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3-min @ umbral chromosphere (Becker & Schultz 1972) 5-min @ umbral photosphere ( Bhatnagar et al. 1972). p -Mode Seismiv Waves. Wave trap. P cutoff 180 s ???. Barnerjee et al. 2001, A&A De Pontieu et al. 2004. P-mode wave can leak into the chromosphere and TR, if there is B t.
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3-min @umbralchromosphere(Becker & Schultz 1972) 5-min @umbral photosphere (Bhatnagar et al. 1972)
p-Mode Seismiv Waves Wave trap Pcutoff 180 s ??? Barnerjee et al. 2001, A&A De Pontieu et al. 2004 P-mode wave can leak into the chromosphere and TR, if there is Bt
3-min Period Oscillations Chromospheric cavity Leibacher et al. (1982) Cut-off period Fleck & Schmitz (1991) Pcutoff 180 s