The ratio of horizontal to vertical displacement in solar oscillations 
estimated from combined SO/PHI and SDO/HMI observations

Schou, J.; 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.; Fiethe, B.; 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.; Gizon, L.; Grauf, B.; Heerlein, K.; Korpi-Lagg, A.; López Jiménez, A.; Maue, T.; Meller, R.; Moreno Vacas, A.; Müller, R.; Nakai, E.; Schmidt, W.; Sinjan, J.; Staub, Jan; Strecker, H.; Torralbo, I.; Valori, G.

doi:10.1051/0004-6361/202345946

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Journal Article

The ratio of horizontal to vertical displacement in solar oscillations estimated from combined SO/PHI and SDO/HMI observations

MPS-Authors

/persons/resource/persons129829

Schou, J.
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/persons103925

Gizon, L.
Department Solar and Stellar Interiors, 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/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...673A..84S
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Citation

Schou, J., Hirzberger, J., Orozco Suárez, D., Albert, K., Albelo, J. N., Appourchaux, T., et al. (2023). The ratio of horizontal to vertical displacement in solar oscillations estimated from combined SO/PHI and SDO/HMI observations. Astronomy and Astrophysics, 673, A84. doi:10.1051/0004-6361/202345946.

Cite as: https://hdl.handle.net/21.11116/0000-000D-90B0-8

Abstract

In order to make accurate inferences about the solar interior using helioseismology, it is essential to understand all the relevant physical effects on the observations. One effect to understand is the (complex-valued) ratio of the horizontal to vertical displacement of the p- and f-modes at the height at which they are observed. Unfortunately, it is impossible to measure this ratio directly from a single vantage point, and it has been difficult to disentangle observationally from other effects. In this paper we attempt to measure the ratio directly using 7.5 h of simultaneous observations from the Polarimetric and Helioseismic Imager on board Solar Orbiter and the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory. While image geometry problems make it difficult to determine the exact ratio, it appears to agree well with that expected from adiabatic oscillations in a standard solar model. On the other hand it does not agree with a commonly used approximation, indicating that this approximation should not be used in helioseismic analyses. In addition, the ratio appears to be real-valued.