... SHTOL ' Special Astrophysical Observatory of the Russian AS, Nizhnij Arkhyz 357147, Russia The investigation of such a phenomenon as the magnetic field variability at long times (years - decennials) is very interesting. If the explanation of the magnetic field variability with rotation period by the oblique rotator model is evident, then the reason of the long-period variability is not clear yet, despite the existence of some assumptions on its nature. ... Fig.2. ... 213 Fig.3. ...

Magnetic Stars, 2011, pp. ... 2008). ... The origin of magnetic fields of hot massive stars is explained by the fossil field theory, MAGNETISM OF STARS 451 1-5 Be measurements -> 1278 stars 100 N stars 6-10 Be measurements -> 80 stars 50 11-15 Be measurements -> 47 stars 0 20 40 60 80 100 120 140 160 180 The namber of individual measurements The number of individual measurements Figure 1: The number of stars in a single bin versus the number of individual Be determinations for a single star. ...