A Statistical Study on The Frequency-Dependent Damping of Slow-mode Waves in Polar Plumes and Interplumes

Abstract

We perform a statistical study on the frequency-dependent damping of slow waves propagating along polar plumes and interplumes in the solar corona. Analysis of a large sample of extreme ultraviolet (EUV) imaging data with high spatial and temporal resolutions obtained from AIA/SDO suggests an inverse power-law dependence of the damping length on the periodicity of slow waves (i.e., the shorter period oscillations exhibit longer damping lengths), in agreement with the previous case studies. Similar behavior is observed in both plume and interplume regions studied in AIA 171 Å and AIA 193 Å passbands. It is found that the short-period (2--6 min) waves are relatively more abundant than their long period (7--30 min) counterparts in contrast to the general belief that the polar regions are dominated by the longer-period slow waves. We also derived the slope of the power spectra ($\alpha$, the power-law index) statistically to better understand the characteristics of turbulence present in the region. It is found that the $\alpha$ values and their distributions are similar in both plume and interplume structures across the two AIA passbands. At the same time, the spread of these distributions also indicates the complexity of the underlying turbulence mechanism.

Accepted for publication in ApJ

References in corpus (12)

• Self-consistent Coronal Heating and Solar Wind Acceleration from Anisotropic Magnetohydrodynamic Turbulence
• Frequency-dependent damping in propagating slow magneto-acoustic waves
• An ALMA Disk Mass for the Candidate Protoplanetary Companion to FW Tau
• Propagating intensity disturbances in polar corona as seen from AIA/SDO
• On the Source of Propagating Slow Magneto-acoustic Waves in Sunspots
• Coronal Fourier power spectra: implications for coronal seismology and coronal heating
• Propagating Disturbances in The Solar Corona and Spicular Connection
• Observations of Dissipation of Slow Magneto-acoustic Waves in a Polar Coronal Hole
• Sources of quasi-periodic propagating disturbances above a solar polar coronal hole
• Forward Modelling of Propagating Slow Waves in Coronal Loops and Their Frequency-Dependent Damping
• Stochastic transients as a source of quasi-periodic processes in the solar atmosphere
• Damping and power spectra of quasi-periodic intensity disturbances above a solar polar coronal hole

Cited by in corpus (4)

• MHD Waves in open coronal structures
• A new look at the frequency-dependent damping of slow-mode waves in the solar corona
• Modelling the connection between propagating disturbances and solar spicules
• First detection of acoustic-like flux in the middle solar corona