SIMULTANEOUS OBSERVATION OF RECONNECTION INFLOW AND OUTFLOW ASSOCIATED WITH THE 2010 AUGUST 18 SOLAR FLARE
By S. Takasao, Ayumi Asai, H. Isobe, Kazunari Shibata. 2011
133 citations recorded by the source corpus.
We report the simultaneous extreme-ultraviolet observation of magnetic reconnection inflow and outflow in a flare on 2010 August 18 observed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. We found that during the rise phase of the flare, some plasma blobs appeared in the sheet structure above the hot loops. The plasma blobs were ejected bidirectionally along the sheet structure (outflow), at the same time as the threads visible in extreme-ultraviolet images moved toward the sheet structure (inflow). The upward and downward ejection velocities are 220–460 km s−1 and 250–280 km s−1, respectively. The inflow speed changed from 90 km s−1 to 12 km s−1 in 5 minutes. By using these velocities, we estimated the nondimensional reconnection rate, which we found to vary during this period from 0.20 to 0.055. We also found that the plasma blobs in the sheet structure collided or merged with each other before they were ejected from the sheet structure. We hypothesize that the sheet structure is the current sheet and that these plasma blobs are plasmoids or magnetic islands, which could be important for understanding the dynamics of the reconnection region.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/019157a8a116312e3044f0787d5029db7f0ceed1
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In Astronomy and Astrophysics
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Citations in the corpus
- Imaging coronal magnetic-field reconnection in a solar flare (2013, background): “RHESSI X-ray fluxes(30) are shown as red (blue) contours in the 4-10 (10-20) keV bands at 10, 40, and 80% of the maximum in each image.”
- Modelling Quasi-Periodic Pulsations in Solar and Stellar Flares (2018, background): “The coalescence of plasmoids were actually observed (Takasao et al. 2012).”
- PLASMOID EJECTIONS AND LOOP CONTRACTIONS IN AN ERUPTIVE M7.7 SOLAR FLARE: EVIDENCE OF PARTICLE ACCELERATION AND HEATING IN MAGNETIC RECONNECTION OUTFLOWS (2013, background): “…magnetic reconnection inflows (Yokoyama et al. 2001; Milligan et al. 2010; Liu et al. 2010), outflows (Innes et al. 1997; Ko et al. 2003; Wang et al. 2007; Nishizuka et al. 2010; Hara et al. 2011; Watanabe et al. 2012), or both (Lin et al. 2005; Takasao et al. 2012; Savage et al. 2012).”
- Observations of Turbulent Magnetic Reconnection within a Solar Current Sheet (2018, background): “…as cusp-shaped flare loops (Masuda et al. 1994), inflows and downflows near the reconnection region (Yokoyama et al. 2001; Savage & McKenzie 2011; Takasao et al. 2012; Liu et al. 2013; Liu 2013; Xue et al. 2016), double hard X-ray coronal sources (Sui & Holman 2003), and changes of connectivity…”