Journal Article

Magnetic stars from a FEROS cool Ap star survey*

V. G. Elkin, D. W. Kurtz and C. Nitschelm

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 420, issue 3, pages 2727-2735
Published in print March 2012 | ISSN: 0035-8711
Published online February 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.20253.x
Magnetic stars from a FEROS cool Ap star survey*

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New magnetic Ap stars with split Zeeman components are presented. These stars were discovered from observations with the Fibre-fed Extended Range Optical Spectrograph (FEROS) spectrograph at the European Southern Observatory (ESO) 2.2-m telescope. 15 new magnetic stars are analysed here. Several stars with very strong magnetic fields were found, including HD 70702 with a 15-kG magnetic field strength, and HD 168767 with a 16.5-kG magnetic field strength measured using split Zeeman components of spectral lines and by comparison with synthetic calculations. The physical parameters of the stars were estimated from photometric and spectroscopic data. Together with previously published results for stars with strong magnetic fields, the relationship between magnetic field strength and rotation period is discussed.

Keywords: techniques: spectroscopic; stars: chemically peculiar; stars: magnetic field; stars: variables: general

Journal Article.  5270 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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