Open AccessComparisons of images derived from independent Zeeman Doppler imaging codes
Author(s) -
Hussain G. A. J.,
Donati J.F.,
Collier Cameron A.,
Barnes J. R.
Publication year - 2000
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2000.03573.x
Subject(s) - physics , zeeman effect , brightness , doppler effect , doppler imaging , spectral line , magnetic field , line (geometry) , astrophysics , signal to noise ratio (imaging) , surface brightness , optics , astronomy , geometry , galaxy , medicine , diastole , quantum mechanics , blood pressure , radiology , mathematics
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.