Based on observations collected at the European Southern Observatory, La Silla, Chile, as part of programmes 078.D-0080(A), 080.D- 0191(A), 081.D-2002(A), 082.D-0061(A), 083.D-0034(A) and 084.D-0067(A).
Magnetic stars from a FEROS cool Ap star survey★
Article first published online: 18 JAN 2012
© 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Monthly Notices of the Royal Astronomical Society
Volume 420, Issue 3, pages 2727–2735, March 2012
How to Cite
Elkin, V. G., Kurtz, D. W. and Nitschelm, C. (2012), Magnetic stars from a FEROS cool Ap star survey. Monthly Notices of the Royal Astronomical Society, 420: 2727–2735. doi: 10.1111/j.1365-2966.2011.20253.x
- Issue published online: 16 FEB 2012
- Article first published online: 18 JAN 2012
- Accepted 2011 November 24. Received 2011 November 23; in original form 2011 October 28
- techniques: spectroscopic;
- stars: chemically peculiar;
- stars: magnetic field;
- stars: variables: general
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.