Magnetic field detection in the bright A0-type supergiant HD 92207

Autores
Hubrig, S.; Schöller, M.; Kholtygin, A. F.; Gonzalez, Jorge Federico; Kharchenko, N. V.; Steffen, M.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Recent developments in observational techniques and theories revealed the potential significance of magnetic fields for stellar structure, evolution, and circumstellar environment. At present, the distribution of magnetic field strengths in massive stars from the zero-age main sequence to more evolved stages, which would shed light on the origin of the magnetic field, has not been studied. Aims. We searched for the presence of a magnetic field in the visually brightest early A-type supergiant HD 92207. Methods. Observations were obtained using the low-resolution spectropolarimetric mode of FORS 2 (FOcal Reducer low dispersion Spectrograph) mounted on the 8 m Antu telescope of the VLT. For the mean longitudinal magnetic field measurements, we applied a linear regression analysis in two ways: using only the absorption hydrogen Balmer lines or using the entire spectrum including all available absorption lines. Results. A mean longitudinal magnetic field at a significance level of more than 3σ was detected in two out of three observations distributed over about one year. It is one of the rare cases where a field of about a few hundred Gauss is detected in an early A-type supergiant. All line profiles in the spectra of HD 92207 undergo distinct variations in radial velocities and intensities, probably caused by previously detected non-radial pulsations.
Fil: Hubrig, S.. Leibniz Institut für Astrophysik Potsdam ; Alemania
Fil: Schöller, M.. European Southern Observatory; Alemania
Fil: Kholtygin, A. F.. Saint Petersburg State University; Rusia. Isaac Newton Institute of Chile. Saint Petersburg Branch; Rusia
Fil: Gonzalez, Jorge Federico. 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: Kharchenko, N. V.. Main Astronomical Observatory; Ucrania
Fil: Steffen, M.. Leibniz Institut für Astrophysik Potsdam ; Alemania
Materia
EARLY-TYPE
INDIVIDUAL: HD 92207
KINEMATICS AND DYNAMICS
MAGNETIC FIELD
VARIABLES: GENERAL
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:11336/69126
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/69126
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Magnetic field detection in the bright A0-type supergiant HD 92207Hubrig, S.Schöller, M.Kholtygin, A. F.Gonzalez, Jorge FedericoKharchenko, N. V.Steffen, M.EARLY-TYPEINDIVIDUAL: HD 92207KINEMATICS AND DYNAMICSMAGNETIC FIELDVARIABLES: GENERALhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. Recent developments in observational techniques and theories revealed the potential significance of magnetic fields for stellar structure, evolution, and circumstellar environment. At present, the distribution of magnetic field strengths in massive stars from the zero-age main sequence to more evolved stages, which would shed light on the origin of the magnetic field, has not been studied. Aims. We searched for the presence of a magnetic field in the visually brightest early A-type supergiant HD 92207. Methods. Observations were obtained using the low-resolution spectropolarimetric mode of FORS 2 (FOcal Reducer low dispersion Spectrograph) mounted on the 8 m Antu telescope of the VLT. For the mean longitudinal magnetic field measurements, we applied a linear regression analysis in two ways: using only the absorption hydrogen Balmer lines or using the entire spectrum including all available absorption lines. Results. A mean longitudinal magnetic field at a significance level of more than 3σ was detected in two out of three observations distributed over about one year. It is one of the rare cases where a field of about a few hundred Gauss is detected in an early A-type supergiant. All line profiles in the spectra of HD 92207 undergo distinct variations in radial velocities and intensities, probably caused by previously detected non-radial pulsations.Fil: Hubrig, S.. Leibniz Institut für Astrophysik Potsdam ; AlemaniaFil: Schöller, M.. European Southern Observatory; AlemaniaFil: Kholtygin, A. F.. Saint Petersburg State University; Rusia. Isaac Newton Institute of Chile. Saint Petersburg Branch; RusiaFil: Gonzalez, Jorge Federico. 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: Kharchenko, N. V.. Main Astronomical Observatory; UcraniaFil: Steffen, M.. Leibniz Institut für Astrophysik Potsdam ; AlemaniaEDP Sciences2012-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/69126Hubrig, S.; Schöller, M.; Kholtygin, A. F.; Gonzalez, Jorge Federico; Kharchenko, N. V.; et al.; Magnetic field detection in the bright A0-type supergiant HD 92207; EDP Sciences; Astronomy and Astrophysics; 546; 10-2012; 1-4; L60004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2012/10/aa20265-12/aa20265-12.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201220265info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:22:26Zoai:ri.conicet.gov.ar:11336/69126instacron: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 10:22:27.133CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Magnetic field detection in the bright A0-type supergiant HD 92207
title Magnetic field detection in the bright A0-type supergiant HD 92207
spellingShingle Magnetic field detection in the bright A0-type supergiant HD 92207
Hubrig, S.
