Informace o publikaci

On the Nature of Rotation Period Variability of Magnetic Stars

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MIKULÁŠEK Zdeněk KRTIČKA Jiří JANÍK Jan HENRY G. W. ZEJDA Miloslav SHULTZ M. PAUNZEN Ernst JAGELKA Miroslav

Rok publikování 2017
Druh Článek ve sborníku
Konference STARS: FROM COLLAPSE TO COLLAPSE
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Obor Astronomie a nebeská mechanika, astrofyzika
Klíčová slova CU VIRGINIS; BRAKING
Popis The magnetic chemically peculiar (mCP) stars of the upper main sequence exhibit periodic light, magnetic, radio, and spectroscopic variations that can be adequately explained by a model of a rigidly rotating magnetized star with persistent surface structures. The majority of mCP stars rotate at strictly constant periods. However, there are a few mCP stars whose rotation periods vary on timescales of decades while the shape of their phase curves remains unchanged. In the case of CU Vir and V901 Ori, we have detected cyclic period variations. We demonstrate that the period oscillations of CU Vir may be a consequence of the interaction of the internal magnetic field and differential rotation.
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