Large scale coherent magnetohydrodynamic oscillations in a sunspot

Stangalini, M.; Verth, G.; Fedun, V.; Aldhafeeri, A. A.; Jess, D. B.; Jafarzadeh, S.; Keys, P. H.; Fleck, B.; Terradas, J.; Murabito, M.; Ermolli, I.; Soler, R.; Giorgi, F.; MacBride, C. D.

doi:10.1038/s41467-022-28136-8

アイテム詳細

登録内容を編集ファイル形式で保存

一時保存へ追加

タグ情報を表示リリース履歴を表示詳細要約

公開

学術論文

Large scale coherent magnetohydrodynamic oscillations in a sunspot

MPS-Authors

/persons/resource/persons104225

Stangalini, M.
Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103985

Jafarzadeh, S.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;
IMPRS on Physical Processes in the Solar System and Beyond, Max Planck Institute for Solar System Research, Max Planck Society;

External Resource

https://ui.adsabs.harvard.edu/abs/2022NatCo..13..479S
(全文テキスト（全般）)

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

フルテキスト (公開)

公開されているフルテキストはありません

付随資料 (公開)

There is no public supplementary material available

引用

Stangalini, M., Verth, G., Fedun, V., Aldhafeeri, A. A., Jess, D. B., Jafarzadeh, S., Keys, P. H., Fleck, B., Terradas, J., Murabito, M., Ermolli, I., Soler, R., Giorgi, F., & MacBride, C. D. (2022). Large scale coherent magnetohydrodynamic oscillations in a sunspot. Nature Communications, 13, 479. doi:10.1038/s41467-022-28136-8.

引用: https://hdl.handle.net/21.11116/0000-000C-B0CA-9

要旨

Although theoretically predicted, the simultaneous excitation of several resonant modes in sunspots has not been observed. Like any harmonic oscillator, a solar magnetic flux tube can support a variety of resonances, which constitute the natural response of the system to external forcing. Apart from a few single low order eigenmodes in small scale magnetic structures, several simultaneous resonant modes were not found in extremely large sunspots. Here we report the detection of the largest-scale coherent oscillations observed in a sunspot, with a spectrum significantly different from the Sun's global acoustic oscillations, incorporating a superposition of many resonant wave modes. Magnetohydrodynamic numerical modeling agrees with the observations. Our findings not only demonstrate the possible excitation of coherent oscillations over spatial scales as large as 30-40 Mm in extreme magnetic flux regions in the solar atmosphere, but also paves the way for their diagnostic applications in other astrophysical contexts.