Héctor; Sabín Sanjulián, C; Arias, J. I.; Gamen, Roberto Claudio; Morrell, Nidia Irene; et al.; A new spectroscopic analysis of the massive O + O type binary HD 54662 AB; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 494; 3; 5-2020; 3937-3949
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/139432
identifier_str_mv Barba, Rodolfo Héctor; Sabín Sanjulián, C; Arias, J. I.; Gamen, Roberto Claudio; Morrell, Nidia Irene; et al.; A new spectroscopic analysis of the massive O + O type binary HD 54662 AB; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 494; 3; 5-2020; 3937-3949
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/494/3/3937/5825374
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/staa927
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 Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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 12.982451

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