Informace o publikaci

The nature of light variations in magnetic hot stars

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KRTIČKA Jiří HUANG L. JAGELKA Miroslav LUFTINGER T. MIKULÁŠEK Zdeněk NIEMCZURA E. PRVÁK Milan SILVESTER J. WADE G.

Rok publikování 2018
Druh Článek v odborném periodiku
Časopis / Zdroj Contributions of the Astronomical Observatory Skalnaté Pleso
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www http://adsabs.harvard.edu/abs/2018CoSka..48..170K
Klíčová slova stars: chemically peculiar; stars: early type; stars: variables; stars: winds outflows; stars: mass-loss
Popis Magnetic stars show several types of light variability which is modulated by the stellar rotation. In chemically peculiar stars, the redistribution of the flux in the surface regions with peculiar chemical composition leads to the light variability with a typical amplitude of the order of hundredths of magnitude. The most efficient processes that cause the flux redistribution are bound-bound (line) transitions of iron and bound-free (ionization) transitions of silicon. This type of light variability typically leads to a complex dependence of the amplitude on the wavelength and shows antiphase light curves in the far ultraviolet and visual regions. In hot magnetic stars, the modulation of the stellar wind by the magnetic field and the wind blanketing cause the light variability with a typical amplitude of the order of millimagnitudes. We predict the light variations in selected magnetic hot stars and compare the simulated light curves with light variations derived from observations.
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