Nature of Quiet Sun Oscillations Using Data from the Hinode, TRACE, and SOHO Spacecraft

TL;DR

This study analyzes multi-wavelength solar observations to identify propagating magnetoacoustic waves in quiet Sun regions, revealing long-period oscillations that may contribute to solar atmospheric heating.

Contribution

It is the first to report long-period waves in quiet-Sun network regions using Fourier and wavelet analysis across multiple spacecraft data.

Findings

Long-period oscillations (15-30 min) detected in bright magnetic regions.

Short-period powers concentrated in dark regions.

Propagating waves likely contribute to solar atmosphere heating.

Abstract

We study the nature of quiet-Sun oscillations using multi-wavelength observations from TRACE, Hinode, and SOHO. The aim is to investigate the existence of propagating waves in the solar chromosphere and the transition region via analyzing the statistical distribution of power in different locations, e.g. in bright magnetic (network), bright non-magnetic and dark non-magnetic (inter-network) regions, separately. We use Fourier power and phase-difference techniques combined with a wavelet analysis. Two-dimensional Fourier power maps were constructed in the period bands 2-4 minutes, 4-6 minutes, 6-15 minutes, and beyond 15 minutes. We detect the presence of long-period oscillations with periods between 15 and 30 minutes in bright magnetic regions. These oscillations were detected from the chromosphere to the transition region. The Fourier power maps show that short-period powers are mainly concentrated in dark regions whereas long-period powers are concentrated in bright magnetic regions. This is the first report of long-period waves in quiet-Sun network regions. We suggest that the observed propagating oscillations are due to magnetoacoustic waves which can be important for the heating of the solar atmosphere.