MIKULÁŠEK, Zdeněk, Jiří KRTIČKA, Jan JANÍK, Pavel ZVĚŘINA, Juraj ZVERKO, Jozef ŽIŽNOVSKÝ and Miloslav ZEJDA. Magnetic Chemically Peculiar stars With Unsteady Periods. In I. I. Romanyuk, D. O. Kudryavtsev. 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, 2011, p. 52-60. ISBN 978-5-7422-3156-1.
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Basic information
Original name Magnetic Chemically Peculiar stars With Unsteady Periods
Name in Czech Magnetické chemicky pekuliární hvězdy s nestabilními periodami.
Authors MIKULÁŠEK, Zdeněk (203 Czech Republic, guarantor, belonging to the institution), Jiří KRTIČKA (203 Czech Republic, belonging to the institution), Jan JANÍK (203 Czech Republic, belonging to the institution), Pavel ZVĚŘINA (203 Czech Republic, belonging to the institution), Juraj ZVERKO (703 Slovakia), Jozef ŽIŽNOVSKÝ (703 Slovakia) and Miloslav ZEJDA (203 Czech Republic, belonging to the institution).
Edition Moskva, Magnetic Stars. Proceedings of the International Conference, held in the Special Astrophysical Observatory of the Russian AS, p. 52-60, 9 pp. 2011.
Publisher Special Astrophysical Observatory of the Russian AS
Other information
Original language English
Type of outcome Proceedings paper
Field of Study 10308 Astronomy
Country of publisher Russian Federation
Confidentiality degree is not subject to a state or trade secret
Publication form printed version "print"
RIV identification code RIV/00216224:14310/11:00049646
Organization unit Faculty of Science
ISBN 978-5-7422-3156-1
Keywords (in Czech) magnetické hvězdy; CP hvězdy; rotace
Keywords in English magnetic stars; CP stars; rotation
Tags AKR, rivok
Tags International impact
Changed by Changed by: RNDr. Jan Janík, Ph.D., učo 17241. Changed: 28/1/2013 10:02.
Abstract
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.
Links
GA205/06/0217, research and development projectName: Nové postupy ve zpracování a interpretaci pozorování proměnných hvězd
Investor: Czech Science Foundation, New approaches to variable stars data processing and interpretation
GA205/08/0003, research and development projectName: Předpovědi rychlosti ztráty hmoty horkých hvězd
Investor: Czech Science Foundation, Mass-loss rate predictions for hot stars
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