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@inproceedings{902624,
author = {Mikulášek, Zdeněk and Krtička, Jiří and Janík, Jan and Zvěřina, Pavel and Zverko, Juraj and Žižnovský, Jozef and Zejda, Miloslav},
address = {Moskva},
booktitle = {Magnetic Stars. Proceedings of the International Conference, held in the Special Astrophysical Observatory of the Russian AS},
editor = {I. I. Romanyuk, D. O. Kudryavtsev},
keywords = {magnetic stars; CP stars; rotation},
howpublished = {tištěná verze "print"},
language = {eng},
location = {Moskva},
isbn = {978-5-7422-3156-1},
pages = {52-60},
publisher = {Special Astrophysical Observatory of the Russian AS},
title = {Magnetic Chemically Peculiar stars With Unsteady Periods},
year = {2011}
}
TY - JOUR
ID - 902624
AU - Mikulášek, Zdeněk - Krtička, Jiří - Janík, Jan - Zvěřina, Pavel - Zverko, Juraj - Žižnovský, Jozef - Zejda, Miloslav
PY - 2011
TI - Magnetic Chemically Peculiar stars With Unsteady Periods
PB - Special Astrophysical Observatory of the Russian AS
CY - Moskva
SN - 9785742231561
KW - magnetic stars
KW - CP stars
KW - rotation
N2 - Photometrically and spectroscopically variable chemically peculiar (CP) stars are the optimum laboratories for testing the rotational evolution of main sequence stars. A vast majority of well-studied CP stars have quite steady rotational periods (e. g. SrCrEu star CQ UMa). However, there are several CP stars that exhibit apparent period variations. The origin of the period variations is unclear in many cases. We describe the observed period variations of several individual CP stars, especially V901 Ori, sigma Ori E, HR 7355, CU Vir, SX Ari, and EE Dra. The CP stars with unsteady periods now represent a very diverse group with dissimilar O-C diagrams and time scales. We also discuss the causes of the period changes found and a possible cyclicity or chaoticity of them.
ER -
MIKULÁŠEK, Zdeněk, Jiří KRTIČKA, Jan JANÍK, Pavel ZVĚŘINA, Juraj ZVERKO, Jozef ŽIŽNOVSKÝ a Miloslav ZEJDA. Magnetic Chemically Peculiar stars With Unsteady Periods. In I. I. Romanyuk, D. O. Kudryavtsev. \textit{Magnetic Stars. Proceedings of the International Conference, held in the Special Astrophysical Observatory of the Russian AS}. Moskva: Special Astrophysical Observatory of the Russian AS. s.~52-60. ISBN~978-5-7422-3156-1. 2011.
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