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Doppler Mapping of CP-star Surfaces with Weak and Strong Magnetic Fields

Published online by Cambridge University Press:  12 April 2016

V.L. Khokhlova
V.L. Khokhlova*
Affiliation:
Astronomical Council of the USSR Academy of Sciences, Moscow, USSR

Extract

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A code for Doppler mapping of the distribution of chemical elements on stellar surfaces (Goncharskij et al., 1977, 1982) has been used during the past decade to make maps for several CP-stars. The code is based on Tikhonov’s method of solution of so-called ill-posed inverse problems and on an analytical expression of local line profiles in the form of the Milne-Eddington solution of the radiative transfer equation. This code takes into account the atmospheric model of the star through an assumed central depth of very strong and saturated lines, and through limb-darkening coefficients. As a solution one gets local line profiles and hence local equivalent widths.

Type
Part IV Stellar activity
Information
International Astronomical Union Colloquium , Volume 130: The Sun and Cool Stars: activity, magnetism, dynamos , 1991 , pp. 347 - 349
Copyright
Copyright © Springer-Verlag 1991

References

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