New measurements of magnetic fields of roAp stars with FORS1 at the VLT

Details New measurements of magnetic fields of roAp stars with FORS1 at the VLT New measurements of magnetic fields of roAp stars with FORS1 at the VLT

2003-09-21

arxiv.org/abs/astro-ph/0309560v1

Astron.Astrophys.415:685-689,2004

Astronomy and Astrophysics

Astrophysics

5 pages, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20031486

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 FORS1 at the VLT.

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