Persistent Doppler shift oscillations observed with HINODE/EIS in the solar corona: spectroscopic signatures of Alfvenic waves and recurring upflows
arXiv:1209.5286 · doi:10.1088/0004-637X/759/2/144
Abstract
Using data obtained by the EUV Imaging Spectrometer (EIS) onboard Hinode, we have per- formed a survey of obvious and persistent (without significant damping) Doppler shift oscillations in the corona. We have found mainly two types of oscillations from February to April in 2007. One type is found at loop footpoint regions, with a dominant period around 10 minutes. They are characterized by coherent behavior of all line parameters (line intensity, Doppler shift, line width and profile asymmetry), apparent blue shift and blueward asymmetry throughout almost the en- tire duration. Such oscillations are likely to be signatures of quasi-periodic upflows (small-scale jets, or coronal counterpart of type-II spicules), which may play an important role in the supply of mass and energy to the hot corona. The other type of oscillation is usually associated with the upper part of loops. They are most clearly seen in the Doppler shift of coronal lines with forma- tion temperatures between one and two million degrees. The global wavelets of these oscillations usually peak sharply around a period in the range of 3-6 minutes. No obvious profile asymmetry is found and the variation of the line width is typically very small. The intensity variation is often less than 2%. These oscillations are more likely to be signatures of kink/Alfven waves rather than flows. In a few cases there seems to be a pi/2 phase shift between the intensity and Doppler shift oscillations, which may suggest the presence of slow mode standing waves according to wave theories. However, we demonstrate that such a phase shift could also be produced by loops moving into and out of a spatial pixel as a result of Alfvenic oscillations. In this scenario, the intensity oscillations associated with Alfvenic waves are caused by loop displacement rather than density change.
9 figures, accepted by ApJ
References in corpus (85)
- Alfven Waves in the Lower Solar Atmosphere
- MHD Waves and Coronal Seismology: an overview of recent results
- Time-Distance Seismology of the Solar Corona with CoMP
- Observing the Roots of Solar Coronal Heating - in the Chromosphere
- EUV emission lines and diagnostics observed with Hinode/EIS
- On the nature of kink MHD waves in magnetic flux tubes
- On-disk counterparts of type II spicules in the Ca II 854.2 nm and Halpha lines
- High precision density measurements in the solar corona: I. Analysis methods and results for Fe XII and Fe XIII
- Oscillations and waves in solar spicules
- 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
- Standing Slow-Mode Waves in Hot Coronal Loops: Observations, Modeling, and Coronal Seismology
- Growing transverse oscillations of a multistranded loop observed by SDO/AIA
- Establishing a Connection Between Active Region Outflows and the Solar Wind: Abundance Measurements with EIS/Hinode
- Surface Alfven waves in solar flux tubes
- Flows and Non-thermal Velocities in Solar Active Regions Observed with the Extreme-ultraviolet Imaging Spectrometer on Hinode: A Tracer of Active Region Sources of Heliospheric Magnetic Fields?
- Direct Imaging by SDO AIA of Quasi-periodic Fast Propagating Waves of ~2000 km/s in the Low Solar Corona
- Nonlinear Fast Magnetoacoustic Wave Propagation in the Neighbourhood of a 2D magnetic X-point: Oscillatory Reconnection
- Nonlinear propagation of Alfven waves driven by observed photospheric motions: Application to the coronal heating and spicule formation
- Quasi-periodic Propagating Signals in the Solar Corona: The Signature of Magnetoacoustic Waves or High-Velocity Upflows?
- What can we learn about solar coronal mass ejections, coronal dimmings, and Extreme-Ultraviolet jets through spectroscopic observations?
