Theoretical basis for coronal loop oscillations
The damping of coronal loop oscillations
... a loop oscillation is determined by the complex fre- quency of the eigenmode of the viscous MHD ...the loop to be described by its ...global loop motions for times much larger than the eigenmode ...
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Determination of the coronal magnetic field by coronal loop oscillations
... generated coronal loop oscillations in TRACE ...of coronal loop oscillations were detected by TRACE in March and April ...oscillating coronal loops is ...
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Effect of structuring on coronal loop oscillations
... acoustic oscillations of a coronal ...the loop, by introducing a step function for the sound ...acoustic oscillations, with no wave energy penetrating the dense footpoint ...
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Coronal loop oscillations and diagnostics with Hinode/EIS
... A similar procedure is applied to the propagating wave so- lution in Fig. 2 and the resulting synthetic EIS observations are presented in Fig. 5 for the imaging mode and in Fig. 6 for the spectroscopy mode. The slit/slot ...
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Decaying and decayless transverse oscillations of a coronal loop
... decayless oscillations there is no flare energy ...the coronal plasma (Nakariakov et ...low-amplitude oscillations before and after the flare should have an intrin- sic period of 3–5 min (see period ...
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Excitation of vertical coronal loop oscillations by plasma condensations
... amplitude oscillations transi- tioning into persistent, smaller amplitude, shorter period oscil- lations once the condensations have fallen into the lower loop legs, where their mass has negligible e ff ect ...
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Excitation of vertical coronal loop oscillations by impulsively driven flows
... the loop and excita- tion of the oscillations, as verified by a test run for the Π = 50 case with the thermal conduction ...for coronal values used here and L = 10 Mm, which is long compared to the ...
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Coronal loop slow mode oscillations driven by the kink instability
... The proposed mechanism for the conversion of the 1st har- monic into the fundamental is tied in with the post reconnection field lines. The region with the strongest reconnection is half way along the loop where ...
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The effects of line of sight integration on multistrand coronal loop oscillations
... individual loop strands. As the direction of the transverse driving for each loop was chosen randomly, this leads to significant cancellation of the velocity perturbations along the ...the loop ...
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Effect of longitudinal magnetic and density inhomogeneity on transversal coronal loop oscillations
... much theoretical disagreement about the fine structure of coronal loops, it is important that any proposed mod- els can be tested against the observed oscillatory ...small loop expansion factors ...
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An Interpretation of Flare-Induced and Decayless Coronal-Loop Oscillations as Interference Patterns
... of coronal-loop oscillations, which considers that the waves are trapped in a two- dimensional waveguide formed by the entire arcade of field ...resonant oscillations of just the visible ...
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Damping of vertical coronal loop kink oscillations through wave tunneling
... In conclusion, these results show that even in the absence of anomalously large viscosity or magnetic diffusivity it is pos- sible to obtain decay rates for vertically polarized kink waves in coronal flux tubes ...
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Excitation and evolution of vertically polarised transverse loop oscillations by coronal rain
... transverse loop displacement as a function of time, for the first IRIS time ...estimated loop position ...the loop position. Third: the measured loop dis- placement based on Gaussian fitting ...
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Coronal loop seismology using standing kink oscillations with a lookup table
... Another method for estimating ǫ is by forward modeling the appearance of the density profile for direct comparison with the thin boundary (TB) approximation. To correct for this effect, Pascoe et al. (2018) performed a ...
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Coronal magnetic field measurement using loop oscillations observed by Hinode/EIS
... performing coronal seismology with imaging spectrometers indicates the opportunities EIS of- fers for the full scale implementation of the MHD coronal seis- mological ...and oscillations would also ...
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Coronal loop seismology using damping of standing kink oscillations by mode coupling
... Figure 7 shows the dispersion diagrams for the three loops, i.e. the phase speed as a function of the wavenumber k “ 2 π{λ normalised by the loop minor radius R. The upper, middle, and lower dotted lines represent ...
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Kinematics of coronal rain in a transversely oscillating loop : ponderomotive force and rain excited oscillations
... the loop, the inertia of the rain creates a centrifugal acceleration that moves the coronal loop radially ...a coronal loop moves the loop ...the loop with respect to the ...
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Contribution of phase mixing of Alfvén waves to coronal heating in multi harmonic loop oscillations
... Secondly, when the kink oscillation kinetic energy is dis- tributed among multiple harmonics, the heating process is less effective if KHI is also involved in the process. In fact, we found that the coherent motion of ...
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Transverse oscillations of coronal loops
... transverse coronal loop oscillations were first used for coronal seismology by Nakariakov and Ofman ...a coronal loop with the length L ≈ 130 ...the loop was estimated to ...
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Sausage oscillations of coronal loops
... the theoretical description of sausage modes is based upon modelling of the oscillating loop as a magnetic cylinder or a magnetic slab, confined between two rigid walls corresponding to the surface of the ...
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