Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400

Autores
Hubrig, S.; Castelli, F.; Gonzalez, Jorge Federico; Carroll, T. A.; Ilyin, I.; Schöller, M.; Drake, N. A.; Korhonen, H.; Briquet, M.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The aim of this study is to carry out an abundance determination, to search for spectral variability and for the presence of a weak magnetic field in the typical PGa star HD 19400. High-resolution, high signal-to-noise High Accuracy Radial-velocity Planet Searcher (HARPS) spectropolarimetric observations of HD 19400 were obtained at three different epochs in 2011 and 2013. For the first time, we present abundances of various elements determined using an ATLAS12 model, including the abundances of a number of elements not analysed by previous studies, such as Ne I, Ga II, and Xe II. Several lines of As II are also present in the spectra of HD 19400. To study the variability, we compared the behaviour of the line profiles of various elements. We report on the first detection of anomalous shapes of line profiles belonging to Mn and Hg, and the variability of the line profiles belonging to the elements Hg, P, Mn, Fe, and Ga. We suggest that the variability of the line profiles of these elements is caused by their non-uniform surface distribution, similar to the presence of chemical spots detected in HgMn stars. The search for the presence of a magnetic field was carried out using the moment technique and the Singular Value Decomposition (SVD) method. Our measurements of the magnetic field with the moment technique using 22 Mn II lines indicate the potential existence of a weak variable longitudinal magnetic field on the first epoch. The SVD method applied to the Mn II lines indicates 〈Bz〉 = −76 ± 25 G on the first epoch, and at the same epoch the SVD analysis of the observations using the Fe II lines shows 〈Bz〉 = −91 ± 35 G. The calculated false alarm probability values, 0.008 and 0.003, respectively, are above the value 10−3, indicating no detection.
Fil: Hubrig, S.. Leibniz-Institut fur Astrophysik Potsdam; Alemania
Fil: Castelli, F.. Istituto Nazionale di Astrofisica. Osservatorio Astronomico di Trieste; Italia
Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Cienti­ficas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; Argentina
Fil: Carroll, T. A. . Leibniz-Institut fur Astrophysik Potsdam; Alemania
Fil: Ilyin, I.. Leibniz-Institut fur Astrophysik Potsdam; Alemania
Fil: Schöller, M.. European Southern Observatory; Alemania
Fil: Drake, N. A.. St Petersburg State University. Sobolev Astronomical Institute; Rusia. Observatorio Nacional/MCTI; Brasil
Fil: Korhonen, H.. University of Turku. Finnish Centre for Astronomy with ESO; Finlandia
Fil: Briquet, M.. Université de Liège. Institut d’Astrophysique et de Geophysique; Bélgica
Materia
stars: abundances
stars: atmospheres
stars: chemically peculiar
stars: magnetic field
stars: 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:11336/4997
Acceder
id CONICETDig_a2e635abe854c8498453c490b7d6831b
oai_identifier_str oai:ri.conicet.gov.ar:11336/4997
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400Hubrig, S.Castelli, F.Gonzalez, Jorge FedericoCarroll, T. A. Ilyin, I.Schöller, M.Drake, N. A.Korhonen, H.Briquet, M.stars: abundancesstars: atmospheresstars: chemically peculiarstars: magnetic fieldstars: variables: generalhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The aim of this study is to carry out an abundance determination, to search for spectral variability and for the presence of a weak magnetic field in the typical PGa star HD 19400. High-resolution, high signal-to-noise High Accuracy Radial-velocity Planet Searcher (HARPS) spectropolarimetric observations of HD 19400 were obtained at three different epochs in 2011 and 2013. For the first time, we present abundances of various elements determined using an ATLAS12 model, including the abundances of a number of elements not analysed by previous studies, such as Ne I, Ga II, and Xe II. Several lines of As II are also present in the spectra of HD 19400. To study the variability, we compared the behaviour of the line profiles of various elements. We report on the first detection of anomalous shapes of line profiles belonging to Mn and Hg, and the variability of the line profiles belonging to the elements Hg, P, Mn, Fe, and Ga. We suggest that the variability of the line profiles of these elements is caused by their non-uniform surface distribution, similar to the presence of chemical spots detected in HgMn stars. The search for the presence of a magnetic field was carried out using the moment technique and the Singular Value Decomposition (SVD) method. Our measurements of the magnetic field with the moment technique using 22 Mn II lines indicate the potential existence of a weak variable longitudinal magnetic field on the first epoch. The SVD method applied to the Mn II lines indicates 〈Bz〉 = −76 ± 25 G on the