- On active region loops: Hinode/EIS observations
- On red shifs in the transition region and corona
- Two components of the coronal emission revealed by EUV spectroscopic observations
- MHD Sausage Mode Oscillations in Coronal Loops
- The first observed stellar X-ray flare oscillation: Constraints on the flare loop length and the magnetic field
- Hinode/EIS observations of propagating low-frequency slow magnetoacoustic waves in fan-like coronal loops
- Asymmetries of solar coronal extreme ultraviolet emission lines
- The Spectroscopic Signature of Quasi-periodic Upflows in Active Region Timeseries
- Observation of High-speed Outflow on Plume-like Structures of the Quiet Sun and Coronal Holes with SDO/AIA
- Determination of the Coronal Magnetic Field by Hot Loop Oscillations
- Ubiquitous High Speed Transition Region and Coronal Upflows in the Quiet Sun
- Observation of kink waves in solar spicules
- Propagating slow magnetoacoustic waves in coronal loops observed by Hinode/EIS
- Observations of sausage modes in magnetic pores
- Observational Study Of the Quasi-Periodic Fast Propagating Magnetosonic Waves and the Associated Flare on 2011 May 30
- SOHO/SUMER Observations of Prominence Oscillation Before Eruption
- Doppler shift oscillations in solar spicules
- Observing Episodic Coronal Heating Events Rooted in Chromospheric Activity
- Multiple Component Outflows in an Active Region Observed with the EUV Imaging Spectrometer on Hinode
- Transverse oscillations in chromospheric mottles
- Line-of-sight Effects on Observability of Kink and Sausage Modes in Coronal Structures with Imaging Telescopes
- 3D Coronal Slow Modes: Towards 3D Seismology
- Slow magnetosonic waves and fast flows in active region loops
- Streamer Waves Driven by Coronal Mass Ejections
- Propagating MHD waves in coronal holes
- STEREO Observations of Quasi-Periodically Driven High Velocity Outflows in Polar Plumes
- First Stereoscopic Coronal Loop Reconstructions from Stereo Secchi Images
- The Temperature Dependence of Solar Active Region Outflows
- Observational Signatures of Simulated Reconnection Events in the Solar Chromosphere and Transition Region
- Generation of quasi-periodic waves and flows in the solar atmosphere by oscillatory reconnection
- Velocity measurements for a solar active region fan loop from Hinode/EIS observations
- On The Doppler Velocity of Emission Line Profiles Formed in the "Coronal Contraflow" that is the Chromosphere-Corona Mass Cycle
- Omnipresent long-period intensity oscillations in open coronal structures
- Numerical simulations of spicule formation in the solar atmosphere
- A coronal seismological study with streamer waves
- Propagating intensity disturbances in polar corona as seen from AIA/SDO
- Propagating Disturbances in Coronal Loops: A Detailed Analysis of Propagation Speeds
- Numerical simulations of solar macrospicules
- Propagating waves in polar coronal holes as seen by SUMER and EIS
- Accelerating waves in polar coronal holes as seen by EIS and SUMER
- Continuous upflows and sporadic downflows observed in active regions
- Density structure of an active region and associated moss using Hinode/EIS
- Outflows at the Edges of an Active Region in a Coronal Hole: A Signature of Active Region Expansion?
- Kink waves in an active region dynamic fibril
- Temporal Variability of Active Region Outflows
- Doppler Shift, Intensity, and Density Oscillations Observed with the EUV Imaging Spectrometer on Hinode
- On the propagation of p-modes into the solar chromosphere
- Observations of Solar Doppler Shift Oscillations with the EUV Imaging Spectrometer on Hinode
- Observations of quasi-periodic phenomena associated with a large blowout solar jet
- Intensity oscillations observed with Hinode near the south pole of the Sun: leakage of low frequency magneto-acoustic waves into the solar corona
- Streamer Wave Events Observed in Solar Cycle 23
- Observations of X-ray oscillations in XI Boo: Evidence of a fast kink mode in the stellar loops
- Resonantly Damped Propagating Kink Waves in Longitudinally Stratified Solar Waveguides
- Mode identification of MHD waves in an active region observed with Hinode/EIS
- Flows at the Edge of an Active Region: Observation and Interpretation
- Observations of Plasma Upflow in a Warm Loop with Hinode/EIS
- Observations of a pulse driven cool polar jet by SDO/AIA
