On the multiplicity of the zero-age main-sequence O star Herschel 36

Autores
Arias, Julia Inés; Barbá, Rodolfo Héctor; Gamen, Roberto Claudio; Morrell, Nidia Irene; Maíz Apellániz, Jesús; Alfaro, Emilio J.; Sota, Alfredo; Walborn, Nolan Revere; Moni Bidin, Cristian
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present the analysis of high-resolution optical spectroscopic observations of the zero-age main-sequence O star Herschel 36 spanning six years. This star is definitely a multiple system, with at least three components detected in its spectrum. Based on our radial-velocity (RV) study, we propose a picture of a close massive binary and a more distant companion, most probably in wide orbit about each other. The orbital solution for the binary, whose components we identify as O9V and B0.5V, is characterized by a period of 1.5415 0.0006 days. With a spectral type O7.5V, the third body is the most luminous component of the system and also presents RV variations with a period close to 498 days. Some possible hypotheses to explain the variability are briefly addressed and further observations are suggested.
Instituto de Astrofísica de La Plata
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Binaries: close
Stars: early-type
Stars: individual (Herschel 36)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/82458
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/82458
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling On the multiplicity of the zero-age main-sequence O star Herschel 36Arias, Julia InésBarbá, Rodolfo HéctorGamen, Roberto ClaudioMorrell, Nidia IreneMaíz Apellániz, JesúsAlfaro, Emilio J.Sota, AlfredoWalborn, Nolan RevereMoni Bidin, CristianCiencias AstronómicasBinaries: closeStars: early-typeStars: individual (Herschel 36)We present the analysis of high-resolution optical spectroscopic observations of the zero-age main-sequence O star Herschel 36 spanning six years. This star is definitely a multiple system, with at least three components detected in its spectrum. Based on our radial-velocity (RV) study, we propose a picture of a close massive binary and a more distant companion, most probably in wide orbit about each other. The orbital solution for the binary, whose components we identify as O9V and B0.5V, is characterized by a period of 1.5415 0.0006 days. With a spectral type O7.5V, the third body is the most luminous component of the system and also presents RV variations with a period close to 498 days. Some possible hypotheses to explain the variability are briefly addressed and further observations are suggested.Instituto de Astrofísica de La PlataFacultad de Ciencias Astronómicas y Geofísicas2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfL30-L34http://sedici.unlp.edu.ar/handle/10915/82458enginfo:eu-repo/semantics/altIdentifier/issn/2041-8205info:eu-repo/semantics/altIdentifier/doi/10.1088/2041-8205/710/1/L30info: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:UNLP2025-10-22T16:56:22Zoai:sedici.unlp.edu.ar:10915/82458Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:56:22.574SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv On the multiplicity of the zero-age main-sequence O star Herschel 36
title On the multiplicity of the zero-age main-sequence O star Herschel 36
spellingShingle On the multiplicity of the zero-age main-sequence O star Herschel 36
Arias, Julia Inés
Ciencias Astronómicas
Binaries: close
Stars: early-type
Stars: individual (Herschel 36)
title_short On the multiplicity of the zero-age main-sequence O star Herschel 36
title_full On the multiplicity of the zero-age main-sequence O star Herschel 36
title_fullStr On the multiplicity of the zero-age main-sequence O star Herschel 36
title_full_unstemmed On the multiplicity of the zero-age main-sequence O star Herschel 36
title_sort On the multiplicity of the zero-age main-sequence O star Herschel 36
dc.creator.none.fl_str_mv Arias, Julia Inés
Barbá, Rodolfo Héctor
Gamen, Roberto Claudio
Morrell, Nidia Irene
Maíz Apellániz, Jesús
Alfaro, Emilio J.
Sota, Alfredo
Walborn, Nolan Revere
Moni Bidin, Cristian
author Arias, Julia Inés
author_facet Arias, Julia Inés
Barbá, Rodolfo Héctor
Gamen, Roberto Claudio
Morrell, Nidia Irene
Maíz Apellániz, Jesús
Alfaro, Emilio J.
Sota, Alfredo
Walborn, Nolan Revere
Moni Bidin, Cristian
author_role author
author2 Barbá, Rodolfo Héctor
Gamen, Roberto Claudio
Morrell, Nidia Irene
Maíz Apellániz, Jesús
Alfaro, Emilio J.
Sota, Alfredo
Walborn, Nolan Revere
Moni Bidin, Cristian
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Binaries: close
Stars: early-type
Stars: individual (Herschel 36)
topic Ciencias Astronómicas
Binaries: close
Stars: early-type
Stars: individual (Herschel 36)
dc.description.none.fl_txt_mv We present the analysis of high-resolution optical spectroscopic observations of the zero-age main-sequence O star Herschel 36 spanning six years. This star is definitely a multiple system, with at least three components detected in its spectrum. Based on our radial-velocity (RV) study, we propose a picture of a close massive binary and a more distant companion, most probably in wide orbit about each other. The orbital solution for the binary, whose components we identify as O9V and B0.5V, is characterized by a period of 1.5415 0.0006 days. With a spectral type O7.5V, the third body is the most luminous component of the system and also presents RV variations with a period close to 498 days. Some possible hypotheses to explain the variability are briefly addressed and further observations are suggested.
Instituto de Astrofísica de La Plata
Facultad de Ciencias Astronómicas y Geofísicas
description We present the analysis of high-resolution optical spectroscopic observations of the zero-age main-sequence O star Herschel 36 spanning six years. This star is definitely a multiple system, with at least three components detected in its spectrum. Based on our radial-velocity (RV) study, we propose a picture of a close massive binary and a more distant companion, most probably in wide orbit about each other. The orbital solution for the binary, whose components we identify as O9V and B0.5V, is characterized by a period of 1.5415 0.0006 days. With a spectral type O7.5V, the third body is the most luminous component of the system and also presents RV variations with a period close to 498 days. Some possible hypotheses to explain the variability are briefly addressed and further observations are suggested.
publishDate 2010
dc.date.none.fl_str_mv 2010
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/10915/82458
url http://sedici.unlp.edu.ar/handle/10915/82458
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2041-8205
info:eu-repo/semantics/altIdentifier/doi/10.1088/2041-8205/710/1/L30
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
L30-L34
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
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score 12.982451

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