New spectroscopic and polarimetric observations of the A0 supergiant HD 92207

Autores
Hubrig, S.; Kholtygin, A. F.; Schöller, M.; Anderson, R. I.; Saesen, S.; Gonzalez, Jorge Federico; Ilyin, I.; Briquet, M.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Our recent search for the presence of a magnetic field in the bright earlyA-type supergiant HD92207 using FORS2 in spectropolarimetric mode revealed thepresence of a longitudinal magnetic field of the order of a few hundred Gauss.However, the definite confirmation of the magnetic nature of this objectremained pending due to the detection of short-term spectral variabilityprobably affecting the position of line profiles in left- and right-handpolarized spectra. We present new magnetic field measurements of HD92207obtained on three different epochs in 2013 and 2014 using FORS2 inspectropolarimetric mode. A 3sigma detection of the mean longitudinal magneticfield using the entire spectrum, _all=104+-34G, was achieved inobservations obtained in 2014 January. At this epoch, the position of thespectral lines appeared stable. Our analysis of spectral line shapes recordedin opposite circularly polarized light, i.e. in light with opposite sense ofrotation, reveals that line profiles in the light polarized in a certaindirection appear slightly split. The mechanism causing such a behaviour in thecircularly polarized light is currently unknown. Trying to settle the issue ofshort-term variability, we searched for changes in the spectral line profileson a time scale of 8-10min using HARPS polarimetric spectra and on a time scaleof 3-4min using time series obtained with the CORALIE spectrograph. Nosignificant variability was detected on these time scales during the epochsstudied.
Fil: Hubrig, S.. Leibniz-Institut f¨ur Astrophysik Potsdam; Alemania
Fil: Kholtygin, A. F.. Saint-Petersburg State University. Astronomical Institute; Rusia
Fil: Schöller, M.. European Southern Observatory; Alemania
Fil: Anderson, R. I.. Geneva University. Geneva Observatory; Suiza. Johns Hopkins University. Department of Physics and Astronomy; Estados Unidos
Fil: Saesen, S.. Geneva University. Geneva Observatory; Suiza
Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Cientí­ficas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; Argentina
Fil: Ilyin, I.. Leibniz-Institut f¨ur Astrophysik Potsdam; Alemania
Fil: Briquet, M.. Université de Liège. Institut d’Astrophysique et de Géophysique; Bélgica
Materia
Early-Type Stars
Polarimetric
Atmospheres
Magnetic Fields
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:11336/4887
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/4887
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling New spectroscopic and polarimetric observations of the A0 supergiant HD 92207Hubrig, S.Kholtygin, A. F.Schöller, M.Anderson, R. I.Saesen, S.Gonzalez, Jorge FedericoIlyin, I.Briquet, M.Early-Type StarsPolarimetricAtmospheresMagnetic Fieldshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Our recent search for the presence of a magnetic field in the bright earlyA-type supergiant HD92207 using FORS2 in spectropolarimetric mode revealed thepresence of a longitudinal magnetic field of the order of a few hundred Gauss.However, the definite confirmation of the magnetic nature of this objectremained pending due to the detection of short-term spectral variabilityprobably affecting the position of line profiles in left- and right-handpolarized spectra. We present new magnetic field measurements of HD92207obtained on three different epochs in 2013 and 2014 using FORS2 inspectropolarimetric mode. A 3sigma detection of the mean longitudinal magneticfield using the entire spectrum, <B_z>_all=104+-34G, was achieved inobservations obtained in 2014 January. At this epoch, the position of thespectral lines appeared stable. Our analysis of spectral line shapes recordedin opposite circularly polarized light, i.e. in light with opposite sense ofrotation, reveals that line profiles in the light polarized in a certaindirection appear slightly split. The mechanism causing such a behaviour in thecircularly polarized light is currently unknown. Trying to settle the issue ofshort-term variability, we searched for changes in the spectral line profileson a time scale of 8-10min using HARPS polarimetric spectra and on a time scaleof 3-4min using time series obtained with the CORALIE spectrograph. Nosignificant variability was detected on these time scales during the epochsstudied.Fil: Hubrig, S.. Leibniz-Institut f¨ur Astrophysik Potsdam; AlemaniaFil: Kholtygin, A. F.. Saint-Petersburg State University. Astronomical Institute; RusiaFil: Schöller, M.. European Southern Observatory; AlemaniaFil: Anderson, R. I.. Geneva University. Geneva Observatory; Suiza. Johns Hopkins University. Department of Physics and Astronomy; Estados UnidosFil: Saesen, S.. Geneva University. Geneva Observatory; SuizaFil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Cientí­ficas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; ArgentinaFil: Ilyin, I.. Leibniz-Institut f¨ur Astrophysik Potsdam; AlemaniaFil: Briquet, M.. Université de Liège. Institut d’Astrophysique et de Géophysique; BélgicaWiley2015-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4887Hubrig, S.; Kholtygin, A. F.; Schöller, M.; Anderson, R. I.; Saesen, S.; et al.; New spectroscopic and polarimetric observations of the A0 supergiant HD 92207; Wiley; Astronomische Nachrichten; 336; 2; 2-2015; 168-1770004-6337enginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/asna.201412150/abstractinfo:eu-repo/semantics/altIdentifier/doi/10.1002/asna.201412150info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1502.00227info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:13:33Zoai:ri.conicet.gov.ar:11336/4887instacron: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 10:13:33.441CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New spectroscopic and polarimetric observations of the A0 supergiant HD 92207
title New spectroscopic and polarimetric observations of the A0 supergiant HD 92207
spellingShingle New spectroscopic and polarimetric observations of the A0 supergiant HD 92207
Hubrig, S.
