A new spectroscopic analysis of the massive O + O type binary HD 54662 AB
- Autores
- Barbá, Rodolfo Héctor; Sabín Sanjulián, C.; Arias, Julia Inés; Gamen, Roberto Claudio; Morrell, Nidia Irene; Ferrero Sosa, Gabriel Antonio; Maíz Apellániz, J.; Putkuri, Cristina Ester; Simón Díaz, S.; Boyajian, Tabetha S.; Fullerton, Alexander 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.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Astronomía
stars: atmospheres
binaries: spectroscopic
stars: early-type
stars: fundamental parameters
stars: individual: HD 54662 AB - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/124887
Ver los metadatos del registro completo
| id |
SEDICI_6aec82c4408bf076d4d5fc4e71052e76 |
|---|---|
| oai_identifier_str |
oai:sedici.unlp.edu.ar:10915/124887 |
| network_acronym_str |
SEDICI |
| repository_id_str |
1329 |
| network_name_str |
SEDICI (UNLP) |
| spelling |
A new spectroscopic analysis of the massive O + O type binary HD 54662 ABBarbá, Rodolfo HéctorSabín Sanjulián, C.Arias, Julia InésGamen, Roberto ClaudioMorrell, Nidia IreneFerrero Sosa, Gabriel AntonioMaíz Apellániz, J.Putkuri, Cristina EsterSimón Díaz, S.Boyajian, Tabetha S.Fullerton, Alexander W.McSwain, M. V.Astronomíastars: atmospheresbinaries: spectroscopicstars: early-typestars: fundamental parametersstars: individual: HD 54662 ABHD 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.Facultad de Ciencias Astronómicas y Geofísicas2020-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf3937-3949http://sedici.unlp.edu.ar/handle/10915/124887enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/issn/1365-2966info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/staa927info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:21:37Zoai:sedici.unlp.edu.ar:10915/124887Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:21:37.909SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| 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 Barbá, Rodolfo Héctor Astronomía stars: atmospheres binaries: spectroscopic stars: early-type stars: fundamental parameters stars: individual: HD 54662 AB |
| 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 |
Barbá, Rodolfo Héctor Sabín Sanjulián, C. Arias, Julia Inés Gamen, Roberto Claudio Morrell, Nidia Irene Ferrero Sosa, Gabriel Antonio Maíz Apellániz, J. Putkuri, Cristina Ester Simón Díaz, S. Boyajian, Tabetha S. Fullerton, Alexander W. McSwain, M. V. |
| author |
Barbá, Rodolfo Héctor |
| author_facet |
Barbá, Rodolfo Héctor Sabín Sanjulián, C. Arias, Julia Inés Gamen, Roberto Claudio Morrell, Nidia Irene Ferrero Sosa, Gabriel Antonio Maíz Apellániz, J. Putkuri, Cristina Ester Simón Díaz, S. Boyajian, Tabetha S. Fullerton, Alexander W. McSwain, M. V. |
| author_role |
author |
| author2 |
Sabín Sanjulián, C. Arias, Julia Inés Gamen, Roberto Claudio Morrell, Nidia Irene Ferrero Sosa, Gabriel Antonio Maíz Apellániz, J. Putkuri, Cristina Ester Simón Díaz, S. Boyajian, Tabetha S. Fullerton, Alexander W. McSwain, M. V. |
| author2_role |
author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Astronomía stars: atmospheres binaries: spectroscopic stars: early-type stars: fundamental parameters stars: individual: HD 54662 AB |
| topic |
Astronomía stars: atmospheres binaries: spectroscopic stars: early-type stars: fundamental parameters stars: individual: HD 54662 AB |
| 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. Facultad de Ciencias Astronómicas y Geofísicas |
| 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 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/10915/124887 |
| url |
http://sedici.unlp.edu.ar/handle/10915/124887 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0035-8711 info:eu-repo/semantics/altIdentifier/issn/1365-2966 info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/staa927 |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
| eu_rights_str_mv |
openAccess |
| rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
| dc.format.none.fl_str_mv |
application/pdf 3937-3949 |
| dc.source.none.fl_str_mv |
reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP |
| reponame_str |
SEDICI (UNLP) |
| collection |
SEDICI (UNLP) |
| instname_str |
Universidad Nacional de La Plata |
| instacron_str |
UNLP |
| institution |
UNLP |
| repository.name.fl_str_mv |
SEDICI (UNLP) - Universidad Nacional de La Plata |
| repository.mail.fl_str_mv |
alira@sedici.unlp.edu.ar |
| _version_ |
1846064273098276864 |
| score |
13.22299 |