Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...358.1151m&link_type=abstract
Astronomy and Astrophysics, v.358, p.1151-1156 (2000)
Astronomy and Astrophysics
Astrophysics
12
Line: Formation, Polarization, Radiative Transfer, Stars: Atmospheres, Stars: Magnetic Fields
Scientific paper
We have completed a new study of the formation of hydrogen lines in dense magnetized plasmas. We have developed a global formalism including the effects of the magnetic field and of the motional electric field. The latter, resulting from the motion of the radiating hydrogen atom in the magnetic field, modifies the structure of the matrices appearing in the equation of transfer of the Stokes vector and introduces a coupling between microscopic (``intrinsic'') and macroscopic (Doppler) contributions to the line profiles. We have used this new treatment of line formation to revisit the interpretation of photopolarimetric (Stokes I and V) observations of Balmer lines in terms of mean longitudinal magnetic field.
Brillant Stéphane
Lanz Thierry
Mathys Gautier
Stehlé Chantal
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