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| Paper: |
Structure and Dynamics of Quiescent Prominence Eruptions |
| Volume: |
456, The Fifth Hinode Science Meeting |
| Page: |
165 |
| Authors: |
Su, Y.; Lu, M.; van Ballegooijen, A. |
| Abstract: |
We present a survey on the fine structure and dynamics of quiescent prominence eruptions observed both
on the disk and at the limb. We have identified 45 quiescent prominence eruptions by looking at the SDO (Solar Dynamics Observatory)/AIA (Atmospheric Imaging Assembly) daily movies from April to June in 2011. Among these events, there are 24 symmetric eruptions (coherent loop-like eruptions) and 21 asymmetric eruptions (one footpoint lifts off) as shown by AIA and STEREO/EUVI observations. Vertical filament threads are identified in 10 out of the 45 events, while horizontal threads are observed in almost all eruptions. We find 23 events with twisting/untwisting motions. For 14 selected limb events, we carry out a detailed study of the eruption dynamics using AIA observations at 304 Å. We find that the initial
heights of these erupting prominences are located around 50–110 Mm above the limb. The eruptions start from a
speed of less than 5 km/s, then increase to several tens km/s in the AIA field of view. The maximum speed
of these events is 50 km/s. The acceleration plots show a positive acceleration in the range of 0 to 20 m/s2. No significant
difference is identified in the dynamics of the symmetric and asymmetric eruptions. |
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