EARLY-TYPE
INDIVIDUAL: HD 92207
KINEMATICS AND DYNAMICS
MAGNETIC FIELD
VARIABLES: GENERAL
title_short Magnetic field detection in the bright A0-type supergiant HD 92207
title_full Magnetic field detection in the bright A0-type supergiant HD 92207
title_fullStr Magnetic field detection in the bright A0-type supergiant HD 92207
title_full_unstemmed Magnetic field detection in the bright A0-type supergiant HD 92207
title_sort Magnetic field detection in the bright A0-type supergiant HD 92207
dc.creator.none.fl_str_mv Hubrig, S.
Schöller, M.
Kholtygin, A. F.
Gonzalez, Jorge Federico
Kharchenko, N. V.
Steffen, M.
author Hubrig, S.
author_facet Hubrig, S.
Schöller, M.
Kholtygin, A. F.
Gonzalez, Jorge Federico
Kharchenko, N. V.
Steffen, M.
author_role author
author2 Schöller, M.
Kholtygin, A. F.
Gonzalez, Jorge Federico
Kharchenko, N. V.
Steffen, M.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv EARLY-TYPE
INDIVIDUAL: HD 92207
KINEMATICS AND DYNAMICS
MAGNETIC FIELD
VARIABLES: GENERAL
topic EARLY-TYPE
INDIVIDUAL: HD 92207
KINEMATICS AND DYNAMICS
MAGNETIC FIELD
VARIABLES: GENERAL
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. Recent developments in observational techniques and theories revealed the potential significance of magnetic fields for stellar structure, evolution, and circumstellar environment. At present, the distribution of magnetic field strengths in massive stars from the zero-age main sequence to more evolved stages, which would shed light on the origin of the magnetic field, has not been studied. Aims. We searched for the presence of a magnetic field in the visually brightest early A-type supergiant HD 92207. Methods. Observations were obtained using the low-resolution spectropolarimetric mode of FORS 2 (FOcal Reducer low dispersion Spectrograph) mounted on the 8 m Antu telescope of the VLT. For the mean longitudinal magnetic field measurements, we applied a linear regression analysis in two ways: using only the absorption hydrogen Balmer lines or using the entire spectrum including all available absorption lines. Results. A mean longitudinal magnetic field at a significance level of more than 3σ was detected in two out of three observations distributed over about one year. It is one of the rare cases where a field of about a few hundred Gauss is detected in an early A-type supergiant. All line profiles in the spectra of HD 92207 undergo distinct variations in radial velocities and intensities, probably caused by previously detected non-radial pulsations.
Fil: Hubrig, S.. Leibniz Institut für Astrophysik Potsdam ; Alemania
Fil: Schöller, M.. European Southern Observatory; Alemania
Fil: Kholtygin, A. F.. Saint Petersburg State University; Rusia. Isaac Newton Institute of Chile. Saint Petersburg Branch; Rusia
Fil: Gonzalez, Jorge Federico. 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: Kharchenko, N. V.. Main Astronomical Observatory; Ucrania
Fil: Steffen, M.. Leibniz Institut für Astrophysik Potsdam ; Alemania
description Context. Recent developments in observational techniques and theories revealed the potential significance of magnetic fields for stellar structure, evolution, and circumstellar environment. At present, the distribution of magnetic field strengths in massive stars from the zero-age main sequence to more evolved stages, which would shed light on the origin of the magnetic field, has not been studied. Aims. We searched for the presence of a magnetic field in the visually brightest early A-type supergiant HD 92207. Methods. Observations were obtained using the low-resolution spectropolarimetric mode of FORS 2 (FOcal Reducer low dispersion Spectrograph) mounted on the 8 m Antu telescope of the VLT. For the mean longitudinal magnetic field measurements, we applied a linear regression analysis in two ways: using only the absorption hydrogen Balmer lines or using the entire spectrum including all available absorption lines. Results. A mean longitudinal magnetic field at a significance level of more than 3σ was detected in two out of three observations distributed over about one year. It is one of the rare cases where a field of about a few hundred Gauss is detected in an early A-type supergiant. All line profiles in the spectra of HD 92207 undergo distinct variations in radial velocities and intensities, probably caused by previously detected non-radial pulsations.
publishDate 2012
dc.date.none.fl_str_mv 2012-10
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/11336/69126
Hubrig, S.; Schöller, M.; Kholtygin, A. F.; Gonzalez, Jorge Federico; Kharchenko, N. V.; et al.; Magnetic field detection in the bright A0-type supergiant HD 92207; EDP Sciences; Astronomy and Astrophysics; 546; 10-2012; 1-4; L6
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/69126
identifier_str_mv Hubrig, S.; Schöller, M.; Kholtygin, A. F.; Gonzalez, Jorge Federico; Kharchenko, N. V.; et al.; Magnetic field detection in the bright A0-type supergiant HD 92207; EDP Sciences; Astronomy and Astrophysics; 546; 10-2012; 1-4; L6
0004-6361
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://www.aanda.org/articles/aa/abs/2012/10/aa20265-12/aa20265-12.html
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201220265
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
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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 13.070432

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