Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere : First results from PHI on board Solar Orbiter

D. Calchetti; M. Stangalini; S. Jafarzadeh; G. Valori; K. Albert; N. Albelo Jorge; A. Alvarez-Herrero; T. Appourchaux; M. Balaguer Jiménez; L. R. Bellot Rubio; J. Blanco Rodríguez; A. Feller; A. Gandorfer; D. Germerott; L. Gizon; L. Guerrero; P. Gutierrez-Marques; J. Hirzberger; F. Kahil; M. Kolleck; A. Korpi-Lagg; A. Moreno Vacas; D. Orozco Suárez; I. Pérez-Grande; E. Sanchis Kilders; J. Schou; U. Schühle; J. Sinjan; S. K. Solanki; J. Staub; H. Strecker; J. C. Del Toro Iniesta; R. Volkmer; J. Woch

doi:10.1051/0004-6361/202245826

Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere : First results from PHI on board Solar Orbiter

D. Calchetti
, M. Stangalini
, S. Jafarzadeh
, G. Valori
, K. Albert
, N. Albelo Jorge
, A. Alvarez-Herrero
, T. Appourchaux
, M. Balaguer Jiménez
, L. R. Bellot Rubio
, J. Blanco Rodríguez
, A. Feller
, A. Gandorfer
, D. Germerott
, L. Gizon
, L. Guerrero
, P. Gutierrez-Marques
, J. Hirzberger
, F. Kahil
, M. Kolleck

A. Korpi-Lagg, A. Moreno Vacas, D. Orozco Suárez, I. Pérez-Grande, E. Sanchis Kilders, J. Schou, U. Schühle, J. Sinjan, S. K. Solanki, J. Staub, H. Strecker, J. C. Del Toro Iniesta, R. Volkmer, J. Woch

Not published at Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

4 Citations (Scopus)

Abstract

Context. In November 2021, Solar Orbiter started its nominal mission phase. The remote-sensing instruments on board the spacecraft acquired scientific data during three observing windows surrounding the perihelion of the first orbit of this phase. Aims. The aim of the analysis is the detection of magnetohydrodynamic (MHD) wave modes in an active region by exploiting the capabilities of spectropolarimetric measurements. Mthods. The High Resolution Telescope (HRT) of the Polarimetric and Helioseismic Imager (SO/PHI) on board the Solar Orbiter acquired a high-cadence data set of an active region. This is studied in the paper. B-ω and phase-difference analyses are applied on line-of-sight velocity and circular polarization maps and other averaged quantities. Results. We find that several MHD modes at different frequencies are excited in all analysed structures. The leading sunspot shows a linear dependence of the phase lag on the angle between the magnetic field and the line of sight of the observer in its penumbra. The magnetic pore exhibits global resonances at several frequencies, which are also excited by different wave modes. Conclusions. The SO/PHI measurements clearly confirm the presence of magnetic and velocity oscillations that are compatible with one or more MHD wave modes in pores and a sunspot. Improvements in modelling are still necessary to interpret the relation between the fluctuations of different diagnostics.

Original language	English
Article number	A109
Journal	Astronomy & Astrophysics
Volume	674
DOIs	https://doi.org/10.1051/0004-6361/202245826
Publication status	Published - 1 Jun 2023
MoE publication type	A1 Journal article-refereed

Funding

D. C. would like to thank H. N. Smitha for her valuable inputs. Solar Orbiter is a space mission of international collaboration between ESA and NASA, operated by ESA. We are grateful to the ESA SOC and MOC teams for their support. The German contribution to SO/PHI is funded by the BMWi through DLR and by MPG central funds. The Spanish contribution is funded by AEI/MCIN/10.13039/501100011033/ (RTI2018-096886-C5, PID2021-125325OB-C5, PCI2022-135009-2) and ERDF “A way of making Europe”; “Center of Excellence Severo Ochoa” awards to IAA-CSIC (SEV-2017-0709, CEX2021-001131-S); and a Ramón y Cajal fellowship awarded to DOS. The French contribution is funded by CNES. The authors wish to acknowledge scientific discussions with the Waves in the Lower Solar Atmosphere (WaLSA; https://WaLSA.team) team, which has been supported by the Research Council of Norway (project no. 262622), The Royal Society (award no. Hooke18b/SCTM), and the International Space Science Institute (ISSI Team 502).

