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
presentation
poster