Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data

Contact. Spectropolarimetric reconstructions of the photospheric vector magnetic field are intrinsically limited by the 180° ambiguity in the orientation of the transverse component. So far, the removal of such an ambiguity has required assumptions about the properties of the photospheric field, whi...

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Autores: Valori, G., Calchetti, D., Moreno Vacas, A., Pariat, É., Solanki, S.K., Löschl, P., Hirzberger, J., Parenti, S., Albert, K., Albelo Jorge, N., Álvarez-Herrero, A., Appourchaux, T., Bellot Rubio, L.R., Blanco Rodríguez, J., Campos-Jara, A., Feller, A., Gandorfer, A., García Parejo, P., Germerott, D., Gizon, L., Gómez Cama, José María, Guerrero, L., Gutierrez-Marques, P., Kahil, F., Kolleck, M., Korpi-Lagg, A., Orozco Suárez, D., Pérez-Grande, I., Sanchis Kilders, E., Schou, J., Schühle, U., Sinjan, J., Staub, J., Strecker, H., Toro Iniesta, J.C. del, Volkmer, R., Woch, J.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/208267
Acesso em linha:https://hdl.handle.net/2445/208267
Access Level:acceso abierto
Palavra-chave:Sol
Fotosfera solar
Camps magnètics
Sun
Solar photosphere
Magnetic fields
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spelling Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT dataValori, G.Calchetti, D.Moreno Vacas, A.Pariat, É.Solanki, S.K.Löschl, P.Hirzberger, J.Parenti, S.Albert, K.Albelo Jorge, N.Álvarez-Herrero, A.Appourchaux, T.Bellot Rubio, L.R.Blanco Rodríguez, J.Campos-Jara, A.Feller, A.Gandorfer, A.García Parejo, P.Germerott, D.Gizon, L.Gómez Cama, José MaríaGuerrero, L.Gutierrez-Marques, P.Kahil, F.Kolleck, M.Korpi-Lagg, A.Orozco Suárez, D.Pérez-Grande, I.Sanchis Kilders, E.Schou, J.Schühle, U.Sinjan, J.Staub, J.Strecker, H.Toro Iniesta, J.C. delVolkmer, R.Woch, J.SolFotosfera solarCamps magnèticsSunSolar photosphereMagnetic fieldsContact. Spectropolarimetric reconstructions of the photospheric vector magnetic field are intrinsically limited by the 180° ambiguity in the orientation of the transverse component. So far, the removal of such an ambiguity has required assumptions about the properties of the photospheric field, which makes disambiguation methods model-dependent. Aims. The successful launch and operation of Solar Orbiter have made the removal of the 180° ambiguity possible solely using observations of the same location on the Sun obtained from two different vantage points. Methods. The basic idea is that the unambiguous line-of-sight component of the field measured from one vantage point will generally have a nonzero projection on the ambiguous transverse component measured by the second telescope, thereby determining the “true” orientation of the transverse field. Such an idea was developed and implemented as part of the stereoscopic disambiguation method (SDM), which was recently tested using numerical simulations. Results. In this work we present a first application of the SDM to data obtained by the High Resolution Telescope (HRT) on board Solar Orbiter during the March 2022 campaign, when the angle with Earth was 27 degrees. The method was successfully applied to remove the ambiguity in the transverse component of the vector magnetogram solely using observations (from HRT and from the Helioseismic and Magnetic Imager) for the first time. Conclusions. The SDM is proven to provide observation-only disambiguated vector magnetograms that are spatially homogeneous and consistent. A discussion on the sources of error that may limit the accuracy of the method, and strategies to remove them in future applications, is also presented.EDP Sciences2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/208267Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1051/0004-6361/202345859Astronomy & Astrophysics, 2023, vol. 677, p. 1-16https://doi.org/10.1051/0004-6361/202345859(c) The European Southern Observatory (ESO), 2023info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2082672026-05-27T06:46:51Z
dc.title.none.fl_str_mv Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data
title Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data
spellingShingle Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data
Valori, G.
Sol
Fotosfera solar
Camps magnètics
Sun
Solar photosphere
Magnetic fields
title_short Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data
title_full Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data
