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Signatures of sunspot oscillations and the case for chromospheric resonances

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Fig. 1: Umbral chromospheric spectral energies of five observed time series.
Fig. 2: Temperature stratification and spectral energies of numerical simulations of wave propagation through an atmosphere without an upper temperature gradient.

Data availability

The data that support this paper are available from the corresponding author upon reasonable request.


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Financial support from the State Research Agency (AEI) of the Spanish Ministry of Science, Innovation and Universities (MCIU) and the European Regional Development Fund (FEDER) under grant number PGC2018-097611-A-I00 is acknowledged. The 1.5-mGREGOR solar telescope was built by a German consortium under the leadership of the Leibniz Institute for Solar Physics (KIS) in Freiburg with the Leibniz Institute for Astrophysics Potsdam, the Institute for Astrophysics Göttingen, and the Max Planck Institute for Solar System Research in Göttingen as partners, and with contributions by the Instituto de Astrofísica de Canarias and the Astronomical Institute of the Academy of Sciences of the Czech Republic. I acknowledge the contribution of Teide High-Performance Computing facilities to the results of this research. TeideHPC facilities are provided by the Instituto Tecnológico y de Energías Renovables (ITER S.A.).

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Correspondence to Tobías Felipe.

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Felipe, T. Signatures of sunspot oscillations and the case for chromospheric resonances. Nat Astron 5, 2–4 (2021).

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