2016/10/21 by Daniel B. Seaton, Allison E. Bartz, Jonathan M. Darnel +1 · 41 citations
Physics and Astronomy · #Astrophysics #Coronal mass ejection #Current (fluid) #Current sheet #Event (particle physics) #Flare #Ionosphere and magnetosphere dynamics #Magnetic reconnection #Magnetohydrodynamics #Nanoflares #Nuclear physics #Physics #Plasma #Solar and Space Plasma Dynamics #Solar flare #Solar wind #Stellar, planetary, and galactic studies #astro-ph.SR
paper · pdf · doi:10.3847/1538-4357/835/2/139
published in The Astrophysical Journal 835(2), 139 (IOP Publishing) · Animation accompanying Figure 2 available at https://figshare.com/articles/SDO_AIA_131_2014-Feb-25_Current_Sheet/4052061
arxiv created 2016/10/21 · openalex publication_date 2017/01/23 · arxiv updated 2017/02/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract We present Atmospheric Imaging Assembly 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 kilometers thick for much of the duration of the event and that its temperature generally ranged between 8 and 10 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 ≈ 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.