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@inproceedings{876037,
author = {Krtička, Jiří and Mikulášek, Zdeněk and Zverko, Juraj and Žižňovský, Jozef and Henry, Gregory and Skalický, Jan and Zvěřina, Pavel},
address = {Cambridge},
booktitle = {Solar and Stellar Variability: Impact on Earth and Planets, IAUS 264},
doi = {http://dx.doi.org/10.1017/S1743921309992754},
keywords = {stars: atmospheres; stars: chemically peculiar; stars: spots; stars: variables: other},
howpublished = {tištěná verze "print"},
language = {eng},
location = {Cambridge},
isbn = {978-0-521-76499-5},
pages = {270-272},
publisher = {Cambridge University Press},
title = {The mechanism of the light variability of chemically peculiar stars},
url = {http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=7277352},
year = {2010}
}
TY - JOUR
ID - 876037
AU - Krtička, Jiří - Mikulášek, Zdeněk - Zverko, Juraj - Žižňovský, Jozef - Henry, Gregory - Skalický, Jan - Zvěřina, Pavel
PY - 2010
TI - The mechanism of the light variability of chemically peculiar stars
PB - Cambridge University Press
CY - Cambridge
SN - 9780521764995
KW - stars: atmospheres
KW - stars: chemically peculiar
KW - stars: spots
KW - stars: variables: other
UR - http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=7277352
N2 - Until recently, the mechanism of the light variability of chemically peculiar (CP) stars was unclear. To improve this situation, we started a theoretical and observational campaign aimed at the nature of the light variability of these stars. We use the TLUSTY model atmospheres calculated for the appropriate surface chemical composition to obtain the emergent flux and to predict the rotationally modulated light curves. We show on example of several well-studied CP stars that their light variations can be explained as a result of i) the uneven surface distribution of the elements (creating overabundant regions), ii) the flux redistribution from the ultraviolet to the visible part of the spectrum (in the overabundant regions), and iii) rotation of the star. We show that the silicon and helium bound-free transitions and iron bound-bound transitions provide the main contribution to the flux redistribution. This result is also a very precise test of modern stellar model atmospheres. We conclude that the mentioned mechanism is a very promising explanation for the light variations in CP stars of earlier spectral types.
ER -
KRTIČKA, Jiří, Zdeněk MIKULÁŠEK, Juraj ZVERKO, Jozef ŽIŽŇOVSKÝ, Gregory HENRY, Jan SKALICKÝ a Pavel ZVĚŘINA. The mechanism of the light variability of chemically peculiar stars. In \textit{Solar and Stellar Variability: Impact on Earth and Planets, IAUS 264}. Cambridge: Cambridge University Press, 2010, s.~270-272. ISBN~978-0-521-76499-5. Dostupné z: https://dx.doi.org/10.1017/S1743921309992754.
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