- Slow Magneto-acoustic Waves Observed above Quiet-Sun Region in a Dark Cavity
- The Impact of New EUV Diagnostics on CME-Related Kinematics
- On the statistical detection of propagating waves in polar coronal holes
- On the nature of spectral line broadening in solar coronal dimmings
- Network oscillations at the boundary of an equatorial coronal hole
- Fourier analysis of active-region plage
Cited by in corpus (101)
- Coronal heating by MHD waves
- Global maps of the magnetic field in the solar corona
- Fine strand-like structure in the solar corona from MHD transverse oscillations
- Resonant Absorption of Transverse Oscillations and Associated Heating in a Solar Prominence. II- Numerical aspects
- Kink oscillations of coronal loops
- Wave Heating of the Solar Atmosphere
- Observation and Modeling of Solar Jets
- Global sausage oscillation of solar flare loops detected by the Interface Region Imaging Spectrograph
- MHD Waves in open coronal structures
- Frequency-dependent damping in propagating slow magneto-acoustic waves
- Mapping the magnetic field in the solar corona through magnetoseismology
- Hi-C & AIA observations of transverse MHD waves in active regions
- SDO/AIA Observations of a Reflecting Longitudinal Wave in a Coronal Loop
- First comparison of wave observations from CoMP and AIA/SDO
- Upflows in the upper solar atmosphere
- Observations and numerical models of solar coronal heating associated with spicules
- The Heating of Solar Coronal Loops by Alfven Wave Turbulence
- Observations of Coronal Mass Ejections with the Coronal Multichannel Polarimeter
- Excitation of decay-less transverse oscillations of coronal loops by random motions
- Decayless oscillations in solar coronal bright points
- Waves in Solar Coronal Loops
- The First 3D Coronal Loop Model Heated by MHD Waves against Radiative Losses
- Propagating Disturbances in The Solar Corona and Spicular Connection
- Non-damping oscillations at flaring loops
- Magnetohydrodynamic Seismology of Quiet Solar Active Regions
- Propagation and dispersion of transverse wave trains in magnetic flux tubes
- Generating transverse loop oscillations through a steady-flow driver
- Investigating the Transition Region Explosive Events and Their Relationship to Network Jets
- Doppler shift oscillations from a hot line observed by IRIS
- What drives decayless kink oscillations in active region coronal loops on the Sun?
- Preflare very long-periodic pulsations observed in Halpha emission before the onset of a solar flare
- Measuring temperature - dependent propagating disturbances in coronal fan loops using multiple SDO/AIA channels and surfing transform technique
- Non-linear damping of standing kink waves computed with Elsasser variables
- A Statistical Study of Short-period Decayless Oscillations of Coronal Loops in an Active Region
- A Detailed Comparison Between The Observed and Synthesized Properties of a Simulated Type ii Spicule
- Flare induced decay-less transverse oscillations in solar coronal loops
- High frequency decayless waves with significant energy in Solar Orbiter/EUI observations
- Two-Spacecraft Detection of Short-period Decayless Kink Oscillations of Solar Coronal Loops
- Transverse coronal loop oscillations excited by homologous circular-ribbon flares
- Quasi-periodic pulsation detected in Lyman-alpha emission during solar flares
- Using coronal seismology to estimate the magnetic field strength in a realistic coronal model
- Transverse loop oscillations via vortex shedding: a self oscillating process
- Observations of a quasi-periodic pulsation in the coronal loop and microwave flux during a solar preflare phase
- Estimating the energy dissipation {from Kelvin-Helmholtz instability induced} turbulence in oscillating coronal loops}
- Kink Oscillations in Solar Coronal Loops with Elliptical Cross-Sections. I. the linear regime
- Traveling kink oscillations of coronal loops launched by a solar flare
- The Structure and Origin of Switchbacks: Parker Solar Probe Observations
- The Role of High-frequency Transverse Oscillations in Coronal Heating
- Persistent fast kink magnetohydrodynamic waves detected in a quiescent prominence
- On the relation between transition region network jets and coronal plumes
- A Statistical Investigation of Decayless Oscillations in Small-scale Coronal Loops Observed by Solar Orbiter/EUI
- On Modeling the Kelvin--Helmholtz Instability in Solar Atmosphere
