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• W2129351625 abstract "We used the new magnetic Doppler Imaging code to reconstruct the magnetic eld geometry and surface abundance distributions for the classical magnetic CP star 2 CVn. High-resolution spectropolarimetric observations in the Stokes I and V parameters were collected with the SOFIN echelle spectrograph at the Nordic Optical Telescope. This superb observational material in combination with the advanced modelling technique allowed to achieve the rst simultaneous self-consistent mapping of the vector magnetic eld and the abundance distributions of six chemical elements. In recovering the stellar magnetic distribution no prior assumptions about the eld geometry or strength were made. Instead, we restricted possible solutions of the inverse problem by means of the multipolar regularization method which searches for the eld map close to a general non-axisymmetric multipolar conguration but allows departures from this geometry if that is required by the observational data. We found that the magnetic eld of 2 CVn is dominated by a dipolar component and has a minor quadrupole contribution. The surface distributions of the chemical species form symmetric patterns which closely follow the magnetic geometry. This discovery constitutes one of the rst direct observational constraints on the horizontal diusion processes acting in the upper envelope of a strongly magnetized stellar atmosphere. In addition to the extensive magnetic Doppler Imaging analysis, we derived new accurate estimates of the atmospheric parameters and basic physical properties of 2 CVn using the energy distribution, hydrogen line proles and the recent" @default.
• W2129351625 created "2016-06-24" @default.
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• W2129351625 date "2002-06-27" @default.
• W2129351625 modified "2023-09-27" @default.
• W2129351625 title "Doppler Imaging of stellar magnetic fields" @default.
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• W2129351625 doi "https://doi.org/10.1051/0004-6361:20020299" @default.
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