first epoch, and at the same epoch the SVD analysis of the observations using the Fe II lines shows 〈Bz〉 = −91 ± 35 G. The calculated false alarm probability values, 0.008 and 0.003, respectively, are above the value 10−3, indicating no detection.Fil: Hubrig, S.. Leibniz-Institut fur Astrophysik Potsdam; AlemaniaFil: Castelli, F.. Istituto Nazionale di Astrofisica. Osservatorio Astronomico di Trieste; ItaliaFil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Cienti­ficas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; ArgentinaFil: Carroll, T. A. . Leibniz-Institut fur Astrophysik Potsdam; AlemaniaFil: Ilyin, I.. Leibniz-Institut fur Astrophysik Potsdam; AlemaniaFil: Schöller, M.. European Southern Observatory; AlemaniaFil: Drake, N. A.. St Petersburg State University. Sobolev Astronomical Institute; Rusia. Observatorio Nacional/MCTI; BrasilFil: Korhonen, H.. University of Turku. Finnish Centre for Astronomy with ESO; FinlandiaFil: Briquet, M.. Université de Liège. Institut d’Astrophysique et de Geophysique; BélgicaOxford University Press2014-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4997Hubrig, S.; Castelli, F.; Gonzalez, Jorge Federico; Carroll, T. A. ; Ilyin, I.; et al.; Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 442; 4; 8-2014; 3604-36150035-8711enginfo:eu-repo/semantics/altIdentifier/url/http://mnras.oxfordjournals.org/content/442/4/3604.abstractinfo:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu1122info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1406.1927v1info:eu-repo/semantics/altIdentifier/arxiv/1406.1927v1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:14:04Zoai:ri.conicet.gov.ar:11336/4997instacron: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 11:14:04.758CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400
title Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400
spellingShingle Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400
Hubrig, S.
stars: abundances
stars: atmospheres
stars: chemically peculiar
stars: magnetic field
stars: variables: general
title_short Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400
title_full Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400
title_fullStr Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400
title_full_unstemmed Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400
title_sort Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400
dc.creator.none.fl_str_mv Hubrig, S.
Castelli, F.
Gonzalez, Jorge Federico
Carroll, T. A.
Ilyin, I.
Schöller, M.
Drake, N. A.
Korhonen, H.
Briquet, M.
author Hubrig, S.
author_facet Hubrig, S.
Castelli, F.
Gonzalez, Jorge Federico
Carroll, T. A.
Ilyin, I.
Schöller, M.
Drake, N. A.
Korhonen, H.
Briquet, M.
author_role author
author2 Castelli, F.
Gonzalez, Jorge Federico
Carroll, T. A.
Ilyin, I.
Schöller, M.
Drake, N. A.
Korhonen, H.
Briquet, M.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv stars: abundances
stars: atmospheres
stars: chemically peculiar
stars: magnetic field
stars: variables: general
topic stars: abundances
stars: atmospheres
stars: chemically peculiar
stars: magnetic field
stars: 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 The aim of this study is to carry out an abundance determination, to search for spectral variability and for the presence of a weak magnetic field in the typical PGa star HD 19400. High-resolution, high signal-to-noise High Accuracy Radial-velocity Planet Searcher (HARPS) spectropolarimetric observations of HD 19400 were obtained at three different epochs in 2011 and 2013. For the first time, we present abundances of various elements determined using an ATLAS12 model, including the abundances of a number of elements not analysed by previous studies, such as Ne I, Ga II, and Xe II. Several lines of As II are also present in the spectra of HD 19400. To study the variability, we compared the behaviour of the line profiles of various elements. We report on the first detection of anomalous shapes of line profiles belonging to Mn and Hg, and the variability of the line profiles belonging to the elements Hg, P, Mn, Fe, and Ga. We suggest that the variability of the line profiles of these elements is caused by their non-uniform surface distribution, similar to the presence of chemical spots detected in HgMn stars. The search for the presence of a magnetic field was carried out using the moment technique and the Singular Value Decomposition (SVD) method. Our measurements of the magnetic field with the moment technique using 22 Mn II lines indicate the potential existence of a weak variable longitudinal magnetic field on the first epoch. The SVD method applied to the Mn II lines indicates 〈Bz〉 = −76 ± 25 G on the first epoch, and at the same epoch the SVD analysis of the observations using the Fe II lines shows 〈Bz〉 = −91 ± 35 G. The calculated false alarm probability values, 0.008 and 0.003, respectively, are above the value 10−3, indicating no detection.
