Direct assessment of SDO/HMI helioseismology of active regions on the Sun's far 
side using SO/PHI magnetograms

Yang, D.; Gizon, L.; Barucq, H.; Hirzberger, J.; Orozco Suárez, D.; Albert, K.; Albelo, Jorge N.; Appourchaux, T.; Alvarez-Herrero, A.; Blanco Rodríguez, J.; Gandorfer, A.; Germerott, D.; Guerrero, Lucas; Gutierrez-Marques, P.; Kahil, F.; Kolleck, M.; Solanki, S. K.; del Toro Iniesta, J. C.; Volkmer, R.; Woch, J.; Pérez-Grande, I.; Sanchis Kilders, E.; Balaguer Jiménez, M.; Bellot Rubio, L. R.; Calchetti, D.; Carmona, M.; Deutsch, W.; Feller, A.; Fernandez-Rico, German; Fernández-Medina, A.; García Parejo, P.; Gasent Blesa, J. L.; Grauf, B.; Heerlein, K.; Korpi-Lagg, A.; Lange, T.; López Jiménez, A.; Maue, T.; Meller, R.; Moreno Vacas, A.; Müller, R.; Nakai, E.; Schmidt, W.; Schou, J.; Schühle, U.; Sinjan, J.; Staub, Jan; Strecker, H.; Torralbo, I.; Valori, G.

doi:10.1051/0004-6361/202346030

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学術論文

Direct assessment of SDO/HMI helioseismology of active regions on the Sun's far side using SO/PHI magnetograms

MPS-Authors

/persons/resource/persons217577

Yang, D.
Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103925

Gizon, L.
Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103966

Hirzberger, J.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons231801

Albert, K.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons291346

Albelo, Jorge N.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103917

Gandorfer, A.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103923

Germerott, D.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons291348

Guerrero, Lucas
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103944

Gutierrez-Marques, P.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons209278

Kahil, F.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104018

Kolleck, M.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104218

Solanki, S. K.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104296

Woch, J.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons283892

Calchetti, D.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103886

Deutsch, W.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103910

Feller, A.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons291350

Fernandez-Rico, German
Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103935

Grauf, B.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103956

Heerlein, K.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104044

Korpi-Lagg, A.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104087

Meller, R.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons129829

Schou, J.
Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104197

Schühle, U.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons292210

Sinjan, J.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104226

Staub, Jan
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons274392

Valori, G.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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https://ui.adsabs.harvard.edu/abs/2023A&A...674A.183Y
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引用

Yang, D., Gizon, L., Barucq, H., Hirzberger, J., Orozco Suárez, D., Albert, K., Albelo, J. N., Appourchaux, T., Alvarez-Herrero, A., Blanco Rodríguez, J., Gandorfer, A., Germerott, D., Guerrero, L., Gutierrez-Marques, P., Kahil, F., Kolleck, M., Solanki, S. K., del Toro Iniesta, J. C., Volkmer, R., Woch, J., Pérez-Grande, I., Sanchis Kilders, E., Balaguer Jiménez, M., Bellot Rubio, L. R., Calchetti, D., Carmona, M., Deutsch, W., Feller, A., Fernandez-Rico, G., Fernández-Medina, A., García Parejo, P., Gasent Blesa, J. L., Grauf, B., Heerlein, K., Korpi-Lagg, A., Lange, T., López Jiménez, A., Maue, T., Meller, R., Moreno Vacas, A., Müller, R., Nakai, E., Schmidt, W., Schou, J., Schühle, U., Sinjan, J., Staub, J., Strecker, H., Torralbo, I., & Valori, G. (2023). Direct assessment of SDO/HMI helioseismology of active regions on the Sun's far side using SO/PHI magnetograms. Astronomy and Astrophysics, 674, A183. doi:10.1051/0004-6361/202346030.

引用: https://hdl.handle.net/21.11116/0000-000D-864D-6

要旨

Context. Earth-side observations of solar p modes can be used to image and monitor magnetic activity on the Sun's far side. In this work, we use magnetograms of the far side obtained by the Polarimetric and Helioseismic Imager (PHI) on board Solar Orbiter (SO) to directly assess the validity of far-side helioseismic holography for the first time.
Aims: We wish to co-locate the positions of active regions in helioseismic images and magnetograms and to calibrate the helioseismic measurements in terms of the magnetic field strength.
Methods: We identified three magnetograms displaying a total of six active regions on the far side from 18 November 2020, 3 October 2021, and 3 February 2022. The first two dates are from the SO cruise phase and the third is from the beginning of the nominal operation phase. We computed contemporaneous seismic phase maps for these three dates using helioseismic holography applied to the time series of Dopplergrams from the Helioseismic and Magnetic Imager (HMI) at the Solar Dynamics Observatory (SDO).
Results: Among the six active regions seen in SO/PHI magnetograms, five of them are identified on the seismic maps at almost the same positions as on the magnetograms. One region is too weak to be detected above the seismic noise. To calibrate the seismic maps, we fit a linear relationship between the seismic phase shifts and the unsigned line-of-sight magnetic field averaged over the active region areas extracted from the SO/PHI magnetograms.
Conclusions: SO/PHI provides the strongest evidence so far that helioseismic imaging is able to provide reliable information on active regions on the far side, including their positions, areas, and the mean unsigned magnetic field.