Fig. 6

Variations of the mean longitudinal magnetic field of HD 24712 phased according to the revised rotational period. Different symbols correspond to the following data sets: HARPSpol (diamonds), Ryabchikova et al. (1997) (open circles), Mathys (1994) and Mathys & Hubrig (1997) (asterisks), Leone & Catanzaro (2004) (squares), measurements from TiCrFe lines by Preston (1972) (pluses), Wade et al. (2000a) and Ryabchikova et al. (2005) (filled circles), Ryabchikova et al. (2007) (triangles). The solid line represents a fourth-order Fourier fit to the longitudinal field measurements.
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