Observations of Locally Excited Waves in the Low Solar Atmosphere Using the Daniel K. Inouye Solar Telescope

We present an interpretation of the recent Daniel K. Inouye Solar Telescope (DKIST) observations of propagating wave fronts in the lower solar atmosphere. Using MPS/University of Chicago MHD radiative magnetohydrodynamic simulations spanning the solar photosphere, the overshoot region, and the lower...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2024-08, Vol.971 (1), p.L1
Main Authors: Bahauddin, Shah Mohammad, Fischer, Catherine E., Rast, Mark P., Milic, Ivan, Woeger, Friedrich, Rempel, Matthias, Keys, Peter H., Rimmele, Thomas R.
Format: Article
Language:English
Subjects:
Acoustic propagation
Acoustics
Atmosphere
Broadband
Chromosphere
Fronts
Inouye, Daniel K
Inversions
Lower atmosphere
Magnetohydrodynamic simulation
Momentum budget
Photosphere
Quiet sun
Shock wave propagation
Solar atmosphere
Solar oscillations
Sound sources
Sound waves
Temporal resolution
The Sun
Wave fronts
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Summary:We present an interpretation of the recent Daniel K. Inouye Solar Telescope (DKIST) observations of propagating wave fronts in the lower solar atmosphere. Using MPS/University of Chicago MHD radiative magnetohydrodynamic simulations spanning the solar photosphere, the overshoot region, and the lower chromosphere, we identify three acoustic-wave source mechanisms, each occur at a different atmospheric height. We synthesize the DKIST Visible Broadband Imager G -band, blue-continuum, and Ca ii K signatures of these waves at high spatial and temporal resolution, and conclude that the wave fronts observed by DKIST likely originate from acoustic sources at the top of the solar photosphere overshoot region and in the chromosphere proper. The overall importance of these local sources to the atmospheric energy and momentum budget of the solar atmosphere is unknown, but one of the excitation mechanisms identified (upward propagating shock interaction with down-welling chromospheric plasma resulting in acoustic radiation) may be an important shock dissipation mechanism. Additionally, the observed wave fronts may prove useful for ultralocal helioseismological inversions and promise to play an important diagnostic role at multiple atmospheric heights.
ISSN:2041-8205
2041-8213
DOI:10.3847/2041-8213/ad62f8