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Magnetic Stereoscopy of Coronal Loops in NOAA 8891 View all abstracts by submitter

Li Feng   Submitted: 2007-06-04 03:19

The Solar TErrestrial RElations Observatory (STEREO) requires powerful tools for the three-dimensional (3D) reconstruction of the solar corona. Here we test such a program with data from SOHO and TRACE. By taking advantage of solar rotation, a newly developed stereoscopy tool for the reconstruction of coronal loops is applied to the solar active region NOAA 8891 observed from 1 March to 2 March 2000. The stereoscopic reconstruction is composed of three steps. First, we identify loop structures in two TRACE images observed from two vantage viewpoints approximately 17 degrees apart, which corresponds to observations made about 30 hours apart. In the second step, we extrapolate the magnetic field in the corona with the linear force-free field model from the photospheric line-of-sight SOHO/MDI data. Finally, combining the extrapolated field lines and one-dimensional loop curves from two different viewpoints, we obtain the 3D loop structures with the magnetic stereoscopy tool. We demonstrate that by including the magnetic modeling this tool is more powerful than pure geometrical stereoscopy, especially in resolving the ambiguities generated by classical stereoscopy. This work will be applied to the STEREO mission in the near future.

Authors: L. Feng , T. Wiegelmann, B. Inhester, S. Solanki, W. Q. Gan and P. Ruan
Projects: STEREO

Publication Status: Solar Physics (2007), 241:235-249
Last Modified: 2007-06-04 14:37
Go to main E-Print page  EVIDENCE THAT SYNCHROTRON EMISSION FROM NONTHERMAL ELECTRONS PRODUCES THE INCREASING SUBMILLIMETER SPECTRAL COMPONENT IN SOLAR FLARES  Grand minima and maxima of solar activity: New observational constraints  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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