Low Atmosphere Reconnections Associated With An Solar Eruption

Yong-Jae Moon, Jongchul Chae, Young-Deuk Park

We studied an X1.8 flare and its associated filament eruption that occurred in AR 9236 on November 24, 2000. For this work we have analyzed high tempposter (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 end of the erupting filament and were associated with canceling magnetic features (CMFs). The flux variations suggest that the flux cancellation may have been drive by the flux emergence. For this event, we estimated the ejection speeds of the 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 less than 20 km/s) coincided with the preflare activity characterized by UV brightenings and CMFs. Our results support that the initiation of the filament eruption and the preflare phase of the associated flare be physically related to low-atmosphere magnetic reconnection.

Correspondence

Yong-Jae Moon, Korea Astronomy and Space Science Institute

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