Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246..469f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 2, June 1991, p. 469-480.
Astronomy and Astrophysics
Astrophysics
40
Atomic Energy Levels, Linear Polarization, Optical Thickness, Resonance Lines, Fourier Series, Magnetic Fields, Quantum Theory
Scientific paper
The Hanle effect on optically thick resonance lines formed with partial frequency redistribution is investigated. In order to take into account partial frequency redistribution, two numerical methods were used for solving directly the vectorial transfer equation with Hanle effect for a two-level atom in a 1D medium: (1) a generalization of the Feautrier method and (2) a method that relies on a Fourier expansion of the radiation field with respect to the azimuth of the direction of propagation. Complete and partial frequency redistribution results are compared, and the effect of partial frequency redistribution on the determination of magnetic fields by means of the Hanle effect is evaluated.
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