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Surface Magnetic Field Measurements in Hot Chemically Peculiar Stars

Published online by Cambridge University Press:  19 July 2016

Pierre. Didelon
Pierre. Didelon*
Affiliation:
Strasbourg Observatory, 11, Rue de l'université, 67000 STRASBOURG, FRANCE

Abstract

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The first results of magnetic field measurements are presented here for HD 187474, a slowly rotating Ap star. From resolved Zeeman pattern the strength of the field and its mean inclination were obtained. From differential magnetic broadening a second value of the field strength has been deduced, which is compatible with the previous one. The “Robinson” method has been tested and a good agreement is found between observed and calculated Zeeman broadening of FeII lines. This method can therefore certainly be used to measure the surface field in slow rotating chemically peculiar stars.

Type
V. Magnetic Pieuds
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 313 - 316
Copyright
Copyright © Kluwer 1988 

References

Didelon, P.: 1987, The Messenger n° 49 Google Scholar
Gray, D.F.: 1984, Astrophys. J. 277, 640.Google Scholar
Sun, W.H., Giampapa, M.S. and Worden, S.P.: 1987, Astrophys. J. 312, 930.Google Scholar