GONG Catalog of Solar Filament Oscillations Near Solar Maximum

Abstract

We have catalogued 196 filament oscillations from the GONG $H\alpha$ network data during several months near the maximum of solar cycle 24 (January - June 2014). Selected examples from the catalog are described in detail, along with our statistical analyses of all events. Oscillations were classified according to their velocity amplitude: 106 small-amplitude oscillations (SAOs), with velocities $<10\mathrm{km}{\mathrm{s}}^{-1}$, and 90 large-amplitude oscillations (LAOs), with velocities $>10\mathrm{km}{\mathrm{s}}^{-1}$. Both SAOs and LAOs are common, with one event of each class every two days on the visible side of the Sun. For nearly half of the events we identified their apparent trigger. The period distribution has a mean value of 58$\pm$15 min for both types of oscillations. The distribution of the damping time per period peaks at $\tau /P=1.75$ and $1.25$ for SAOs and LAOs respectively. We confirmed that LAO damping rates depend nonlinearly on the oscillation velocity. The angle between the direction of motion and the filament spine has a distribution centered at $27^{\circ }$ for all filament types. This angle agrees with the observed direction of filament-channel magnetic fields, indicating that most of the catalogued events are longitudinal (i.e., undergo field-aligned motions). We applied seismology to determine the average radius of curvature in the magnetic dips, $R\approx 89$ Mm, and the average minimum magnetic-field strength, $B\approx 16$ G. The catalog is available to the community online, and is intended to be expanded to cover at least 1 solar cycle.

Accepted for publication in The Astrophysical Journal Supplement Series

References in corpus (21)

• Large Amplitude Longitudinal Oscillations in a Solar Filament
• Large amplitude oscillation of a polar crown filament in the pre-eruption phase
• A Chain of Winking (Oscillating) Filaments Triggered by an Invisible Extreme-Ultraviolet Wave
• Simultaneous Transverse Oscillations of a Prominence and a Filament and Longitudinal Oscillation of another Filament Induced by a Single Shock Wave
• Observations and Implications of Large-Amplitude Longitudinal Oscillations in a Solar Filament
• SOHO/SUMER Observations of Prominence Oscillation Before Eruption
• Large amplitude oscillatory motion along a solar filament
• Damping of Fast Magnetohydrodynamic Oscillations in Quiescent Filament Threads
• Multicomponent He I 10830 Å profiles in an active filament
• Morphology and dynamics of solar prominences from 3D MHD simulations
• Transverse oscillations of two coronal loops
• Large-Amplitude Oscillation of an Erupting Filament as Seen in EUV, H-alpha and Microwave Observations
• Large-Amplitude Longitudinal Oscillations Triggered by the Merging of Two Solar Filaments: Observations and Magnetic Field Analysis
• On the robustness of the pendulum model for large-amplitude longitudinal oscillations in prominences
• Large-amplitude longitudinal oscillations in a solar filament
• Solar prominences embedded in flux ropes: morphological features and dynamics from 3D MHD simulations
• Solar Filament Longitudinal Oscillations along a Magnetic Field Tube with Two Dips
• Damping of prominence longitudinal oscillations due to mass accretion
• On the scaling of the damping time for resonantly damped oscillations in coronal loops
• Dynamics of a prominence-horn structure during its evaporation in the solar corona
• Prominence Activation by Coronal Fast Mode Shock

Cited by in corpus (28)

• The European Solar Telescope
• Double-Decker Filament Configuration Revealed by Mass Motions
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• Transverse coronal loop oscillations excited by homologous circular-ribbon flares
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• Vertical oscillation of a coronal cavity triggered by an EUV wave
• Oscillations and mass-draining that lead to a sympathetic eruption of a quiescent filament
• Numerical simulations of large-amplitude oscillations in flux-rope solar prominences
• Large-amplitude prominence oscillations following the impact by a coronal jet
• Damping Mechanisms of the Solar Filament Longitudinal Oscillations in Weak Magnetic Field
• Stereoscopic Observation of Simultaneous Longitudinal and Transverse Oscillations in a Single Filament Driven by Two-sided-loop Jet
• Dynamic formation of multi-threaded prominences in arcade configurations
• Continuous Solar Observations from the Ground -- Assessing Duty Cycle from GONG Observations
• 3D numerical simulations of oscillations in solar prominences
• Decayless longitudinal oscillations of a solar filament maintained by quasi-periodic jets
• Simultaneous longitudinal and transverse oscillations in filament threads after a failed eruption
• Simultaneous transverse oscillations of a coronal loop and a filament excited by a circular-ribbon flare
• Prominence Oscillations activated by an EUV wave
• Interaction of solar jets with filaments: Triggering of large-amplitude filament oscillations
• Study of the excitation of large amplitude oscillations in a prominence by nearby flares
• Extension and validation of the pendulum model for longitudinal solar prominence oscillations
• Exploration of long-period oscillations in an H$\alpha$ prominence
• Multi-threaded prominence oscillations triggered by a coronal shock wave
• Simulating Rayleigh-Taylor induced magnetohydrodynamic turbulence in prominences
• One dimensional prominence threads: I. Equilibrium models
• Automatic detection technique for solar filament oscillations in GONG data
• Fast Bayesian spectral analysis using Convolutional Neural Networks: Applications over GONG H$\alpha$ solar data
• Large-amplitude longitudinal oscillations in solar prominences simulated with different resolutions