Model of the Magnetic Field of HD 187474

Details Model of the Magnetic Field of HD 187474 Model of the Magnetic Field of HD 187474

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap.....48..483g&link_type=abstract

Astrophysics, Volume 48, Issue 4, pp.483-490

Astronomy and Astrophysics

Astrophysics

1

Stars: Magnetic Fields, Individual: Hd 187474, Stars: Magnetic Fields - Individual: Hd 187474

Scientific paper

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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