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

被引：3

作者：

Calchetti, D. ^{[1
]}

Stangalini, M. ^{[2
]}

Jafarzadeh, S. ^{[1
,3
]}

Valori, G. ^{[1
]}

Albert, K. ^{[1
]}

Albelo Jorge, N. ^{[1
]}

Alvarez-Herrero, A. ^{[4
]}

Appourchaux, T. ^{[5
]}

Balaguer Jimenez, M. ^{[6
]}

Bellot Rubio, L. R. ^{[6
]}

Blanco Rodriguez, J. ^{[7
]}

Feller, A. ^{[1
]}

Gandorfer, A. ^{[1
]}

Germerott, D. ^{[1
]}

Gizon, L. ^{[1
,10
]}

Guerrero, L. ^{[1
]}

Gutierrez-Marques, P. ^{[1
]}

Hirzberger, J. ^{[1
]}

Kahil, F. ^{[1
]}

Kolleck, M. ^{[1
]}

Korpi-Lagg, A. ^{[1
]}

Moreno Vacas, A. ^{[6
]}

Orozco Suarez, D. ^{[6
]}

Perez-Grande, I. ^{[8
]}

Sanchis Kilders, E. ^{[7
]}

Schou, J. ^{[1
]}

Schuehle, U. ^{[1
]}

Sinjan, J. ^{[1
]}

Solanki, S. K. ^{[1
]}

Staub, J. ^{[1
]}

Strecker, H. ^{[6
]}

del Toro Iniesta, J. C. ^{[6
]}

Volkmer, R. ^{[9
]}

Woch, J. ^{[1
]}

机构：

[1] Max Planck Inst Sonnensystemforschung, Justus von Liebig Weg 3, D-37077 Gottingen, Germany

[2] Italian Space Agcy, ASI, Via Politecn Snc, I-00133 Rome, Italy

[3] Univ Oslo, Rosseland Ctr Solar Phys, POB 1029 Blindern, N-0315 Oslo, Norway

[4] Inst Nacl Tecn Aeroespacial, Carretera Ajalvir Km 4, Torrejon De Ardoz 28850, Spain

[5] Univ Paris Sud, Inst Astrophys Spatiale, UMR 8617, CNRS, Batiment 121, F-91405 Orsay, France

[6] CSIC, Inst Astrofis Andalucia IAA, Apartado Correos 3004, Granada 18080, Spain

[7] Univ Valencia, Catedrat Jose Beltran 2, Paterna 46980, Valencia, Spain

[8] Univ Politecn Madrid, Inst Univ Ignacio Riva, IDR, UPM, Plaza Cardenal Cisneros 3, Madrid 28040, Spain

[9] Leibniz Inst Sonnenphys, Schoneckstr 6, D-79104 Freiburg, Germany

[10] Georg August Univ Gottingen, Inst Astrophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2023年 / 674卷

关键词：

Sun: magnetic fields; Sun: photosphere; Sun: oscillations; II H FIBRILS; MAGNETIC-FIELDS; OSCILLATIONS; CHROMOSPHERE; PROPAGATION; SEISMOLOGY; INTENSITY; DYNAMICS; SO/PHI; PLASMA;

D O I：

10.1051/0004-6361/202245826

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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. The aim of the analysis is the detection of magnetohydrodynamic (MHD) wave modes in an active region by exploiting the capabilities of spectropolarimetric measurements. 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-? and phase-difference analyses are applied on line-of-sight velocity and circular polarization maps and other averaged quantities. 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. 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.

引用

页数：9

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