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Table 1.

Parameters for phase and amplification spectra fits and observed cutoff frequency.

Line pair T (K) Δz (km) τR (s) ωc (mHz)
Ca I-Si I 4000 130 30 5.0
Si I-Fe I 3000 200 20 6.0
Fe I-He I 3500 750 40 3.6
Ca II H-He I 7000 150 20 3.1
Ca I-He I 4000 1100 40 3.3
Si I-He I 4000 1000 40 3.3

Notes.The first column indicates the pair of lines used in the analysis; the second to fourth columns are the temperature (T), difference in formation heights (Δz), and characteristic timescale of the radiative losses (τR) retrieved from the fit of the phase and amplification spectra to a model of linear wave propagation in a gravitationally stratifed atmosphere with radiative losses; and the last column is the observationally measured cutoff frequency (ωc).

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