A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary

Autores
Wade, G. A.; Smoker, J. V.; Evans, C. J.; Howarth, I. D.; Barba, Rodolfo Héctor; Cox, N. L. J.; Morrell, Nidia Irene; Nazé, Yaël; Cami, J.; Farhang, A.; Walborn, Nolan Revere; Arias, J.; Gamen, Roberto Claudio
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report newspectroscopic observations of themagnetic Of?p starHD148937 obtained since 2015 that differ qualitatively from its extensive historical record of weak, periodic spectral variations. This remarkable behaviour represents clear evidence for an unprecedented change in the character of variability of the star. In this paper, we describe the new spectral properties and compare them to the previous line profiles. Based on measurements of the radial velocities of the C III/N III emission lines near 4640 Å and the CIV absorption lines near 5800 Å, we infer that HD148937 is likely a high-mass, double-lined spectroscopic binary. Combining the spectroscopic orbit with an archival interferometric measurement of the apparent separation of the equal brightness components, we tentatively conclude that HD148937 consists of two O-type stars with masses of approximately 34 and 49 Mo, orbiting in an eccentric (e = 0.75), long-period (Porb 26 yr) orbit. We discuss the potential relationship of the binary system to the peculiar properties of HD148937, and propose future observations to refine the orbital and stellar properties.
Fil: Wade, G. A.. Royal Military College of Canada; Canadá
Fil: Smoker, J. V.. European Southern Observatory Chile; Chile
Fil: Evans, C. J.. Uk Astronomy Technology Centre, Royal Observatory; Reino Unido
Fil: Howarth, I. D.. Colegio Universitario de Londres; Reino Unido
Fil: Barba, Rodolfo Héctor. Universidad de La Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Cox, N. L. J.. University of Amsterdam; Países Bajos
Fil: Morrell, Nidia Irene. Las Campanas Observatory, Carnegie Observatories; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Nazé, Yaël. Université de Liège; Bélgica
Fil: Cami, J.. The University of Western Ontario; Reino Unido. SETI Institute; Estados Unidos
Fil: Farhang, A.. The University of Western Ontario; Reino Unido. Institute for Research in Fundamental Sciences; Irán
Fil: Walborn, Nolan Revere. Space Telescope Science Institute; Estados Unidos
Fil: Arias, J.. 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
Materia
BINARIES: SPECTROSCOPIC
STARS: MASSIVE
STARS: ROTATION
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:11336/125389
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/125389
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binaryWade, G. A.Smoker, J. V.Evans, C. J.Howarth, I. D.Barba, Rodolfo HéctorCox, N. L. J.Morrell, Nidia IreneNazé, YaëlCami, J.Farhang, A.Walborn, Nolan RevereArias, J.Gamen, Roberto ClaudioBINARIES: SPECTROSCOPICSTARS: MASSIVESTARS: ROTATIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We report newspectroscopic observations of themagnetic Of?p starHD148937 obtained since 2015 that differ qualitatively from its extensive historical record of weak, periodic spectral variations. This remarkable behaviour represents clear evidence for an unprecedented change in the character of variability of the star. In this paper, we describe the new spectral properties and compare them to the previous line profiles. Based on measurements of the radial velocities of the C III/N III emission lines near 4640 Å and the CIV absorption lines near 5800 Å, we infer that HD148937 is likely a high-mass, double-lined spectroscopic binary. Combining the spectroscopic orbit with an archival interferometric measurement of the apparent separation of the equal brightness components, we tentatively conclude that HD148937 consists of two O-type stars with masses of approximately 34 and 49 Mo, orbiting in an eccentric (e = 0.75), long-period (Porb 26 yr) orbit. We discuss the potential relationship of the binary system to the peculiar properties of HD148937, and propose future observations to refine the orbital and stellar properties.Fil: Wade, G. A.. Royal Military College of Canada; CanadáFil: Smoker, J. V.. European Southern Observatory Chile; ChileFil: Evans, C. J.. Uk Astronomy Technology Centre, Royal Observatory; Reino UnidoFil: Howarth, I. D.. Colegio Universitario de Londres; Reino UnidoFil: Barba, Rodolfo Héctor. Universidad de La Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Cox, N. L. J.. University of Amsterdam; Países BajosFil: Morrell, Nidia Irene. Las Campanas Observatory, Carnegie Observatories; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Nazé, Yaël. Université de Liège; BélgicaFil: Cami, J.. The University of Western Ontario; Reino Unido. SETI Institute; Estados UnidosFil: Farhang, A.. The University of Western Ontario; Reino Unido. Institute for Research in Fundamental Sciences; IránFil: Walborn, Nolan Revere. Space Telescope Science Institute; Estados UnidosFil: Arias, J.. 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; ArgentinaWiley Blackwell Publishing, Inc2018-12-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/125389Wade, G. A.; Smoker, J. V.; Evans, C. J.; Howarth, I. D.; Barba, Rodolfo Héctor; et al.; A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 483; 2; 6-12-2018; 2581-25910035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/483/2/2581/5232377info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty3304info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:02:26Zoai:ri.conicet.gov.ar:11336/125389instacron: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 11:02:26.477CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary
title A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary
spellingShingle A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary
Wade, G. A.
