Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mast.conf..166g&link_type=abstract
Magnetic stars, Proceedings of the International Conference, held in the Special Astrophysical Observatory of the Russian AS, Au
Astronomy and Astrophysics
Astrophysics
1
Magnetic Fields, Numerical, Profiles
Scientific paper
The phase curves of the integral magnetic field strength and the phase-dependent line profiles in the four polarization modes are calculated and graphically demonstrated using the method of modeling magnetic field structures on the surface of a star by the Magnetic Charge Distribution (MCD). Phase curves and line profiles are analytically represented by convolution integrals, which allow the linear superposition of elementary relations derived from single magnetic sources as the generating constituents of any complex magnetic field. Usually, the infiuence of the geometrical conditions of vision on the line profile, basically shaped by radiative transfer through the stellar atmosphere, has been neglected. The magnetic field distribution over the surface strongly affects the shape of the line profiles. It leads to asymmetric profiles with high uncertainty in practical measurement of magnetic fields by Zeeman displacement of spectral lines.
Gerth Ewald
Glagolevskij Yu. V.
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