Propagation of High Frequency Waves in the Quiet Solar Atmosphere

TL;DR

This study investigates high-frequency wave propagation in the quiet solar atmosphere using spectroscopic data, revealing wave propagation in certain frequency ranges and in magnetic regions, contributing to understanding solar atmospheric heating.

Contribution

It provides observational evidence of high-frequency wave propagation in the quiet Sun, including in magnetic regions, using wavelet analysis of spectroscopic data.

Findings

Wave propagation observed in 10-13 mHz frequency range.

Propagation of low-frequency waves in magnetic regions.

Supports the role of high-frequency waves in solar atmospheric heating.

Abstract

High-frequency waves (5 mHz to 20mHz) have previously been suggested as a source of energy accounting partial heating of the quiet solar atmosphere. The dynamics of previously detected high-frequency waves is analysed here. Image sequences are taken using the German Vacuum Tower Telescope (VTT), Observatorio del Teide, Izana, Tenerife, with a Fabry-Perot spectrometer. The data were speckle reduced and analyzed with wavelets. Wavelet phase-difference analysis is performed to determine whether the waves propagate. We observe the propagation of waves in the frequency range 10mHz to 13mHz. We also observe propagation of low-frequency waves in the ranges where they are thought to be evanescent in regions where magnetic structures are present.