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| Paper: |
Low Atmosphere Reconnections Associated with a Filament Eruption |
| Volume: |
369, New Solar Physics with Solar-B Mission |
| Page: |
425 |
| Authors: |
Moon, Y.-J.; Chae, J.; Park, Y.D. |
| Abstract: |
We present preflare activity associated with an eruptive flare. For this work we have analyzed high temporal (about 1 minute) and spatial (about 1 arcsec) resolution images taken by SOHO/MDI, BBSO H-alpha centerline and blue wing, and TRACE 1600 UV images. We found that there were several transient brightenings seen around the preflare phase. They took place near one footpoint of the filament and were associated with cancelling magnetic features (CMFs) as well as recurrent EUV ejections. The flux variations suggest that the flux cancellation may have been driven by the flux emergence and/or shearing motions. The above results imply that the preflare activity is caused by low-atmospheric reconnections. For this event, we estimated the ejection speeds of the associated filament ranging from 10 to 160 km/s for the first twenty minutes. It is noted that the initiation of the filament eruption (as defined by the rise speed of about 10 km/s) was coincident with the preflare activity characterized by UV brightenings and CMFs. Our results support that the initiation of the filament eruption be physically related to low-atmosphere magnetic reconnection. |
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