| Issue |
A&A
Volume 402, Number 2, May I 2003
|
|
|---|---|---|
| Page(s) | 729 - 731 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20030283 | |
| Published online | 14 April 2003 | |
Magnetic field measurements of Ap stars
Discovery of a strong magnetic field in HD 18610
1
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, stuetz@tycho.astro.univie.ac.at
Received:
5
July
2002
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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