Observed local dispersion relations for magneto-acoustic-gravity waves in the Sun's atmosphere: Mapping the acoustic cut-off frequency

Abstract

We present the observed local dispersion relations for magneto-acoustic-gravity waves in the Sun's atmosphere for different levels of magnetic field strength. We model these data with a theoretical local dispersion relation to produce spatial maps of the acoustic cut-off frequency in the Sun's photosphere. These maps have implications for the mechanical heating of the Sun's upper atmosphere, by magneto-acoustic-gravity waves, at different phases of the solar magnetic activity cycle.

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• Continuous Solar Observations from the Ground -- Assessing Duty Cycle from GONG Observations
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• Multi-Height Observations of Atmospheric Gravity Waves at Solar Disk Center
• Chromospheric Heating by Acoustic Waves Compared to Radiative Cooling: II -- Revised Grid of Models