Fil: Hubrig, S.. Leibniz-Institut fur Astrophysik Potsdam; Alemania
Fil: Castelli, F.. Istituto Nazionale di Astrofisica. Osservatorio Astronomico di Trieste; Italia
Fil: Gonzalez, Jorge Federico. Consejo Nacional de Investigaciones Cienti­ficas y Tecnicas. Centro Cientifico Tecnologico San Juan. Instituto de Ciencias Astronomicas de la Tierra y del Espacio; Argentina
Fil: Carroll, T. A. . Leibniz-Institut fur Astrophysik Potsdam; Alemania
Fil: Ilyin, I.. Leibniz-Institut fur Astrophysik Potsdam; Alemania
Fil: Schöller, M.. European Southern Observatory; Alemania
Fil: Drake, N. A.. St Petersburg State University. Sobolev Astronomical Institute; Rusia. Observatorio Nacional/MCTI; Brasil
Fil: Korhonen, H.. University of Turku. Finnish Centre for Astronomy with ESO; Finlandia
Fil: Briquet, M.. Université de Liège. Institut d’Astrophysique et de Geophysique; Bélgica
description The aim of this study is to carry out an abundance determination, to search for spectral variability and for the presence of a weak magnetic field in the typical PGa star HD 19400. High-resolution, high signal-to-noise High Accuracy Radial-velocity Planet Searcher (HARPS) spectropolarimetric observations of HD 19400 were obtained at three different epochs in 2011 and 2013. For the first time, we present abundances of various elements determined using an ATLAS12 model, including the abundances of a number of elements not analysed by previous studies, such as Ne I, Ga II, and Xe II. Several lines of As II are also present in the spectra of HD 19400. To study the variability, we compared the behaviour of the line profiles of various elements. We report on the first detection of anomalous shapes of line profiles belonging to Mn and Hg, and the variability of the line profiles belonging to the elements Hg, P, Mn, Fe, and Ga. We suggest that the variability of the line profiles of these elements is caused by their non-uniform surface distribution, similar to the presence of chemical spots detected in HgMn stars. The search for the presence of a magnetic field was carried out using the moment technique and the Singular Value Decomposition (SVD) method. Our measurements of the magnetic field with the moment technique using 22 Mn II lines indicate the potential existence of a weak variable longitudinal magnetic field on the first epoch. The SVD method applied to the Mn II lines indicates 〈Bz〉 = −76 ± 25 G on the first epoch, and at the same epoch the SVD analysis of the observations using the Fe II lines shows 〈Bz〉 = −91 ± 35 G. The calculated false alarm probability values, 0.008 and 0.003, respectively, are above the value 10−3, indicating no detection.
publishDate 2014
dc.date.none.fl_str_mv 2014-08
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/11336/4997
Hubrig, S.; Castelli, F.; Gonzalez, Jorge Federico; Carroll, T. A. ; Ilyin, I.; et al.; Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 442; 4; 8-2014; 3604-3615
0035-8711
url http://hdl.handle.net/11336/4997
identifier_str_mv Hubrig, S.; Castelli, F.; Gonzalez, Jorge Federico; Carroll, T. A. ; Ilyin, I.; et al.; Abundance analysis, spectral variability, and search for the presence of a magnetic field in the typical PGa star HD 19400; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 442; 4; 8-2014; 3604-3615
0035-8711
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://mnras.oxfordjournals.org/content/442/4/3604.abstract
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu1122
info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1406.1927v1
info:eu-repo/semantics/altIdentifier/arxiv/1406.1927v1
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 Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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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