Forward Modelling of Standing Kink Modes in Coronal Loops I. Synthetic Views
arXiv:1603.01632 · doi:10.3847/0067-0049/223/2/23
Abstract
Kink magnetohydrodynamic (MHD) waves are frequently observed in various magnetic structures of the solar atmosphere. They may contribute significantly to coronal heating and could be used as a tool to diagnose the solar plasma. In this study, we synthesise the \ion{Fe}{9} emission of a coronal loop supporting a standing kink MHD mode. The kink MHD wave solution of a plasma cylinder is mapped into a semi-torus structure to simulate a curved coronal loop. We decompose the solution into a quasi-rigid kink motion and a quadrupole term, which dominate the plasma inside and outside the flux tube, respectively. At the loop edges, the line-of-sight integrates relatively more ambient plasma, and the background emission becomes significant. The plasma motion associated with the quadrupole term causes spectral line broadening and emission suppression. The periodic intensity suppression will modulate the integrated intensity and the effective loop width, which both exhibit oscillatory variations at half of the kink period. The quadrupole term can be directly observed as a pendular motion at front view.
arXiv comment27 pages, 14 figures
References in corpus (38)
- On Solving the Coronal Heating Problem
- MHD Waves and Coronal Seismology: an overview of recent results
- Ubiquitous torsional motions in type II spicules
- Advances in Observing Various Coronal EUV Waves in the SDO Era and Their Seismological Applications (Invited Review)
- Multiwavelength studies of MHD waves in the solar chromosphere: An overview of recent results
- Propagating waves along spicules
- Quasi-periodic Fast-mode Wave Trains Within a Global EUV Wave and Sequential Transverse Oscillations Detected by SDO/AIA
- Coronal Loop Oscillations Observed with AIA - Kink-Mode with Cross-Sectional and Density Oscillations
- Fine strand-like structure in the solar corona from MHD transverse oscillations
- Surface Alfven waves in solar flux tubes
- Solar Corona Loop Studies with AIA: I. Cross-Sectional Temperature Structure
- Resonant Absorption of Transverse Oscillations and Associated Heating in a Solar Prominence. II- Numerical aspects
- Structure of solar coronal loops: from miniature to large-scale
- Swaying threads of a solar filament
- First SDO AIA Observations of a Global Coronal EUV "Wave": Multiple Components and "Ripples"
- Wave Heating of the Solar Atmosphere
- Resonant Absorption of Transverse Oscillations and Associated Heating in a Solar Prominence. I- Observational aspects
- High Spatial Resolution Observations of Loops in the Solar Corona
- Hinode/EIS observations of propagating low-frequency slow magnetoacoustic waves in fan-like coronal loops
- First direct measurements of transverse waves in solar polar plumes using SDO/AIA
- Propagating slow magnetoacoustic waves in coronal loops observed by Hinode/EIS
- Transverse oscillations in chromospheric mottles
- Line-of-sight Effects on Observability of Kink and Sausage Modes in Coronal Structures with Imaging Telescopes
- Transverse oscillations of loops with coronal rain observed by Hinode/SOT
- Streamer Waves Driven by Coronal Mass Ejections
- X-ray and EUV Observations of Simultaneous Short and Long Period Oscillations in Hot Coronal Arcade Loops
- Hi-C & AIA observations of transverse MHD waves in active regions
- A coronal seismological study with streamer waves
- Line-of-sight geometrical and instrumental resolution effects on intensity perturbations by sausage modes
- SDO/AIA Observations of a Reflecting Longitudinal Wave in a Coronal Loop
- Unresolved fine-scale structure in solar coronal loop-tops
- Forward Modelling of Standing Kink Modes in Coronal Loops II. Applications
- Forward Modelling of Standing Slow Modes in Flaring Coronal Loops
- Modelling of Reflective Propagating Slow-mode Wave in a Flaring Loop
- Evolution of fast magnetoacoustic pulses in randomly structured coronal plasmas
- Using coronal seismology to estimate the magnetic field strength in a realistic coronal model
- Simulations of Gyrosynchrotron Microwave Emission from an Oscillating 3D Magnetic Loop
- Magneto-seismological insights into the penumbral chromosphere and evidence for wave damping in spicules
Cited by in corpus (24)
- Kink oscillations of coronal loops
- An Inside Look at Sunspot Oscillations with Higher Azimuthal Wavenumbers
- Forward Modelling of Standing Kink Modes in Coronal Loops II. Applications
- Amplitudes and energy fluxes of simulated decayless kink oscillations
- Non-damping oscillations at flaring loops
- Magnetohydrodynamic Seismology of Quiet Solar Active Regions
- Doppler shift oscillations from a hot line observed by IRIS
- Multi-instrument observations of a failed flare eruption associated with MHD waves in a loop bundle
- A Statistical Study of Short-period Decayless Oscillations of Coronal Loops in an Active Region
- Abnormal oscillation modes in a waning light bridge
- Simultaneous longitudinal and transverse oscillation in an active filament
- Traveling kink oscillations of coronal loops launched by a solar flare
- Wave pressure and energy cascade rate of kink waves computed with Elsasser variables
- Detections of Multi-Periodic Oscillations during a Circular Ribbon Flare
- Novel data analysis techniques in coronal seismology
- Persistent fast kink magnetohydrodynamic waves detected in a quiescent prominence
- Quasi-periodic pulsations in a solar flare with an unusual phase shift
- Two Quasi-periodic Fast-propagating Magnetosonic Wave Events Observed In Active Region NOAA 11167
- Temporal evolution of oscillating coronal loops
- Coronal Density and Temperature Profiles Calculated by Forward Modeling EUV Emission Observed by SDO/AIA
- Propagating Kink Waves in an Open Coronal Magnetic Flux Tube with Gravitational Stratification: Magnetohydrodynamic Simulation and Forward Modelling
- Non-equilibrium Ionization Effects on Extreme-Ultraviolet Emissions Modulated by Standing Sausage Modes in Coronal Loops
- The dynamics and observability of circularly polarized kink waves
- Forward Modeling of Simulated Transverse Oscillations in Coronal Loops and the Influence of Background Emission