Oscillatory Reconnection of a 2D X-point in a hot coronal plasma
arXiv:2112.05712 · doi:10.3847/1538-4357/ac3b53
Abstract
Oscillatory reconnection (a relaxation mechanism with periodic changes in connectivity) has been proposed as a potential physical mechanism underpinning several periodic phenomena in the solar atmosphere including, but not limited to, quasi-periodic pulsations (QPPs). Despite its importance, however, the mechanism has never been studied within a hot, coronal plasma. We investigate oscillatory reconnection in a one million Kelvin plasma by solving the fully-compressive, resistive MHD equations for a 2D magnetic X-point under coronal conditions using the PLUTO code. We report on the resulting oscillatory reconnection including its periodicity and decay rate. We observe a more complicated oscillating profile for the current density compared to that found for a cold plasma, due to mode-conversion at the equipartition layer. We also consider, for the first time, the effect of adding anisotropic thermal conduction to the oscillatory reconnection mechanism, and we find this simplifies the spectrum of the oscillation profile and increases the decay rate. Crucially, the addition of thermal conduction does not prevent the oscillatory reconnection mechanism from manifesting. Finally, we reveal a relationship between the equilibrium magnetic field strength, decay rate, and period of oscillatory reconnection, which opens the tantalising possibility of utilizing oscillatory reconnection as a seismological tool.
arXiv comment17 pages, 13 figures, accepted for publication in ApJ
References in corpus (49)
- PLUTO: a Numerical Code for Computational Astrophysics
- The PLUTO Code for Adaptive Mesh Computations in Astrophysical Fluid Dynamics
- Modelling Quasi-Periodic Pulsations in Solar and Stellar Flares
- Giant Chromospheric Anemone Jet Observed with Hinode and Comparison with Magnetohydrodynamic Simulations: Evidence of Propagating Alfven Waves and Magnetic Reconnection
- Generation of Solar Spicules and Subsequent Atmospheric Heating
- Do Kepler superflare stars really include slowly-rotating Sun-like stars ? - Results using APO 3.5m telescope spectroscopic observations and Gaia-DR2 data -
- Quasi-periodic pulsations in solar and stellar flares: an overview of recent results
- Nonlinear Fast Magnetoacoustic Wave Propagation in the Neighbourhood of a 2D magnetic X-point: Oscillatory Reconnection
- Quasi-periodic Propagating Signals in the Solar Corona: The Signature of Magnetoacoustic Waves or High-Velocity Upflows?
- The importance of magnetic-field-oriented thermal conduction in the interaction of SNR shocks with interstellar clouds
- MHD wave propagation in the neighbourhood of a two-dimensional null point
- Review article: MHD wave propagation near coronal null points of magnetic fields
- Three-dimensional oscillatory magnetic reconnection
- Generation of quasi-periodic waves and flows in the solar atmosphere by oscillatory reconnection
- Statistical Study of GOES X-ray Quasi-Periodic Pulsations in Solar Flares
- A new view of quiet-Sun topology from Hinode/SOT
- Flaring activity of Proxima Centauri from TESS observations: quasi-periodic oscillations during flare decay and inferences on the habitability of Proxima b
- On the Periodicity of Oscillatory Reconnection
- MHD mode coupling in the neighbourhood of a 2D null point
- Reconnection-Driven Coronal-Hole Jets with Gravity and Solar Wind
- A quasi-periodic fast-propagating magnetosonic wave associated with the eruption of a magnetic flux rope
- Detection of a giant flare displaying quasi-periodic pulsations from a pre-main sequence M star with NGTS
- MHD Wave Propagation in the Neighbourhood of Two Null Points
- Magnetohydrodynamics wave propagation in the neighbourhood of two dipoles
- Interchange Reconnection Alfven Wave Generation
- A Compact Source for Quasi-Periodic Pulsation in an M-class Solar Flare
- Simultaneous Kepler/K2 and XMM-Netwon observations of superflares in the Pleiades
- Quasi-Periodic Particle Acceleration in a Solar Flare
- MHD wave propagation from the sub-photosphere to the corona in an arcade-shaped magnetic field with a null point
- Low-frequency Alfven Waves Produced by Magnetic Reconnection in the Sun's Magnetic Carpet
- Detection of flare multi-periodic pulsations in mid-ultraviolet Balmer continuum, Ly-alpha, hard X-ray, and radio emissions simultaneously
- Preflare very long-periodic pulsations observed in Halpha emission before the onset of a solar flare
- Observation of a reversal of breakout reconnection preceding a jet: evidence of oscillatory magnetic reconnection?
- Properties of quasi-periodic pulsations in solar flares from a single active region
- Quasi-periodic pulsation detected in Lyman-alpha emission during solar flares
- Possible Generation Mechanism for Compressional Alfvénic Spikes as Observed by Parker Solar Probe
- Relationship of type III radio bursts with quasi-periodic pulsations in a solar flare
- On the periodicity of linear and nonlinear oscillatory reconnection
- TESS observations of flares and quasi-periodic pulsations from low mass stars and potential impact on exoplanets
- Linear and nonlinear MHD mode coupling of the fast magnetoacoustic wave about a 3D magnetic null point
- Periodicities in an active region correlated with Type III radio bursts observed by Parker Solar Probe
- Implosive collapse about magnetic null points: A quantitative comparison between 2D and 3D nulls
- Rapid Evolution of Type II Spicules Observed in Goode Solar Telescope On-Disk H-alpha Images
- 3D Alfven wave behaviour around proper and improper magnetic null points
- High frequency waves in the corona due to null points
- Simulated interaction of MHD shock waves with a complex network-like region
- Multi-waveband detection of quasi-periodic pulsations in a stellar flare on EK Draconis observed by XMM-Newton
- Possible evidence of induced repetitive magnetic reconnection in a superflare from a young solar-type star
- Resistively-limited current sheet implosions in planar anti-parallel (1D) and null-point containing (2D) magnetic field geometries
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- Quasi-periodic Accelerations of Energetic Particles during a Solar Flare
- Oscillatory reconnection as a plasma diagnostic in the solar corona
- Localizing quasi-periodic pulsations in hard X-ray, microwave and Lya emissions of an X6.4 Flare
- Oscillatory reconnection and waves driven by merging magnetic flux ropes in solar flares
- Numerical study of solar eruption, extreme-ultraviolet wave propagation, and wave-induced prominence dynamics
- The effects of resistivity on oscillatory reconnection and consequences for solar flare Quasi Periodic Pulsations
- Extreme-ultraviolet (EUV) observables of simulated plasmoid-mediated reconnection in the solar corona
- Self-similar solutions of oscillatory reconnection: parameter study of magnetic field strength and background temperature
- The periodicity of three-dimensional oscillatory reconnection
- The independence of oscillatory reconnection periodicity from the initial pulse