Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...244..383b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 244, no. 2, April 1991, p. 383-390.
Astronomy and Astrophysics
Astrophysics
16
H Alpha Line, Linear Polarization, Optical Thickness, Radiative Transfer, Solar Prominences, Atomic Energy Levels, Iterative Solution, Magnetic Fields, Resonance, Zeeman Effect
Scientific paper
The results of computations of resonance polarization and the Hanle effect (weak magnetic field) for a two-level atom in a plane-parallel optically thick atmosphere and numerical methods for solving them are presented. The findings are compared with results yielded by other methods, of the differential method type, in zero magnetic field and under the hypothesis of complete frequency redistribution, and a good agreement is obtained. The novel computation method, called the 'global' method, is applied to test the validity of the results obtained by the iterative method. The result of the computations are finally presented in the form of Hanle diagrams for some magnetic field and line-of-sight geometries.
Bommier Veronique
Landi Degl'Innocenti Egidio
Sahal-Bréchot Sylvie
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