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Solar Magnetized Tornadoes: Rotational Motion in a Tornado-like Prominence View all abstracts by submitter

Yang Su   Submitted: 2013-12-20 06:56

Su et al. 2012 proposed a new explanation for filament formation and eruption, where filament barbs are rotating magnetic structures driven by underlying vortices on the surface. Such structures have been noticed as tornado-like prominences when they appear above the limb. They may play a key role as the source of plasma and twist in filaments. However, no observations have successfully distinguished rotational motion of the magnetic structures in tornado-like prominences from other motions such as oscillation and counter-streaming plasma flows. Here we report evidence of rotational motions in a tornado-like prominence. The spectroscopic observations in two coronal lines were obtained from a specifically designed Hinode/EIS observing program. The data revealed the existence of both cold and million-degree-hot plasma in the prominence leg, supporting the so-called ``the prominence-corona transition region''. The opposite velocities at the two sides of the prominence and their persistent time evolution, together with the periodic motions evident in SDO/AIA dark structures, indicate a rotational motion of both cold and hot plasma with a speed of ∼5 km s-1.

Authors: Yang Su, Peter G"{o}m"{o}ry, Astrid Veronig, Manuela Temmer, Tongjiang Wang, Kamalam Vanninathan, Weiqun Gan, Youping Li
Projects: Hinode/EIS,Other,SDO-AIA

Publication Status: accepted by ApJL
Last Modified: 2014-03-17 17:34
Go to main E-Print page  Study of Two Successive Three-Ribbon Solar Flares on 2012 July 6  Variation of the solar magnetic flux spectrum during solar cycle 23  Edit Entry  Download Preprint  Delete Entry 

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