Variation of acoustic cutoff period with height in the solar atmosphere: theory versus observations

Abstract

Recently Wiśniewska et al. demonstrated observationally how the acoustic cutoff frequency varies with height in the solar atmosphere including the upper photosphere and the lower and middle chromosphere, and showed that the observational results cannot be accounted for by the existing theoretical formulas for the acoustic cutoff. In order to reproduce the observed variation of the cutoff with atmospheric height, numerical simulations of impulsively generated acoustic waves in the solar atmosphere are performed, and the spectral analysis of temporal wave profiles is used to compute numerically changes of the acoustic cutoff with height. Comparison of the numerical results with the observational data shows good agreement, which clearly indicates that the obtained results may be used to determine the structure of the background solar atmosphere.

Cited by in corpus (7)

• The Frequency-dependent Damping of Slow Magnetoacoustic Waves in a Sunspot Umbral Atmosphere
• Numerical determination of the cutoff frequency in solar models
• Observed local dispersion relations for magneto-acoustic-gravity waves in the Sun's atmosphere: Mapping the acoustic cut-off frequency
• Two-fluid numerical model of chromospheric heating and plasma outflows in a quiet-Sun
• Ambipolar Diffusion in the Lower Solar Atmosphere: MHD Simulations of a Sunspot
• Frequency Distribution of Acoustic Oscillation in the Solar Atmosphere During Flare Event
• Numerical Simulations of Two-Fluid Magnetoacoustic Waves in the Solar Atmosphere