Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-04-27
Mon.Not.Roy.Astron.Soc. 351 (2004) L34
Astronomy and Astrophysics
Astrophysics
Accepted by MNRAS
Scientific paper
10.1111/j.1365-2966.2004.07946.x
We describe an analysis of the time-resolved measurements of the surface magnetic field in the roAp star gamma Equ. We have obtained a high-resolution and high S/N spectroscopic time-series, and the magnetic field was determined using Zeeman resolved profiles of the Fe II 6149.25 A and Fe I 6173.34 A lines. Contrary to recent reports we do not find any evidence of magnetic variability with pulsation phase, and derive an upper limit of 5-10 G for pulsational modulation of the surface magnetic field in gamma Equ.
Kochukhov Oleg
Landstreet John Darlington
Ryabchikova Tanya
Weiss Walter
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