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Astrophysics and Space Science

, Volume 94, Issue 1, pp 159–163 | Cite as

The magnetic field variation of the Ap star HR 465

  • G. Scholz
Article

Abstract

The magnetic field of HR 465 varies with a period of 23.3 yr. The number and intensity of the absorption lines show their extrema at the times of the cross-over points of the magnetic field in contrast to the phase relation of these quantities known for most short-time magnetic Ap stars. Apart from the variations produced by the binary motion no further general velocity changes were found. The radial velocity determined by lines of the neutral elements differ somewhat significantly from those of the ionized elements. The interpretation causes difficulties in all discussed models; a precession model seems to be a little more favourable than a rigid-rotator or alternating dynamo model.

Keywords

Magnetic Field Radial Velocity Phase Relation Absorption Line General Velocity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Co. 1983

Authors and Affiliations

  • G. Scholz
    • 1
  1. 1.Astrophysikalisches ObservatoriumZentralinstitut für AstrophysikPotsdamG.D.R.

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