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Model of the Magnetic Field of HD 187474

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Abstract

A model is constructed for the magnetic field of the star HD 187474, which has a very long axial rotation period P = 2345d. It turns out that the structure of the magnetic field is best described by a model of a displaced (Δα = 0.1) dipole inclined to the axis of rotation by an angle β = 24°. The star is inclined to the line of sight by an angle i = 86°. Because of the displaced dipole the magnitude of the magnetic field differs at the poles: Bp = +6300 and 11600 G. A Mercator map of the distribution of the magnetic field over the surface is obtained. The 7 slowly rotating CP stars studied thus far have an average angle β = 62°, which equals the average value for a random orientation of dipoles.

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Authors and Affiliations

  1. Special Astrophysical Observatory, Russian Academy of Sciences, Russia

    Yu. V. Glagolevskij

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  1. Yu. V. Glagolevskij
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__________

Translated from Astrofizika, Vol. 48, No. 4, pp. 575–583 (November 2005).

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Glagolevskij, Y.V. Model of the Magnetic Field of HD 187474. Astrophysics 48, 483–490 (2005). https://doi.org/10.1007/s10511-005-0047-y

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  • DOI: https://doi.org/10.1007/s10511-005-0047-y

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