Long-Term Variability in the Magnetic Field of the Ap Star γ Equстатья
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Дата последнего поиска статьи во внешних источниках: 16 января 2019 г.
Аннотация:New measurements of the longitudinal magnetic field of the Ap star γ Equ obtained with the MSS
spectrograph of the 6-m telescope of the SAO RAS in 2002–2018 are present. Analyzing our results
together with all the available literature data sources of [Bz] (441 measurements) we found the rotation period P = 89.1 ± 4.2 years (32 521 days). Fitting all the measurements with double sine-wave function resulted in two periods equal to 95.5 and 17.4 years (with the errors of 3.5 and 2 years correspondingly). According to our new estimate, the transition to positive values of [Bz], probably, will occur later than previously assumed, literally in 2031.