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The Art of Surface Imaging

Published online by Cambridge University Press:  12 April 2016

N.E. Piskunov
N.E. Piskunov*
Affiliation:
Astronomical Council of the USSR Academy of Sciences, Moscow, USSR and Observatory and Astrophysics Laboratory, University of Helsinki, Finland

Abstract

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We intend to analyze the reliability of surface imaging of stars based on high resolution spectroscopy and the technique of inverse problem solution. Both astrophysical and mathematical aspects including different regularization methods are reviewed. The influence of the different factors on the resulting map is discussed and it is shown that the simultaneous use of different kinds of observational data (spectroscopy, photometry, polarimetry etc.) is very useful in providing additional constraints for the solution. The recent results in the surface imaging of Cp- and late-type stars show the way for further progress: the use of more adequate mathematical description of the stellar atmosphere and the simultaneous consideration of various surface inhomogeneities.

Type
Part IV Stellar activity
Information
International Astronomical Union Colloquium , Volume 130: The Sun and Cool Stars: activity, magnetism, dynamos , 1991 , pp. 309 - 320
Copyright
Copyright © Springer-Verlag 1991

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