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Automated Detection of EUV Prominences View all abstracts by submitter

Claire Foullon   Submitted: 2005-12-05 10:30

We present methods to detect automatically off-limb prominences in the EUV, using synoptic images taken by the Extreme-ultraviolet Imaging Telescope (EIT) on board SoHO. The 304A line is essential for the detection of EUV prominences, but the optimal detection is achieved through a combined image processing of the four synoptic EIT images. In addition, the difference between consecutive 304A images serves to identify erupted prominences. Representation maps of the quiescent EUV prominences for a given Carrington rotation are generated and used for further analysis of the detected structures. Longitudinal profiles of long-lived prominences are investigated for three examples at different latitudes, in conjunction with on-disk intensity profiles in the EUV. The observations coincide with theoretically predicted apparent longitudinal profiles, which can be distinguished from the profile of a prominence rising before eruption. The developed algorithms may be relevant to study the 3D geometry of features seen in the EUV and may facilitate the analysis of data from the future STEREO mission.

Authors: Foullon C. and Verwichte E.
Projects: Soho-EIT

Publication Status: Solar Physics 234, Issue 1, 135-150
Last Modified: 2006-02-27 10:55
Go to main E-Print page  A multi-wavelength study of the compact M1 flare on October 22, 2002  Fast relaxation of a sheared magnetic field during converging motion of H-alpha and HXR conjugate kernels  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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