BINARIES: SPECTROSCOPIC
STARS: MASSIVE
STARS: ROTATION
title_short A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary
title_full A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary
title_fullStr A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary
title_full_unstemmed A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary
title_sort A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary
dc.creator.none.fl_str_mv Wade, G. A.
Smoker, J. V.
Evans, C. J.
Howarth, I. D.
Barba, Rodolfo Héctor
Cox, N. L. J.
Morrell, Nidia Irene
Nazé, Yaël
Cami, J.
Farhang, A.
Walborn, Nolan Revere
Arias, J.
Gamen, Roberto Claudio
author Wade, G. A.
author_facet Wade, G. A.
Smoker, J. V.
Evans, C. J.
Howarth, I. D.
Barba, Rodolfo Héctor
Cox, N. L. J.
Morrell, Nidia Irene
Nazé, Yaël
Cami, J.
Farhang, A.
Walborn, Nolan Revere
Arias, J.
Gamen, Roberto Claudio
author_role author
author2 Smoker, J. V.
Evans, C. J.
Howarth, I. D.
Barba, Rodolfo Héctor
Cox, N. L. J.
Morrell, Nidia Irene
Nazé, Yaël
Cami, J.
Farhang, A.
Walborn, Nolan Revere
Arias, J.
Gamen, Roberto Claudio
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv BINARIES: SPECTROSCOPIC
STARS: MASSIVE
STARS: ROTATION
topic BINARIES: SPECTROSCOPIC
STARS: MASSIVE
STARS: ROTATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report newspectroscopic observations of themagnetic Of?p starHD148937 obtained since 2015 that differ qualitatively from its extensive historical record of weak, periodic spectral variations. This remarkable behaviour represents clear evidence for an unprecedented change in the character of variability of the star. In this paper, we describe the new spectral properties and compare them to the previous line profiles. Based on measurements of the radial velocities of the C III/N III emission lines near 4640 Å and the CIV absorption lines near 5800 Å, we infer that HD148937 is likely a high-mass, double-lined spectroscopic binary. Combining the spectroscopic orbit with an archival interferometric measurement of the apparent separation of the equal brightness components, we tentatively conclude that HD148937 consists of two O-type stars with masses of approximately 34 and 49 Mo, orbiting in an eccentric (e = 0.75), long-period (Porb 26 yr) orbit. We discuss the potential relationship of the binary system to the peculiar properties of HD148937, and propose future observations to refine the orbital and stellar properties.
Fil: Wade, G. A.. Royal Military College of Canada; Canadá
Fil: Smoker, J. V.. European Southern Observatory Chile; Chile
Fil: Evans, C. J.. Uk Astronomy Technology Centre, Royal Observatory; Reino Unido
Fil: Howarth, I. D.. Colegio Universitario de Londres; Reino Unido
Fil: Barba, Rodolfo Héctor. Universidad de La Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentina
Fil: Cox, N. L. J.. University of Amsterdam; Países Bajos
Fil: Morrell, Nidia Irene. Las Campanas Observatory, Carnegie Observatories; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Nazé, Yaël. Université de Liège; Bélgica
Fil: Cami, J.. The University of Western Ontario; Reino Unido. SETI Institute; Estados Unidos
Fil: Farhang, A.. The University of Western Ontario; Reino Unido. Institute for Research in Fundamental Sciences; Irán
Fil: Walborn, Nolan Revere. Space Telescope Science Institute; Estados Unidos
Fil: Arias, J.. 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
description We report newspectroscopic observations of themagnetic Of?p starHD148937 obtained since 2015 that differ qualitatively from its extensive historical record of weak, periodic spectral variations. This remarkable behaviour represents clear evidence for an unprecedented change in the character of variability of the star. In this paper, we describe the new spectral properties and compare them to the previous line profiles. Based on measurements of the radial velocities of the C III/N III emission lines near 4640 Å and the CIV absorption lines near 5800 Å, we infer that HD148937 is likely a high-mass, double-lined spectroscopic binary. Combining the spectroscopic orbit with an archival interferometric measurement of the apparent separation of the equal brightness components, we tentatively conclude that HD148937 consists of two O-type stars with masses of approximately 34 and 49 Mo, orbiting in an eccentric (e = 0.75), long-period (Porb 26 yr) orbit. We discuss the potential relationship of the binary system to the peculiar properties of HD148937, and propose future observations to refine the orbital and stellar properties.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-06
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/11336/125389
Wade, G. A.; Smoker, J. V.; Evans, C. J.; Howarth, I. D.; Barba, Rodolfo Héctor; et al.; A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 483; 2; 6-12-2018; 2581-2591
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/125389
identifier_str_mv Wade, G. A.; Smoker, J. V.; Evans, C. J.; Howarth, I. D.; Barba, Rodolfo Héctor; et al.; A remarkable change of the spectrum of the magnetic Of?p star HD148937 reveals evidence of an eccentric, high-mass binary; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 483; 2; 6-12-2018; 2581-2591
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/483/2/2581/5232377
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty3304
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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