Structure, internal motion and oscillation of a quiescent prominence.
Abstract
Series of Hα spectra and slit-jaw Hα filtergrams of a quiescent prominence are studied. The prominence consists of several arches. One of the arches oscillates with a frequency ω = 3·10-4s and shows displacement of ±55.8 km in the line of sight direction. Its internal velocity variations are larger near the periphery of the arch. The sign and magnitude of the velocity depend strongly on the position along the slit. For interpretation of these results a model of secondary plasma flow generated by bending oscillation propagating along the arch is developed.
- Publication:
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JOSO Annu. Rep., 1998
- Pub Date:
- 1999
- Bibcode:
- 1999joso.proc..122D
- Keywords:
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- Solar Prominences: Structure;
- Solar Prominences: Internal Motions;
- Solar Prominences: Oscillations