| Name | Jain Jacob |
| Affiliation | National Institute of Technology, Calicut |
| Title | Torsional Motion and Short-Period Oscillations in a Quiescent Prominence |
| Authors | Jain Jacob P. T. & R.A. Maurya |
| Abstract | Solar prominences are consist of cool and dense plasma surrounded by hot atmosphere. The high-resolution observations provided by the Atmospheric Imaging Assembly (AIA) onboard Solar Dynamical Observatory (SDO) and Interface Region Imaging Spectroscopy (IRIS) is used to study the dynamical properties of a large scale prominence. One of the prominence legs, exhibit tortional motion, is investigated using time-slices of intensity images across the prominence legs and Local Correlation Tracking (LCT) of SDO/AIA observations. It undergoes clockwise rotation followed by an anti-clockwise movement indicating torsional motion. We found large scale rotation confirmed by the blue and redshift in the Doppler velocities in the prominence's upper part. The power spectrum using IRIS slit-jaw imaging observations of Mg II k 2796Å and Si IV 1394Å are constructed to study the oscillatons within the prominence structure. An oscillatory motion of 7-11 minutes is detected from the wavelet analysis also, which may be associated with Alfven waves propagating along magnetic flux tubes. |
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