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

TL;DR

This paper maps the local dispersion relations of magneto-acoustic-gravity waves in the Sun's atmosphere, revealing how magnetic fields influence wave propagation and the acoustic cut-off frequency, with implications for solar atmospheric heating.

Contribution

It introduces spatial maps of the acoustic cut-off frequency derived from observed dispersion relations, linking wave behavior to magnetic activity in the Sun's atmosphere.

Findings

Spatial variation of the acoustic cut-off frequency mapped across the Sun's photosphere.

Magnetic field strength significantly affects wave dispersion relations.

Implications for understanding solar atmospheric heating mechanisms.

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.