Keywords

Sun: magnetic fields
Sun: oscillations
Sun: photosphere

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10.1051/0004-6361/202245826

Cite this

Calchetti, D., Stangalini, M., Jafarzadeh, S., Valori, G., Albert, K., Albelo Jorge, N., Alvarez-Herrero, A., Appourchaux, T., Balaguer Jiménez, M., Bellot Rubio, L. R., Blanco Rodríguez, J., Feller, A., Gandorfer, A., Germerott, D., Gizon, L., Guerrero, L., Gutierrez-Marques, P., Hirzberger, J., Kahil, F., ... Woch, J. (2023). Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere : First results from PHI on board Solar Orbiter. Astronomy & Astrophysics, 674, Article A109. https://doi.org/10.1051/0004-6361/202245826

@article{ef147100ab3441f78c4dc0cb448b7db1,

title = "Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere : First results from PHI on board Solar Orbiter",

abstract = "Context. In November 2021, Solar Orbiter started its nominal mission phase. The remote-sensing instruments on board the spacecraft acquired scientific data during three observing windows surrounding the perihelion of the first orbit of this phase. Aims. The aim of the analysis is the detection of magnetohydrodynamic (MHD) wave modes in an active region by exploiting the capabilities of spectropolarimetric measurements. Mthods. The High Resolution Telescope (HRT) of the Polarimetric and Helioseismic Imager (SO/PHI) on board the Solar Orbiter acquired a high-cadence data set of an active region. This is studied in the paper. B-ω and phase-difference analyses are applied on line-of-sight velocity and circular polarization maps and other averaged quantities. Results. We find that several MHD modes at different frequencies are excited in all analysed structures. The leading sunspot shows a linear dependence of the phase lag on the angle between the magnetic field and the line of sight of the observer in its penumbra. The magnetic pore exhibits global resonances at several frequencies, which are also excited by different wave modes. Conclusions. The SO/PHI measurements clearly confirm the presence of magnetic and velocity oscillations that are compatible with one or more MHD wave modes in pores and a sunspot. Improvements in modelling are still necessary to interpret the relation between the fluctuations of different diagnostics.",

keywords = "Sun: magnetic fields, Sun: oscillations, Sun: photosphere",

author = "D. Calchetti and M. Stangalini and S. Jafarzadeh and G. Valori and K. Albert and \{Albelo Jorge\}, N. and A. Alvarez-Herrero and T. Appourchaux and \{Balaguer Jim{\'e}nez\}, M. and \{Bellot Rubio\}, \{L. R.\} and \{Blanco Rodr{\'i}guez\}, J. and A. Feller and A. Gandorfer and D. Germerott and L. Gizon and L. Guerrero and P. Gutierrez-Marques and J. Hirzberger and F. Kahil and M. Kolleck and A. Korpi-Lagg and \{Moreno Vacas\}, A. and \{Orozco Su{\'a}rez\}, D. and I. P{\'e}rez-Grande and \{Sanchis Kilders\}, E. and J. Schou and U. Sch{\"u}hle and J. Sinjan and Solanki, \{S. K.\} and J. Staub and H. Strecker and \{Del Toro Iniesta\}, \{J. C.\} and R. Volkmer and J. Woch",

note = "Funding Information: D. C. would like to thank H. N. Smitha for her valuable inputs. Solar Orbiter is a space mission of international collaboration between ESA and NASA, operated by ESA. We are grateful to the ESA SOC and MOC teams for their support. The German contribution to SO/PHI is funded by the BMWi through DLR and by MPG central funds. The Spanish contribution is funded by AEI/MCIN/10.13039/501100011033/ (RTI2018-096886-C5, PID2021-125325OB-C5, PCI2022-135009-2) and ERDF “A way of making Europe”; “Center of Excellence Severo Ochoa” awards to IAA-CSIC (SEV-2017-0709, CEX2021-001131-S); and a Ram{\'o}n y Cajal fellowship awarded to DOS. The French contribution is funded by CNES. The authors wish to acknowledge scientific discussions with the Waves in the Lower Solar Atmosphere (WaLSA; https://WaLSA.team) team, which has been supported by the Research Council of Norway (project no. 262622), The Royal Society (award no. Hooke18b/SCTM), and the International Space Science Institute (ISSI Team 502). Publisher Copyright: {\textcopyright} The Authors 2023.",

year = "2023",

month = jun,

day = "1",

doi = "10.1051/0004-6361/202245826",

language = "English",

volume = "674",

journal = "Astronomy \& Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Calchetti, D, Stangalini, M, Jafarzadeh, S, Valori, G, Albert, K, Albelo Jorge, N, Alvarez-Herrero, A, Appourchaux, T, Balaguer Jiménez, M, Bellot Rubio, LR, Blanco Rodríguez, J, Feller, A, Gandorfer, A, Germerott, D, Gizon, L, Guerrero, L, Gutierrez-Marques, P, Hirzberger, J, Kahil, F, Kolleck, M, Korpi-Lagg, A, Moreno Vacas, A, Orozco Suárez, D, Pérez-Grande, I, Sanchis Kilders, E, Schou, J, Schühle, U, Sinjan, J, Solanki, SK, Staub, J, Strecker, H, Del Toro Iniesta, JC, Volkmer, R & Woch, J 2023, 'Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere : First results from PHI on board Solar Orbiter', Astronomy & Astrophysics, vol. 674, A109. https://doi.org/10.1051/0004-6361/202245826

TY - JOUR

T1 - Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere : First results from PHI on board Solar Orbiter

AU - Calchetti, D.

AU - Stangalini, M.

AU - Jafarzadeh, S.

AU - Valori, G.

AU - Albert, K.

