Three-dimensional magnetic and abundance mapping of the cool Ap star HD 24712 . I. Spectropolarimetric observations in all four Stokes parameters

  title={Three-dimensional magnetic and abundance mapping of the cool Ap star HD 24712 . I. Spectropolarimetric observations in all four Stokes parameters},
  author={Naum Rusomarov and Oleg Kochukhov and Nikolai Piskunov and S. V. Jeffers and Christopher M. Johns–Krull and Christoph U. Keller and Vitalii Makaganiuk and Michiel Rodenhuis and Frans Snik and Henricus Cornelis Stempels and Jeff A. Valenti},
  journal={Astronomy and Astrophysics},
Context. High-resolution spectropolarimetric observations provide simultaneous information about stellar magnetic field topologies and three-dimensional distributions of chemical elements. High-quality spectra in the Stokes IQUV parameters are currently available for very few early-type magnetic chemically peculiar stars. Here we present analysis of a unique full Stokes vector spectropolarimetric data set, acquired for the cool magnetic Ap star HD 24712 with a recently commissioned… 
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