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Centro de Astrofísica da Universidade do Porto

Comparison of images derived from independent Zeeman Doppler imaging codes

G. A. J. Hussain, J.-F. Donati, A. Collier Cameron, J. R. Barnes

Abstract
We compare surface brightness and magnetic field surface maps for the K0 dwarf AB Doradus, obtained using two independently developed Zeeman Doppler imaging codes. We find that even the fine structure in the two sets of images shows excellent agreement. Magnetic field maps appear to be less sensitive to line-modelling effects than brightness maps. We argue that these results point to the consistency and reliability of Doppler imaging techniques even when using poorly sampled data sets, provided that the spectra used are of sufficiently high signal-to-noise ratio.

Monthly Notices of the Royal Astronomical Society
Volume 318, Page 961
November 2000

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