AU - Albelo Jorge, N.

AU - Alvarez-Herrero, A.

AU - Appourchaux, T.

AU - Balaguer Jiménez, M.

AU - Bellot Rubio, L. R.

AU - Blanco Rodríguez, J.

AU - Feller, A.

AU - Gandorfer, A.

AU - Germerott, D.

AU - Gizon, L.

AU - Guerrero, L.

AU - Gutierrez-Marques, P.

AU - Hirzberger, J.

AU - Kahil, F.

AU - Kolleck, M.

AU - Korpi-Lagg, A.

AU - Moreno Vacas, A.

AU - Orozco Suárez, D.

AU - Pérez-Grande, I.

AU - Sanchis Kilders, E.

AU - Schou, J.

AU - Schühle, U.

AU - Sinjan, J.

AU - Solanki, S. K.

AU - Staub, J.

AU - Strecker, H.

AU - Del Toro Iniesta, J. C.

AU - Volkmer, R.

AU - Woch, J.

N1 - Funding Information: D. C. would like to thank H. N. Smitha for her valuable inputs. Solar Orbiter is a space mission of international collaboration between ESA and NASA, operated by ESA. We are grateful to the ESA SOC and MOC teams for their support. The German contribution to SO/PHI is funded by the BMWi through DLR and by MPG central funds. The Spanish contribution is funded by AEI/MCIN/10.13039/501100011033/ (RTI2018-096886-C5, PID2021-125325OB-C5, PCI2022-135009-2) and ERDF “A way of making Europe”; “Center of Excellence Severo Ochoa” awards to IAA-CSIC (SEV-2017-0709, CEX2021-001131-S); and a Ramón y Cajal fellowship awarded to DOS. The French contribution is funded by CNES. The authors wish to acknowledge scientific discussions with the Waves in the Lower Solar Atmosphere (WaLSA; https://WaLSA.team) team, which has been supported by the Research Council of Norway (project no. 262622), The Royal Society (award no. Hooke18b/SCTM), and the International Space Science Institute (ISSI Team 502). Publisher Copyright: © The Authors 2023.

PY - 2023/6/1

Y1 - 2023/6/1

N2 - Context. In November 2021, Solar Orbiter started its nominal mission phase. The remote-sensing instruments on board the spacecraft acquired scientific data during three observing windows surrounding the perihelion of the first orbit of this phase. Aims. The aim of the analysis is the detection of magnetohydrodynamic (MHD) wave modes in an active region by exploiting the capabilities of spectropolarimetric measurements. Mthods. The High Resolution Telescope (HRT) of the Polarimetric and Helioseismic Imager (SO/PHI) on board the Solar Orbiter acquired a high-cadence data set of an active region. This is studied in the paper. B-ω and phase-difference analyses are applied on line-of-sight velocity and circular polarization maps and other averaged quantities. Results. We find that several MHD modes at different frequencies are excited in all analysed structures. The leading sunspot shows a linear dependence of the phase lag on the angle between the magnetic field and the line of sight of the observer in its penumbra. The magnetic pore exhibits global resonances at several frequencies, which are also excited by different wave modes. Conclusions. The SO/PHI measurements clearly confirm the presence of magnetic and velocity oscillations that are compatible with one or more MHD wave modes in pores and a sunspot. Improvements in modelling are still necessary to interpret the relation between the fluctuations of different diagnostics.

AB - Context. In November 2021, Solar Orbiter started its nominal mission phase. The remote-sensing instruments on board the spacecraft acquired scientific data during three observing windows surrounding the perihelion of the first orbit of this phase. Aims. The aim of the analysis is the detection of magnetohydrodynamic (MHD) wave modes in an active region by exploiting the capabilities of spectropolarimetric measurements. Mthods. The High Resolution Telescope (HRT) of the Polarimetric and Helioseismic Imager (SO/PHI) on board the Solar Orbiter acquired a high-cadence data set of an active region. This is studied in the paper. B-ω and phase-difference analyses are applied on line-of-sight velocity and circular polarization maps and other averaged quantities. Results. We find that several MHD modes at different frequencies are excited in all analysed structures. The leading sunspot shows a linear dependence of the phase lag on the angle between the magnetic field and the line of sight of the observer in its penumbra. The magnetic pore exhibits global resonances at several frequencies, which are also excited by different wave modes. Conclusions. The SO/PHI measurements clearly confirm the presence of magnetic and velocity oscillations that are compatible with one or more MHD wave modes in pores and a sunspot. Improvements in modelling are still necessary to interpret the relation between the fluctuations of different diagnostics.

KW - Sun: magnetic fields

KW - Sun: oscillations

KW - Sun: photosphere

UR - https://www.scopus.com/pages/publications/85163175148

U2 - 10.1051/0004-6361/202245826

DO - 10.1051/0004-6361/202245826

M3 - Article

AN - SCOPUS:85163175148

SN - 0004-6361

VL - 674

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - A109

ER -

Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere : First results from PHI on board Solar Orbiter

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Keywords

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