About: Magnetic Chemically Peculiar stars With Unsteady Periods

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	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. 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. (en)
Title	Magnetic Chemically Peculiar stars With Unsteady Periods Magnetic Chemically Peculiar stars With Unsteady Periods (en)
skos:prefLabel	Magnetic Chemically Peculiar stars With Unsteady Periods Magnetic Chemically Peculiar stars With Unsteady Periods (en)
skos:notation	RIV/00216224:14310/11:00049646!RIV12-GA0-14310___
http://linked.open...avai/predkladatel	Přírodovědecká fakulta
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(GA205/06/0217), P(GA205/08/0003), S
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Janík, Jan Zejda, Miloslav Zvěřina, Pavel Mikulášek, Zdeněk Krtička, Jiří
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	210207
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/11:00049646
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	magnetic stars; CP stars; rotation (en)
http://linked.open.../riv/klicoveSlovo	magnetic stars rotation CP stars
http://linked.open...ontrolniKodProRIV	[AB6A3EFAA6CA]
http://linked.open...v/mistoKonaniAkce	Special Astrophysical Observatory of the Russian
http://linked.open...i/riv/mistoVydani	Moskva
http://linked.open...i/riv/nazevZdroje	Magnetic Stars. Proceedings of the International Conference, held in the Special Astrophysical Observatory of the Russian AS
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	New approaches to variable stars data processing and interpretation Mass-loss rate predictions for hot stars
http://linked.open...UplatneniVysledku	2011
http://linked.open...iv/tvurceVysledku	Janík, Jan Mikulášek, Zdeněk Zejda, Miloslav Zvěřina, Pavel Krtička, Jiří Zverko, Juraj Žižnovský, Jozef
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2010-08-31 (xsd:date)
number of pages	9 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Special Astrophysical Observatory of the Russian AS
https://schema.org/isbn	978-5-7422-3156-1
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	Magnetic Chemically Peculiar stars With Unsteady Periods Magnetic Chemically Peculiar stars With Unsteady Periods

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