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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/125389
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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 Técnicas2025-09-29T09:34:23Zoai: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:34982025-09-29 09:34:24.008CONICET 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) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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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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