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- W110636945 abstract "Abstract. The formerly adopted hypothesis of loss of rotational momentumumin the presence of magnetic elds seems to be contradicted by some recentlyinvestigated magnetic CP stars.Key words: Magnetic stars { models { rotation { long periods 1 The problem of slow rotation of CP stars Considering the statistics of stellar rotational periods there are some diculties to explain the slowrotation of CP stars. Rather probable prove the hypotheses:1. The loss of the rotation momentum took place under the inuence of the magnetic eld justbefore the pre-main sequence-phase of evolution.2. The small rotation momentum was taken from protostellar clouds.The only property of CP stars is in favor of the hypothesis of deceleration | the smaller the massthe greater the di erence between their average velocity vsini and normal stars (Fig. 1). 2 The inuence of the initial rotation on the star formation On the other hand, there is another property | the lower the velocity of CP stars the greatertheir proportions among normal stars (Fig. 2). The latter property supports the hypothesis that thelower the initial rotation velocity of a star when it forms, the greater the probability it will becomea chemically peculiar one. It has turned out that this property is common to chemically peculiarstars | with or without magnetic eld.Glagolevskij and Chuntonov (2003) suggested that the cause of the slow rotation of CP starsshould be searched for at the very initial stages of formation, which is also the reason for divisioninto CP magnetic, CP nonmagnetic and normal stars, because Ae/Be Herbig stars do not possessany magnetic eld of sucient strength." @default.
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- W110636945 date "2007-01-01" @default.
- W110636945 modified "2023-09-27" @default.
- W110636945 title "Model magnetic fields of CP stars with long rotation periods" @default.
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