First Stereoscopic Coronal Loop Reconstructions from Stereo Secchi Images

Details First Stereoscopic Coronal Loop Reconstructions from Stereo Secchi Images First Stereoscopic Coronal Loop Reconstructions from Stereo Secchi Images

2008-02-06

arxiv.org/abs/0802.0773v1

2007ApJ...671L.205F

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures

Scientific paper

10.1086/525525

We present the first reconstruction of the three-dimensional shape of magnetic loops in an active region from two different vantage points based on simultaneously recorded images. The images were taken by the two EUVI telescopes of the SECCHI instrument onboard the recently launched STEREO spacecraft when the heliocentric separation of the two space probes was 12 degrees. We demostrate that these data allow to obtain a reliable three-dimensional reconstruction of sufficiently bright loops. The result is compared with field lines derived from a coronal magnetic field model extrapolated from a photospheric magnetogram recorded nearly simultaneously by SOHO/MDI. We attribute discrepancies between reconstructed loops and extrapolated field lines to the inadequacy of the linear force-free field model used for the extrapolation.

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