Volume 402, Number 2, May I 2003
|Page(s)||729 - 731|
|Section||Stellar structure and evolution|
|Published online||14 April 2003|
Magnetic field measurements of Ap stars
Discovery of a strong magnetic field in HD 18610
Institute for Astronomy (IfA), University of Vienna, Türkenschanzstrasse 17, 1180 Wien, Austria
2 Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya 48, 109017 Moscow, Russia
Corresponding author: Ch. Stütz, firstname.lastname@example.org
Accepted: 12 February 2003
HD 18610 was included in our project on abundance determination of rapidly oscillating (roAp) and non–oscillating (noAp) cool chemically peculiar stars. Already a preliminary investigation of the raw spectra indicated the presence of an intense magnetic field which was confirmed by a more detailed analysis. To determine the magnetic field strength we primarily used the Fe ii line at 6149.26 Å, a strong line which is split in a anomalous Zeeman doublet. HD 18610 is a Cr–Eu–Sr non-pulsating Ap star with a Teff and typical for roAp stars. The classification of this star as a CP2 star (Preston [CITE]) was confirmed with Δa photometry by Maitzen & Vogt ([CITE]). In the present investigation we derived a mean magnetic field modulus of G.
Key words: stars: individual: HD 18610 / stars: magnetic fields / stars: chemically peculiar
© ESO, 2003
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