Magnetic Fields in Prominences: Inversion Techniques for Spectropolarimetric Data of the He I D3 Line

Details Magnetic Fields in Prominences: Inversion Techniques for Spectropolarimetric Data of the He I D3 Line Magnetic Fields in Prominences: Inversion Techniques for Spectropolarimetric Data of the He I D3 Line

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...575..529l&link_type=abstract

The Astrophysical Journal, Volume 575, Issue 1, pp. 529-541.

Astronomy and Astrophysics

Astronomy

47

Line: Profiles, Polarization, Sun: Magnetic Fields, Sun: Prominences

Scientific paper

We propose the use of principal component analysis (PCA) to invert spectropolarimetric data from prominences. Observation of the full Stokes profiles in prominences is very important for a deeper understanding of magnetic-field topology in these solar structures, and for the testing of theoretical models. The line formation problem, however, is complicated by the special conditions of prominences: anisotropy of light, low magnetic intensities, temperature and density ranges, etc. We created a code to solve this problem in the limit of optically thin plasma and of a collisionless regime, and use it in combination with PCA techniques to invert synthetic data. The results show that inversion is feasible.

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