Observation and Modeling of the Circular Polarization of the Cr i Magnetic-field-induced Transition at 533.03 nm
We study the circular polarization of the magnetic-field-induced transition (MIT) between the 3 d ^5 ( ^6 S )4 d ^7 D _2 and 3 d ^5 ( ^6 S )4 p ^7 P _4 ° states of Cr i at 533.03 nm (wavelength in air). The fractional circular polarization V / I of this spectral line resulting from the solution of t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad2fbb |
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| author | Hao Li Tanausú del Pino Alemán Javier Trujillo Bueno Franziska Zeuner |
| author_facet | Hao Li Tanausú del Pino Alemán Javier Trujillo Bueno Franziska Zeuner |
| author_sort | Hao Li |
| collection | DOAJ |
| description | We study the circular polarization of the magnetic-field-induced transition (MIT) between the 3 d ^5 ( ^6 S )4 d ^7 D _2 and 3 d ^5 ( ^6 S )4 p ^7 P _4 ° states of Cr i at 533.03 nm (wavelength in air). The fractional circular polarization V / I of this spectral line resulting from the solution of the radiation transfer problem in a sunspot model permeated by a homogeneous magnetic field of 3 kG shows amplitudes of about 2%. Spectropolarimetric observations of two sunspots were obtained with the Zurich Imaging Polarimeter-3 at the Istituto ricerche solari Aldo e Cele Daccò observatory in Locarno, Switzerland. The observed V / I profiles show approximately antisymmetrical shapes with an amplitude of around 0.1% and 0.2% for the two sunspots. The center of this profile coincides with the wavelengths predicted for the abovementioned MIT. We apply an inversion code to the spectropolarimetric data of the Cr i -permitted lines at 532.91 and 532.98 nm, as well as to the MIT line at 533.03 nm, to infer a stratification of the emitting atmosphere. We compare the V / I profiles synthesized in the inferred atmosphere models with the observations, showing that the observed signal likely corresponds to the MIT line. |
| first_indexed | 2024-04-24T15:18:48Z |
| format | Article |
| id | doaj.art-00d0568351364844b36f41472101bf37 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-04-24T15:18:48Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-00d0568351364844b36f41472101bf372024-04-02T08:29:16ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01964215510.3847/1538-4357/ad2fbbObservation and Modeling of the Circular Polarization of the Cr i Magnetic-field-induced Transition at 533.03 nmHao Li0https://orcid.org/0000-0001-5612-4457Tanausú del Pino Alemán1https://orcid.org/0000-0003-1465-5692Javier Trujillo Bueno2https://orcid.org/0000-0001-5131-4139Franziska Zeuner3https://orcid.org/0000-0002-3594-2247Instituto de Astrofísica de Canarias , E-38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna , E-38206 La Laguna, Tenerife, SpainInstituto de Astrofísica de Canarias , E-38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna , E-38206 La Laguna, Tenerife, SpainInstituto de Astrofísica de Canarias , E-38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna , E-38206 La Laguna, Tenerife, Spain; Consejo Superior de Investigaciones Científicas , SpainIstituto ricerche solari Aldo e Cele Daccò (IRSOL), Faculty of Informatics, Universitá della Svizzera italiana , CH-6605 Locarno, SwitzerlandWe study the circular polarization of the magnetic-field-induced transition (MIT) between the 3 d ^5 ( ^6 S )4 d ^7 D _2 and 3 d ^5 ( ^6 S )4 p ^7 P _4 ° states of Cr i at 533.03 nm (wavelength in air). The fractional circular polarization V / I of this spectral line resulting from the solution of the radiation transfer problem in a sunspot model permeated by a homogeneous magnetic field of 3 kG shows amplitudes of about 2%. Spectropolarimetric observations of two sunspots were obtained with the Zurich Imaging Polarimeter-3 at the Istituto ricerche solari Aldo e Cele Daccò observatory in Locarno, Switzerland. The observed V / I profiles show approximately antisymmetrical shapes with an amplitude of around 0.1% and 0.2% for the two sunspots. The center of this profile coincides with the wavelengths predicted for the abovementioned MIT. We apply an inversion code to the spectropolarimetric data of the Cr i -permitted lines at 532.91 and 532.98 nm, as well as to the MIT line at 533.03 nm, to infer a stratification of the emitting atmosphere. We compare the V / I profiles synthesized in the inferred atmosphere models with the observations, showing that the observed signal likely corresponds to the MIT line.https://doi.org/10.3847/1538-4357/ad2fbbSolar magnetic fieldsSolar photosphereAtomic spectroscopyRadiative transferSpectropolarimetry |
| spellingShingle | Hao Li Tanausú del Pino Alemán Javier Trujillo Bueno Franziska Zeuner Observation and Modeling of the Circular Polarization of the Cr i Magnetic-field-induced Transition at 533.03 nm The Astrophysical Journal Solar magnetic fields Solar photosphere Atomic spectroscopy Radiative transfer Spectropolarimetry |
| title | Observation and Modeling of the Circular Polarization of the Cr i Magnetic-field-induced Transition at 533.03 nm |
| title_full | Observation and Modeling of the Circular Polarization of the Cr i Magnetic-field-induced Transition at 533.03 nm |
| title_fullStr | Observation and Modeling of the Circular Polarization of the Cr i Magnetic-field-induced Transition at 533.03 nm |
| title_full_unstemmed | Observation and Modeling of the Circular Polarization of the Cr i Magnetic-field-induced Transition at 533.03 nm |
| title_short | Observation and Modeling of the Circular Polarization of the Cr i Magnetic-field-induced Transition at 533.03 nm |
| title_sort | observation and modeling of the circular polarization of the cr i magnetic field induced transition at 533 03 nm |
| topic | Solar magnetic fields Solar photosphere Atomic spectroscopy Radiative transfer Spectropolarimetry |
| url | https://doi.org/10.3847/1538-4357/ad2fbb |
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