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Magnetic fields of chemically peculiar stars

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Astrophysics Aims and scope

Models of the magnetic fields of 60 chemically peculiar (CP) stars are examined. The modelling technique assumes an internal structure of the magnetic field similar to a theoretical magnetic dipole. The magnetic field structures of most of the stars are not symmetric with respect to the center of the star. It is assumed that, from the standpoint of a relict mechanism, the observed field configurations are residues of complex protostellar structures that approach a simple dipole geometry with the passage of time because of instabilities. Difficulties with the hypothesis of toroidal-poloidal internal structures of the magnetic fields of CP stars are discussed. It is shown for the example of the star HD 21699 that the distribution of chemical anomalies is closely related to the magnetic field distribution. It is confirmed that the chemical anomalies are caused by the diffusion of chemical elements in a stable atmosphere under the action of gravity, radiation pressure, and wind.

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Authors and Affiliations

  1. Special Astrophysical Observatory (SAO), Russian Academy of Sciences, Nizhnij Arkhyz, Russia

    Yu. V. Glagolevskij

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Correspondence to Yu. V. Glagolevskij.

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Translated from Astrofizika, Vol. 55, No. 3, pp. 369-388 (August 2012).

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Glagolevskij, Y.V. Magnetic fields of chemically peculiar stars. Astrophysics 55, 334–350 (2012). https://doi.org/10.1007/s10511-012-9240-y

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