Abstract
We study plasma flows in NOAA Active Region (AR) 10926, observed on
December 3, 2006 with Hinode's EUV Imaging Spectrograph (EIS). We
measured the line-of-sight velocity along coronal loops in the Fe VIII
185A, Fe X 184A , Fe XII 195A, Fe XIII 202A, and Fe XV 284A spectral
lines and reconstructed the three dimensional (3D) shape and velocity of
plasma flow using a simple geometrical model. In most cases the flow is
unidirectional from one footpoint to the other, resembling siphon flow.
However there are also cases of draining motions from the top of the
loops to their footpoints. The multi-wavelength observations of the AR
indicate that similar loops may show different flow patterns if observed
in different spectral lines. We have also carried out magnetic field
extrapolations using an SOHO/MDI and an SOT/Spectropolarimeter (SP)
magnetogram, in order to identify magnetic field lines corresponding to
the reconstructed 3D loops.
| Original language | English |
|---|---|
| Title of host publication | 10th Hellenic Astronomical Conference, Proceedings of the conference held at Ioannina, Greece, 5-8 September 2011. Edited by Iossif Papadakis and Anastasios Anastasiadis |
| Pages | 14-14 |
| Publication status | Published - 1 Jan 2012 |