Early-Type Stars
Polarimetric
Atmospheres
Magnetic Fields
title_short New spectroscopic and polarimetric observations of the A0 supergiant HD 92207
title_full New spectroscopic and polarimetric observations of the A0 supergiant HD 92207
title_fullStr New spectroscopic and polarimetric observations of the A0 supergiant HD 92207
title_full_unstemmed New spectroscopic and polarimetric observations of the A0 supergiant HD 92207
title_sort New spectroscopic and polarimetric observations of the A0 supergiant HD 92207
dc.creator.none.fl_str_mv Hubrig, S.
Kholtygin, A. F.
Schöller, M.
Anderson, R. I.
Saesen, S.
Gonzalez, Jorge Federico
Ilyin, I.
Briquet, M.
author Hubrig, S.
author_facet Hubrig, S.
Kholtygin, A. F.
Schöller, M.
Anderson, R. I.
Saesen, S.
Gonzalez, Jorge Federico
Ilyin, I.
Briquet, M.
author_role author
author2 Kholtygin, A. F.
Schöller, M.
Anderson, R. I.
Saesen, S.
Gonzalez, Jorge Federico
Ilyin, I.
Briquet, M.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Early-Type Stars
Polarimetric
Atmospheres
Magnetic Fields
topic Early-Type Stars
Polarimetric
Atmospheres
Magnetic Fields
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Our recent search for the presence of a magnetic field in the bright earlyA-type supergiant HD92207 using FORS2 in spectropolarimetric mode revealed thepresence of a longitudinal magnetic field of the order of a few hundred Gauss.However, the definite confirmation of the magnetic nature of this objectremained pending due to the detection of short-term spectral variabilityprobably affecting the position of line profiles in left- and right-handpolarized spectra. We present new magnetic field measurements of HD92207obtained on three different epochs in 2013 and 2014 using FORS2 inspectropolarimetric mode. A 3sigma detection of the mean longitudinal magneticfield using the entire spectrum, <B_z>_all=104+-34G, was achieved inobservations obtained in 2014 January. At this epoch, the position of thespectral lines appeared stable. Our analysis of spectral line shapes recordedin opposite circularly polarized light, i.e. in light with opposite sense ofrotation, reveals that line profiles in the light polarized in a certaindirection appear slightly split. The mechanism causing such a behaviour in thecircularly polarized light is currently unknown. Trying to settle the issue ofshort-term variability, we searched for changes in the spectral line profileson a time scale of 8-10min using HARPS polarimetric spectra and on a time scaleof 3-4min using time series obtained with the CORALIE spectrograph. Nosignificant variability was detected on these time scales during the epochsstudied.
Fil: Hubrig, S.. Leibniz-Institut f¨ur Astrophysik Potsdam; Alemania
Fil: Kholtygin, A. F.. Saint-Petersburg State University. Astronomical Institute; Rusia
Fil: Schöller, M.. European Southern Observatory; Alemania
Fil: Anderson, R. I.. Geneva University. Geneva Observatory; Suiza. Johns Hopkins University. Department of Physics and Astronomy; Estados Unidos
Fil: Saesen, S.. Geneva University. Geneva Observatory; Suiza
Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Cientí­ficas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; Argentina
Fil: Ilyin, I.. Leibniz-Institut f¨ur Astrophysik Potsdam; Alemania
Fil: Briquet, M.. Université de Liège. Institut d’Astrophysique et de Géophysique; Bélgica
description Our recent search for the presence of a magnetic field in the bright earlyA-type supergiant HD92207 using FORS2 in spectropolarimetric mode revealed thepresence of a longitudinal magnetic field of the order of a few hundred Gauss.However, the definite confirmation of the magnetic nature of this objectremained pending due to the detection of short-term spectral variabilityprobably affecting the position of line profiles in left- and right-handpolarized spectra. We present new magnetic field measurements of HD92207obtained on three different epochs in 2013 and 2014 using FORS2 inspectropolarimetric mode. A 3sigma detection of the mean longitudinal magneticfield using the entire spectrum, <B_z>_all=104+-34G, was achieved inobservations obtained in 2014 January. At this epoch, the position of thespectral lines appeared stable. Our analysis of spectral line shapes recordedin opposite circularly polarized light, i.e. in light with opposite sense ofrotation, reveals that line profiles in the light polarized in a certaindirection appear slightly split. The mechanism causing such a behaviour in thecircularly polarized light is currently unknown. Trying to settle the issue ofshort-term variability, we searched for changes in the spectral line profileson a time scale of 8-10min using HARPS polarimetric spectra and on a time scaleof 3-4min using time series obtained with the CORALIE spectrograph. Nosignificant variability was detected on these time scales during the epochsstudied.
publishDate 2015
dc.date.none.fl_str_mv 2015-02
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/11336/4887
Hubrig, S.; Kholtygin, A. F.; Schöller, M.; Anderson, R. I.; Saesen, S.; et al.; New spectroscopic and polarimetric observations of the A0 supergiant HD 92207; Wiley; Astronomische Nachrichten; 336; 2; 2-2015; 168-177
0004-6337
url http://hdl.handle.net/11336/4887
identifier_str_mv Hubrig, S.; Kholtygin, A. F.; Schöller, M.; Anderson, R. I.; Saesen, S.; et al.; New spectroscopic and polarimetric observations of the A0 supergiant HD 92207; Wiley; Astronomische Nachrichten; 336; 2; 2-2015; 168-177
0004-6337
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/asna.201412150/abstract
info:eu-repo/semantics/altIdentifier/doi/10.1002/asna.201412150
info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1502.00227
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
publisher.none.fl_str_mv Wiley
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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