About: Distribution of Kilohertz QPO Frequencies and Their Ratios in the Atoll Source 4U 1636-53

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A recently published study on long term evolution of the frequencies of the kilohertz quasi-periodic oscillations (QPOs) in the atoll source 4U 1636-53 concluded that there is no preferred frequency ratio in a distribution of twin QPOs that was inferred from the distribution of a single frequency alone. However, we find that the distribution of the ratio of actually observed pairs of kHz QPO frequencies is peaked close to the 3/2 value, and possibly also close to the 5/4 ratio. To resolve the apparent contradiction between the two studies, we examine in detail the frequency distributions of the lower kHz QPO and the upper kHz QPO detected in our data set. A recently published study on long term evolution of the frequencies of the kilohertz quasi-periodic oscillations (QPOs) in the atoll source 4U 1636-53 concluded that there is no preferred frequency ratio in a distribution of twin QPOs that was inferred from the distribution of a single frequency alone. However, we find that the distribution of the ratio of actually observed pairs of kHz QPO frequencies is peaked close to the 3/2 value, and possibly also close to the 5/4 ratio. To resolve the apparent contradiction between the two studies, we examine in detail the frequency distributions of the lower kHz QPO and the upper kHz QPO detected in our data set. (en) Ukazujeme, že rozložení poměrů frekvencí párů QPO upřednostňuje poměr 3/2 a možná i 5/4. Vzhledem k protikladným tvrzením ve dvou nedávno publikovaných článcích, provádíme detailní rozbor rozložení párů ve frekvenčním prostoru. (cs)
Title	Distribution of Kilohertz QPO Frequencies and Their Ratios in the Atoll Source 4U 1636-53 Distribution of Kilohertz QPO Frequencies and Their Ratios in the Atoll Source 4U 1636-53 (en) Rozložení poměrů frekvencí QPO ve zdroji 4U 1636-53 (cs)
skos:prefLabel	Distribution of Kilohertz QPO Frequencies and Their Ratios in the Atoll Source 4U 1636-53 Distribution of Kilohertz QPO Frequencies and Their Ratios in the Atoll Source 4U 1636-53 (en) Rozložení poměrů frekvencí QPO ve zdroji 4U 1636-53 (cs)
skos:notation	RIV/67985815:_____/08:00313326!RIV09-AV0-67985815
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(LC06014), Z(AV0Z10030501), Z(MSM4781305903)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2009
http://linked.open...aciTvurceVysledku	Bursa, Michal Horák, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	363905
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/08:00313326
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	X-rays; binaries stars; accretion disks (en)
http://linked.open.../riv/klicoveSlovo	accretion disks binaries stars X-rays
http://linked.open...odStatuVydavatele	PL - Polská republika
http://linked.open...ontrolniKodProRIV	[0004EE197EEA]
http://linked.open...i/riv/nazevZdroje	Acta Astronomica
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Center for Theoretical Astrophysics
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	58
http://linked.open...iv/tvurceVysledku	Horák, Jiří Abramowicz, M. A. Bursa, Michal Kluzniak, W. Stuchlík, Z. Rebusco, P. Bakala, P. Török, G.
http://linked.open...ain/vavai/riv/wos	255383600002
http://linked.open...n/vavai/riv/zamer	Astronomie a astrofyzika Relativistic and particle physics and its astrophysical application
issn	0001-5237
number of pages	7 (xsd:int)

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