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Issue A&A
Volume 415, Number 2, February IV 2004
Page(s) 685 - 689
Section Stellar atmospheres
DOI http://dx.doi.org/10.1051/0004-6361:20031486



A&A 415, 685-689 (2004)
DOI: 10.1051/0004-6361:20031486

New measurements of magnetic fields of roAp stars with FORS 1 at the VLT

S. Hubrig1, T. Szeifert1, M. Schöller1, G. Mathys1 and D. W. Kurtz2

1  European Southern Observatory, Casilla 19001, Santiago 19, Chile
2  Centre for Astrophysics, University of Central Lancashire, Preston PR1 2HE, UK

(Received 27 May 2003 / Accepted 18 August 2003)

Abstract
Magnetic fields play a key role in the pulsations of rapidly oscillating Ap (roAp) stars since they are a necessary ingredient of all pulsation excitation mechanisms proposed so far. This implies that the proper understanding of the seismological behaviour of the roAp stars requires knowledge of their magnetic fields. However, the magnetic fields of the roAp stars are not well studied. Here we present new results of measurements of the mean longitudinal field of 14 roAp stars obtained from low resolution spectropolarimetry with FORS 1 at the VLT.


Key words: stars: magnetic field -- stars: oscillations -- stars: chemically peculiar

Offprint request: S. Hubrig, shubrig@eso.org

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