Observations of the Formation, Development, and Structure of a Current Sheet in an Eruptive Solar Flare

Abstract

We present AIA observations of a structure we interpret as a current sheet associated with an X4.9 flare and coronal mass ejection that occurred on 2014~February~25 in NOAA Active Region 11990. We characterize the properties of the current sheet, finding that the sheet remains on the order of a few thousand km thick for much of the duration of the event and that its temperature generally ranged between $8-10\mathrm{MK}$. We also note the presence of other phenomena believed to be associated with magnetic reconnection in current sheets, including supra-arcade downflows and shrinking loops. We estimate that the rate of reconnection during the event was $M_A\approx 0.004-0.007$, a value consistent with model predictions. We conclude with a discussion of the implications of this event for reconnection-based eruption models.

arXiv commentAnimation accompanying Figure 2 available at https://figshare.com/articles/SDO_AIA_131_2014-Feb-25_Current_Sheet/4052061

References in corpus (19)

• Differential Emission Measure Analysis of Multiple Structural Components of Coronal Mass Ejections in the Inner Corona
• Observing Flux Rope Formation During the Impulsive Phase of a Solar Eruption
• Reconnection Outflows and Current Sheet Observed with Hinode/XRT in the 2008 April 9 "Cartwheel CME" Flare
• The SWAP EUV Imaging Telescope Part I: Instrument Overview and Pre-Flight Testing
• Turbulence, Magnetic Reconnection in Turbulent Fluids and Energetic Particle Acceleration
• Re-interpretation of Supra-Arcade Downflows in Solar Flares
• Above-the-loop-top Oscillation and Quasi-periodic Coronal Wave Generation in Solar Flares
• Quantitative Examination of a Large Sample of Supra-Arcade Downflows in Eruptive Solar Flares
• The SWAP EUV Imaging Telescope. Part II: In-flight Performance and Calibration
• Direct Observations of Tether-cutting Reconnection During a Major Solar Event From 2014 February 24 to 25
• Low-Altitude Reconnection Inflow-Outflow Observations during a 2010 November 3 Solar Eruption
• Observations of Reconnecting Flare Loops with the Atmospheric Imaging Assembly (AIA)
• Evolution of a Current Sheet in a Solar Flare
• SWAP Observations of the Long-Term, Large-Scale Evolution of the EUV Solar Corona
• Bridging EUV and white-light observations to inspect the initiation phase of a "two-stage" solar eruptive event
• SWAP Observations of Post-flare Giant Arches in the Long-Duration 14 October 2014 Solar Eruption
• Slow shocks and conduction fronts from Petschek reconnection of skewed magnetic fields: two-fluid effects
• Plasma heating in a post eruption Current Sheet: a case study based on ultraviolet, soft, and hard X-ray data
• Peristaltic Pumping near Post-CME Supra-Arcade Current Sheets

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• Spectroscopic Observations of Current Sheet Formation and Evolution
• Observations of Turbulent Magnetic Reconnection Within a Solar Current Sheet
• Origin and Structures of Solar Eruptions I: Magnetic Flux Rope (Invited Review)
• Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)
• Initiation and Early Kinematic Evolution of Solar Eruptions
• Observations of an Eruptive Solar Flare in the Extended EUV Solar Corona
• Spectroscopic Observations of a Current Sheet in a Solar Flare
• Magnetic Reconnection Null Points as the Origin of Semi-relativistic Electron Beams in a Solar Jet
• Subarcsecond blobs in flare-related coronal jets
• The Sun's Dynamic Extended Corona Observed in Extreme Ultraviolet
• Reconnection in the Post-Impulsive Phase of Solar Flares
• Spectroscopic observations of a flare-related coronal jet
• Non-ideal magnetohydrodynamics on a moving mesh
• Modeling a Propagating Sawtooth Flare Ribbon Structure as a Tearing Mode in the Presence of Velocity Shear
• Non-equilibrium Ionization Modeling of Petschek-type Shocks in Reconnecting Current Sheets in Solar Eruptions
• Two-dimensional modeling of the tearing-mode-governed magnetic reconnection in the large-scale current sheet above the two-ribbon flare
• The SWAP Filter: A Simple Azimuthally Varying Radial Filter for Wide-Field EUV Solar Images
• Modeling Hadronic Gamma-ray Emissions from Solar Flares and Prospects for Detecting Non-thermal Signatures from Protostars
• Observations of the Current Sheet Heating in X-ray during a Solar Flare