A Statistical Investigation of Decayless Oscillations in Small-scale Coronal Loops Observed by Solar Orbiter/EUI

Abstract

Decayless kink oscillations are omnipresent in the solar atmosphere and a viable candidate for coronal heating. Though there have been extensive studies of decayless oscillations in coronal loops with a few hundred Mm lengths, the properties of these oscillations in small-scale ($\sim$10 Mm) loops are yet to be explored. In this study, we present the properties of decayless oscillations in small loops embedded in the quiet corona and coronal holes. We use high resolution observations from the Extreme Ultraviolet Imager onboard Solar Orbiter with pixel scales of 210 km and 5 s cadence or better. We find 42 oscillations in 33 coronal loops with loop lengths varying between 3 to 23 Mm. The average displacement amplitude is found to be 136 km. The oscillations period has a range of 27 to 276 s, and the velocity amplitudes range from 2.2 to 19.3 km s${}^{-1}$. The observed kink speeds are lower than those observed in active region coronal loops. The variation of loop length with the period does not indicate a strong correlation. Coronal seismology technique indicated an average magnetic field value of 2.1 G. We estimate the energy flux with a broad range of 0.6-314 W m${}^{-2}$. Moreover, we note that the short-period decayless oscillations are not prevalent in the quiet Sun and coronal holes. Therefore, our study suggests that decayless oscillations in small-scale coronal loops are unlikely to provide enough energy to heat the quiet Sun and accelerate solar wind in the coronal holes.

Accepted for publication in the Astronomy & Astrophysics

References in corpus (26)

• The Solar Orbiter mission -- Science overview
• Prevalence of Small-scale Jets from the Networks of the Solar Transition Region and Chromosphere
• Coronal heating by MHD waves
• Persistent Doppler shift oscillations observed with HINODE/EIS in the solar corona: spectroscopic signatures of Alfvenic waves and recurring upflows
• Kink oscillations of coronal loops
• First direct measurements of transverse waves in solar polar plumes using SDO/AIA
• A basal contribution from p-modes to the Alfvénic wave flux in the Sun's corona
• MHD Waves in open coronal structures
• Heating by transverse waves in simulated coronal loops
• Mapping the magnetic field in the solar corona through magnetoseismology
• Excitation of decay-less transverse oscillations of coronal loops by random motions
• Decayless oscillations in solar coronal bright points
• Amplitudes and energy fluxes of simulated decayless kink oscillations
• The First 3D Coronal Loop Model Heated by MHD Waves against Radiative Losses
• 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?
• A Statistical Study of Short-period Decayless Oscillations of Coronal Loops in an Active Region
• High frequency decayless waves with significant energy in Solar Orbiter/EUI observations
• Flare induced decay-less transverse oscillations in solar coronal loops
• Two-Spacecraft Detection of Short-period Decayless Kink Oscillations of Solar Coronal Loops
• Transverse loop oscillations via vortex shedding: a self oscillating process
• Propagating brightenings in small loop-like structures in the quiet Sun corona: Observations from Solar Orbiter/EUI
• High-resolution observations of active region moss and its dynamics
• Transverse oscillations in a coronal loop triggered by a jet
• Role of small-scale impulsive events in heating the X-ray bright points of the quiet Sun

Cited by in corpus (12)

• Observations of Fan-Spine Topology by Solar Orbiter/EUI: Rotational Motions and Indications of Alfvén Waves
• Thin coronal jets and plasmoid-mediated reconnection: Insights from Solar Orbiter observations and Bifrost simulations
• Characteristics and Energy Flux Distributions of Decayless Transverse Oscillations Depending on Coronal Regions
• Uniturbulence and Alfven wave solar model
• Undersampling effects on observed periods of coronal oscillations
• Kelvin-Helmholtz instability and heating in oscillating loops perturbed by power-law transverse wave drivers
• Coronal kink oscillations and photospheric driving: combining SolO/EUI and SST/CRISP high-resolution observations
• On the Effect of Coronal Rain on Decayless Kink Oscillations of Coronal Loops
• Accessing the fine temporal scale of EUV brightenings and their quasi-periodic pulsations: 1 second cadence observations by Solar Orbiter/EUI
• High-Frequency Magnetohydrodynamic Waves with Substantial Energy in the Solar Polar Corona
• Spectra of standing kink waves in loops and the effects of the lower solar atmosphere
• Polarization of decayless kink oscillations in a 3D MHD coronal loop model