Comparisons of images derived from independent Zeeman Doppler imaging codes |
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| Authors: | G A J Hussain J-F Donati A Collier Cameron J R Barnes |
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| Institution: | School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS;Laboratoire d'Astrophysique, Observatoire Midi-Pyrénées, F–31400 Toulouse, France;Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, 4150 Porto, Portugal |
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| 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. |
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| Keywords: | polarization stars: activity stars: imaging stars: individual: HD 36705 stars: late-type stars: magnetic fields |
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