Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975azh....52...71s&link_type=abstract
Astronomicheskii Zhurnal, vol. 52, no. 1, 1975, p. 71-80. In Russian.
Astronomy and Astrophysics
Astronomy
Absorption Spectra, Magnetic Stars, Optical Polarization, Stellar Spectra, Zeeman Effect, Circular Polarization, Faraday Effect, Fine Structure, Line Spectra, Spectral Line Width, Stellar Magnetic Fields, Thermodynamic Equilibrium
Scientific paper
Polarization of absorption lines is analyzed under conditions of local thermodynamic equilibrium in a magnetic field. It is noted that the polarization and line profiles depend considerably on the values of normal and anomalous dispersion, in particular Faraday rotation of the plane of linear polarization in the magnetically active plasma of a stellar atmosphere. Equations are obtained for the profiles of the blue, central, and red components of the normal Zeeman triplet for the case of strong Faraday rotation in a homogeneous magnetic field. The expressions are shown to differ from formulas obtained without accounting for dispersion. High-resolution spectropolarimetric observations of the 4254-A line in the spectrum of beta CrB are analyzed to test the validity of the obtained equations.
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