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Figure 1: Observed spectra of HE0241-0155 compared to the position of the hydrogen line components. The upper spectrum (obtained 28/11/98) with a resolution of 5 Å has been smoothed (second curve) in order to match the 15 Å resolution of the lower spectrum (13/9/98). The main features arise from magnetic field strengths of about 200 MG (marked with circles) and are not in all cases due to stationary line components. In order to identify the telluric features a spectrum of HD7041 by Stevenson (1994) observed at an airmass 1.7 is shown. |
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Figure 2: Best fit for a magnetic field geometry described by an expansion into spherical harmonics up to l=4 with m=0 (convolved with a 5 Å Gaussian and plotted over the low resolution spectrum, second curve from below), a pure dipole field (lower curve), and a dipole with an offset along the magnetic field axis (second curve from above). For comparison the upper curves show the high resolution spectrum together with the best fit model convolved with a Gaussian of 5 Å. |
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Figure 3: Distribution of the absolute values of the magnetic field strength over the observed hemisphere predicted by the three best fit models: the dipole model (thick line), the off-set dipole model (medium), and expansion into spherical harmonics (thin) up to l=4 (m=0). |
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