Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profiles

Context. The Mg I b2 line at 5173 Å is primarily magnetically sensitive to heights between the mid photosphere and the low chromosphere, a region that has not been sufficiently explored in the solar atmosphere but is crucial for understanding the magnetic coupling between the two layers. New generat...

Descripción completa

Detalles Bibliográficos
Autores: Siu-Tapia, A., Bellot Rubio, Luis R., Orozco Suárez, David, Gafeira, Ricardo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/389788
Acceso en línea:http://hdl.handle.net/10261/389788
Access Level:acceso abierto
Palabra clave:Polarization
Sun: chromosphere
Sun: magnetic fields
id ES_b9c156c19fbe90ae1b048e127060141e
oai_identifier_str oai:digital.csic.es:10261/389788
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profiles
title Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profiles
spellingShingle Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profiles
Siu-Tapia, A.
Polarization
Sun: chromosphere
Sun: magnetic fields
title_short Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profiles
title_full Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profiles
title_fullStr Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profiles
title_full_unstemmed Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profiles
title_sort Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profiles
dc.creator.none.fl_str_mv Siu-Tapia, A.
Bellot Rubio, Luis R.
Orozco Suárez, David
Gafeira, Ricardo
author Siu-Tapia, A.
author_facet Siu-Tapia, A.
Bellot Rubio, Luis R.
Orozco Suárez, David
Gafeira, Ricardo
author_role author
author2 Bellot Rubio, Luis R.
Orozco Suárez, David
Gafeira, Ricardo
author2_role author
author
author
dc.contributor.none.fl_str_mv Junta de Andalucía
Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
Fundação para a Ciência e a Tecnologia (Portugal)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Polarization
Sun: chromosphere
Sun: magnetic fields
topic Polarization
Sun: chromosphere
Sun: magnetic fields
description Context. The Mg I b2 line at 5173 Å is primarily magnetically sensitive to heights between the mid photosphere and the low chromosphere, a region that has not been sufficiently explored in the solar atmosphere but is crucial for understanding the magnetic coupling between the two layers. New generation solar observatories, both space-borne and ground-based, are now performing polarimetric observations of this spectral line, enabling simultaneous measurements with multiple spectral lines. This allows for detailed studies of the magnetism around the temperature minimum region of the solar atmosphere at high spatial, temporal, and spectral resolutions.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/389788
url http://hdl.handle.net/10261/389788
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-125325OB-C51
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/CEX2021-001131-S
http://dx.doi.org/10.1051/0004-6361/202453232
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869417799808450560
spelling Diagnosing the solar atmosphere through the Mg I b2 5173 Å line: II. Morphological classification of the intensity and circular polarization profilesSiu-Tapia, A.Bellot Rubio, Luis R.Orozco Suárez, DavidGafeira, RicardoPolarizationSun: chromosphereSun: magnetic fieldsContext. The Mg I b2 line at 5173 Å is primarily magnetically sensitive to heights between the mid photosphere and the low chromosphere, a region that has not been sufficiently explored in the solar atmosphere but is crucial for understanding the magnetic coupling between the two layers. New generation solar observatories, both space-borne and ground-based, are now performing polarimetric observations of this spectral line, enabling simultaneous measurements with multiple spectral lines. This allows for detailed studies of the magnetism around the temperature minimum region of the solar atmosphere at high spatial, temporal, and spectral resolutions.Aims. We present a first classification of the Stokes I and V profiles of the Mg I b2 line using high spatial resolution observations from the Swedish 1-m Solar Telescope.Methods. We used the Euclidean distance to perform a morphological classification of the intensity and circular polarization profiles of the Mg I b2 line. The physical properties of the resulting classes were analyzed using classical inference methods. Additionally, we present a two-line full-Stokes inversion of the representative profiles in which the Mg I b2 line is treated fully under non-local thermodynamic equilibrium (NLTE) conditions, while the Fe I 6173 Å line is simultaneously inverted under LTE assumptions to provide photospheric constraints. This approach offers insights into the temperature stratification and other physical gradients involved in the formation of the different profile morphologies.Results. The intensity and polarization profiles of the Mg I b2 line show clear spectral signatures depending on the magnetic environment and the variety of physical processes occurring in the different solar magnetic regimes within the line formation range. We found nine classes of Stokes V profiles and 16 classes of Stokes I profiles in our Mg I b2 dataset. These classes can be further grouped into families based on shared characteristics, physical properties, and location.Conclusions. Our classification provides important information on the different environments and processes occurring in the solar atmosphere around the temperature minimum region. It is also relevant for improving the performance of NLTE inversions.© The Authors 2025We would like to thank the anonymous referee for important suggestions that greatly improved the content of this work. We also thank Edgar Carlin for valuable discussions and useful suggestions on this work and Mats G. Löfdahl for his assistance during the data reduction. A.S.T. has been funded by Consejería de Transformación Económica, Industria, Conocimiento y Universidades from Junta de Andalucía through grant POSTDOC-21-00832. This work was supported by the Spanish Ministry of Science and Innovation through the project PID2021-125325OB-C51. The authors acknowledge financial support from the Severo Ochoa grant CEX2021-001131-S funded by MICIU/AEI/10.13039/501100011033. R.G. acknowledges the support by Fundação para a Ciência e a Tecnologia (FCT) through the research grants UIDB/04434/2020 and UIDP/04434/2020. The Swedish 1 m Solar Telescope is operated on the island of La Palma by the Institute for Solar Physics of Stockholm University in the Spanish Observatory del Roque de los Muchachos of the Instituto de Astrofísica de Canarias. The Institute for Solar Physics is supported by a grant for research infrastructures of national importance from the Swedish Research Council (registration number 2017-00625).With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (CEX2021-001131-S).Peer reviewedEDP SciencesJunta de AndalucíaMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)Fundação para a Ciência e a Tecnologia (Portugal)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/389788reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-125325OB-C51info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/CEX2021-001131-Shttp://dx.doi.org/10.1051/0004-6361/202453232Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3897882026-05-22T06:33:51Z
score 15,811543

Similares en LA Referencia