Secular variability of the longitudinal magnetic field of the Ap star gamma Equ

Details Secular variability of the longitudinal magnetic field of the Ap star gamma Equ Secular variability of the longitudinal magnetic field of the Ap star gamma Equ

2005-10-18

arxiv.org/abs/astro-ph/0510529v1

Mon.Not.Roy.Astron.Soc.365:585-589,2006

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, accepted to MNRAS

Scientific paper

10.1111/j.1365-2966.2005.09738.x

We present an analysis of the secular variability of the longitudinal magnetic field B_e in the roAp star gamma Equ (HD 201601). Measurements of the stellar magnetic field B_e were mostly compiled from the literature, and append also our 33 new B_e measurements which were obtained with the 1-m optical telescope of Special Astrophysical Observatory (Russia). All the available data cover the time period of 58 years, and include both phases of the maximum and minimum B_e. We determined that the period of the long-term magnetic B_e variations equals 91.1 +/- 3.6 years, with B_e (max) = + 577 +/- 31 G and B_e (min) = -1101 +/- 31 G.

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