Statistical Analysis of Reconnection Inflows in Solar Flares Observed with SOHO EIT

We report observations of reconnection inflows in extreme ultraviolet (EUV) Fe XII l195 images with the Extreme Ultraviolet Imaging Telescope (EIT) on board the Solar and Heliospheric Observatory (SOHO). Yokoyama and colleagues reported the first example observed on 1999 March 18. We survey the EIT...

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Veröffentlicht in:The Astrophysical journal 2006-02, Vol.637 (2), p.1122-1134
Hauptverfasser: Narukage, Noriyuki, Shibata, Kazunari
Format: Artikel
Sprache:eng
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Zusammenfassung:We report observations of reconnection inflows in extreme ultraviolet (EUV) Fe XII l195 images with the Extreme Ultraviolet Imaging Telescope (EIT) on board the Solar and Heliospheric Observatory (SOHO). Yokoyama and colleagues reported the first example observed on 1999 March 18. We survey the EIT data from 1996 to 2000 and find six new inflow events. We measure the inflow velocity v sub(inflow) for each event and find that v sub(inflow) is about 2.6-38 km s super(-1). Furthermore, using the six EIT inflow events observed simultaneously with Yohkoh SXT (including the Yokoyama event), we calculate the reconnection rate as M sub(A) = v sub(inflow)/v sub(A) = 0.001-0.07. It is also found that the plasmoid ejection and/or coronal mass ejection (CME) are closely related to the inflow. The velocity of the CME exhibits a correlation with the inflow velocity.
ISSN:0004-637X
1538-4357
DOI:10.1086/498492