Open AccessSecular variability of the longitudinal magnetic field of the Ap star γ Equ
Author(s) -
Bychkov V. D.,
Bychkova L. V.,
Madej J.
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09738.x
Subject(s) - physics , astrophysics , secular variation , observatory , cover (algebra) , magnetic field , astronomy , stars , telescope , star (game theory) , field (mathematics) , mechanical engineering , mathematics , quantum mechanics , pure mathematics , engineering
We present an analysis of the secular variability of the longitudinal magnetic field B e in the roAp star γ Equ (HD 201601). Measurements of the stellar magnetic field B e were mostly compiled from the literature, and we appended also our 33 new B e measurements which were obtained with the 1‐m optical telescope of the Special Astrophysical Observatory (Russia). All the available data cover the time period of 58 yr, 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 yr , with B e (max) =+577 ± 31 G and B e (min) =−1101 ± 31 G .