title_fullStr Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data
title_full_unstemmed Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data
title_sort Stereoscopic disambiguation of vector magnetograms: First applications to SO/PHI-HRT data
dc.creator.none.fl_str_mv Valori, G.
Calchetti, D.
Moreno Vacas, A.
Pariat, É.
Solanki, S.K.
Löschl, P.
Hirzberger, J.
Parenti, S.
Albert, K.
Albelo Jorge, N.
Álvarez-Herrero, A.
Appourchaux, T.
Bellot Rubio, L.R.
Blanco Rodríguez, J.
Campos-Jara, A.
Feller, A.
Gandorfer, A.
García Parejo, P.
Germerott, D.
Gizon, L.
Gómez Cama, José María
Guerrero, L.
Gutierrez-Marques, P.
Kahil, F.
Kolleck, M.
Korpi-Lagg, A.
Orozco Suárez, D.
Pérez-Grande, I.
Sanchis Kilders, E.
Schou, J.
Schühle, U.
Sinjan, J.
Staub, J.
Strecker, H.
Toro Iniesta, J.C. del
Volkmer, R.
Woch, J.
author Valori, G.
author_facet Valori, G.
Calchetti, D.
Moreno Vacas, A.
Pariat, É.
Solanki, S.K.
Löschl, P.
Hirzberger, J.
Parenti, S.
Albert, K.
Albelo Jorge, N.
Álvarez-Herrero, A.
Appourchaux, T.
Bellot Rubio, L.R.
Blanco Rodríguez, J.
Campos-Jara, A.
Feller, A.
Gandorfer, A.
García Parejo, P.
Germerott, D.
Gizon, L.
Gómez Cama, José María
Guerrero, L.
Gutierrez-Marques, P.
Kahil, F.
Kolleck, M.
Korpi-Lagg, A.
Orozco Suárez, D.
Pérez-Grande, I.
Sanchis Kilders, E.
Schou, J.
Schühle, U.
Sinjan, J.
Staub, J.
Strecker, H.
Toro Iniesta, J.C. del
Volkmer, R.
Woch, J.
author_role author
author2 Calchetti, D.
Moreno Vacas, A.
Pariat, É.
Solanki, S.K.
Löschl, P.
Hirzberger, J.
Parenti, S.
Albert, K.
Albelo Jorge, N.
Álvarez-Herrero, A.
Appourchaux, T.
Bellot Rubio, L.R.
Blanco Rodríguez, J.
Campos-Jara, A.
Feller, A.
Gandorfer, A.
García Parejo, P.
Germerott, D.
Gizon, L.
Gómez Cama, José María
Guerrero, L.
Gutierrez-Marques, P.
Kahil, F.
Kolleck, M.
Korpi-Lagg, A.
Orozco Suárez, D.
Pérez-Grande, I.
Sanchis Kilders, E.
Schou, J.
Schühle, U.
Sinjan, J.
Staub, J.
Strecker, H.
Toro Iniesta, J.C. del
Volkmer, R.
Woch, J.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Sol
Fotosfera solar
Camps magnètics
Sun
Solar photosphere
Magnetic fields
topic Sol
Fotosfera solar
Camps magnètics
Sun
Solar photosphere
Magnetic fields
description Contact. Spectropolarimetric reconstructions of the photospheric vector magnetic field are intrinsically limited by the 180° ambiguity in the orientation of the transverse component. So far, the removal of such an ambiguity has required assumptions about the properties of the photospheric field, which makes disambiguation methods model-dependent. Aims. The successful launch and operation of Solar Orbiter have made the removal of the 180° ambiguity possible solely using observations of the same location on the Sun obtained from two different vantage points. Methods. The basic idea is that the unambiguous line-of-sight component of the field measured from one vantage point will generally have a nonzero projection on the ambiguous transverse component measured by the second telescope, thereby determining the “true” orientation of the transverse field. Such an idea was developed and implemented as part of the stereoscopic disambiguation method (SDM), which was recently tested using numerical simulations. Results. In this work we present a first application of the SDM to data obtained by the High Resolution Telescope (HRT) on board Solar Orbiter during the March 2022 campaign, when the angle with Earth was 27 degrees. The method was successfully applied to remove the ambiguity in the transverse component of the vector magnetogram solely using observations (from HRT and from the Helioseismic and Magnetic Imager) for the first time. Conclusions. The SDM is proven to provide observation-only disambiguated vector magnetograms that are spatially homogeneous and consistent. A discussion on the sources of error that may limit the accuracy of the method, and strategies to remove them in future applications, is also presented.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/208267
url https://hdl.handle.net/2445/208267
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1051/0004-6361/202345859
Astronomy & Astrophysics, 2023, vol. 677, p. 1-16
https://doi.org/10.1051/0004-6361/202345859
dc.rights.none.fl_str_mv (c) The European Southern Observatory (ESO), 2023
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The European Southern Observatory (ESO), 2023
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300724

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