Characteristics and Energy Flux Distributions of Decayless Transverse Oscillations Depending on Coronal Regions

Abstract

Lim et al. (2023) have recently proposed that the slope ($\delta$) of the power law distribution between the energy flux and oscillation frequency could determine whether high-frequency transverse oscillations give a dominant contribution to the heating ($\delta <1$). A meta-analysis of decayless transverse oscillations revealed that high-frequency oscillations potentially play a key role in heating the solar corona. We aim to investigate how (whether) the distributions of the energy flux contained in transverse oscillations, and their slopes, depend on the coronal region in which the oscillation occurs. We analyse transverse oscillations from 41 quiet Sun (QS) loops and 22 active region (AR) loops observed by Solar Orbiter/Extreme Ultraviolet Imager (SolO/EUI) HRIEUV. The energy flux and energy are estimated using analysed oscillation parameters and loop properties, such as periods, displacement amplitudes, loop lengths, and minor radii of the loops. It is found that about 71% of QS loops and 86% of AR loops show decayless oscillations. We find that the amplitude does not change depending on different regions, but the difference in the period is more pronounced. Although the power law slope ($\delta =-1.79$) in AR is steeper than that ($\delta =-1.59$) in QS, both of them are significantly less than the critical slope of 1. Our statistical study demonstrates that high-frequency transverse oscillations can heat the QS. For ARs, the total energy flux is insufficient unless yet-unobserved oscillations with frequencies up to 0.17 Hz are present. Future EUI campaigns will be planned to confirm this.

14 pages, 8 figures, 3 tables, accepted for publication in A&A

References in corpus (24)

• Multi-scale Gaussian normalization for solar image processing
• Persistent Doppler shift oscillations observed with HINODE/EIS in the solar corona: spectroscopic signatures of Alfvenic waves and recurring upflows
• Nonlinear Instability of kink oscillations due to shear motions
• Kink oscillations of coronal loops
• First direct measurements of transverse waves in solar polar plumes using SDO/AIA
• A global view of velocity fluctuations in the corona below 1.3 $R_{\odot }$ with CoMP
• Heating by transverse waves in simulated coronal loops
• Picoflare jets power the solar wind emerging from a coronal hole on the Sun
• Modelling observed decay-less oscillations as resonantly enhanced Kelvin-Helmholtz vortices from transverse MHD waves and their seismological application
• Fine-scale explosive energy release at sites of prospective magnetic flux cancellation in the core of the solar active region observed by Hi-C 2.1, IRIS and SDO
• Solar coronal heating from small-scale magnetic braids
• Excitation of decay-less transverse oscillations of coronal loops by random motions
• Decayless oscillations in solar coronal bright points
• Extreme-ultraviolet bursts and nanoflares in the quiet-Sun transition region and corona
• Magnetohydrodynamic Seismology of Quiet Solar Active Regions
• Generating transverse loop oscillations through a steady-flow driver
• What drives decayless kink oscillations in active region coronal loops on the Sun?
• Nanoflare distributions over solar cycle 24 based on SDO/AIA differential emission measure observations
• Flare induced decay-less transverse oscillations in solar coronal loops
• Two-Spacecraft Detection of Short-period Decayless Kink Oscillations of Solar Coronal Loops
• Estimating the energy dissipation {from Kelvin-Helmholtz instability induced} turbulence in oscillating coronal loops}
• The Role of High-frequency Transverse Oscillations in Coronal Heating
• 30-min Decayless Kink Oscillations in a Very Long Bundle of Solar Coronal Plasma Loops
• Decayless oscillations in 3D coronal loops excited by a power-law driver

Cited by in corpus (1)

• Spectra of standing kink waves in loops and the effects of the lower solar atmosphere