- Detection of high frequency oscillations and damping from multi-slit spectroscopic observations of the corona
- High-resolution observations of active region moss and its dynamics
- Cut-off of transverse waves through the solar transition region
- MHD Waves in the coronal holes
- Apparent and Intrinsic Evolution of Active Region Upflows
- 30-min Decayless Kink Oscillations in a Very Long Bundle of Solar Coronal Plasma Loops
- Revisiting the relation between nonthermal line widths and transverse MHD wave amplitudes
- Application of a magnetic-field-induced transition in Fe X to solar and stellar coronal magnetic field measurements
- Current-sheet Oscillations Caused by Kelvin-Helmholtz Instability at the Loop Top of Solar Flares
- Non-thermal line broadening due to braiding-induced turbulence in solar coronal loops
- A statistical study of propagating MHD kink waves in the quiescent corona
- Alfvénic motions arising from asymmetric acoustic wave drivers in solar magnetic structures
- Observations of upward propagating waves in the transition region and corona above Sunspots
- Exploring the origin of multi-periodic pulsations during a white-light flare
- Decayless oscillations in 3D coronal loops excited by a power-law driver
- Modelling the connection between propagating disturbances and solar spicules
- Measurements of the magnetic field strengths at the bases of stellar coronae using the magnetic-field-induced transition theory
- Propagating Kink Waves in an Open Coronal Magnetic Flux Tube with Gravitational Stratification: Magnetohydrodynamic Simulation and Forward Modelling
- Do Periods of Decayless Kink Oscillations of Solar Coronal Loops Depend on Noise?
- Reconnection generated plasma flows in the quasi-separatrix layer in localised solar corona
- Forward Modeling of Simulated Transverse Oscillations in Coronal Loops and the Influence of Background Emission
- Impulsively Generated Kink Wave Trains in Solar Coronal Slabs
- Very long-periodic pulsations detected simultaneously in a white-light flare and sunspot penumbra
- Solar coronal magnetic field measurements using spectral lines available in Hinode/EIS observations: Strong and weak field techniques and temperature diagnostics
- Uniturbulence and Alfven wave solar model
- Characteristics and Energy Flux Distributions of Decayless Transverse Oscillations Depending on Coronal Regions
- Heating of quiescent coronal loops caused by nearby eruptions observed with the Solar Dynamics Observatory and the Solar Upper Transition Region Imager
- Coronal kink oscillations and photospheric driving: combining SolO/EUI and SST/CRISP high-resolution observations
- Propagating wave in active region-loops, located over the solar disk observed by the Interface Region Imaging Spectrograph
- Undersampling effects on observed periods of coronal oscillations
- Kelvin-Helmholtz instability and heating in oscillating loops perturbed by power-law transverse wave drivers
- Evidence for Energy Supply by Active Region Spicules to the Solar Atmosphere
- Propagating Disturbances along fan-like coronal loops in an active region
- Dynamics in the transition region beneath active region upflows viewed by IRIS
- Propagating Oscillations in the Lower Atmosphere under Coronal Holes
- Impulsively Generated Linear and Non-linear Alfven Waves in the Coronal Funnels
- Investigating coronal wave energy estimates using synthetic non-thermal line widths
- Global Coronal Magnetic Field Estimation Using Bayesian Inference
- Microwave response to kink oscillations of a plasma slab
- Population of Bright Plume Threads in Solar Polar Coronal Holes
- Global Coronal Plasma Diagnostics Based on Multi-slit EUV Spectroscopy
- Mapping ground-based coronagraphic images to Helioprojective-Cartesian coordinate system by image registration
- Active region upflows in various coronal structures and their coupling to the lower atmosphere
- Accessing the fine temporal scale of EUV brightenings and their quasi-periodic pulsations: 1 second cadence observations by Solar Orbiter/EUI
- Line Profile Studies of Coronal Active Regions in Fe XII λ195.12 Using Hinode/EIS
- 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
- A self-consistent 3D MHD model producing a solar blowout jet
- Forward Modeling of Solar Coronal Magnetic Field Measurements Based on a Magnetic-field-induced Transition in Fe X