About: On the Origin of Clustering of Frequency 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 long discussion has been devoted to the issue of clustering of the kHz quasi periodic oscillation (QPO) frequency ratios in the neutron star sources. While the distribution of ratios inferred from an occurrence of a single QPO seems to be consistent with a random walk, the distribution based on simultaneous detections of both peaks indicates a preference of ratios of small integers. Based on the public RXTE data we further investigate this issue for the source 4U1636-53. Quality factors and rms amplitudes of both the QPOs nearly equal at the points where the frequencies are commensurable, and where the twin QPO detections cluster. We discuss a connection of the clustering with the varying properties of the two QPO modes. A long discussion has been devoted to the issue of clustering of the kHz quasi periodic oscillation (QPO) frequency ratios in the neutron star sources. While the distribution of ratios inferred from an occurrence of a single QPO seems to be consistent with a random walk, the distribution based on simultaneous detections of both peaks indicates a preference of ratios of small integers. Based on the public RXTE data we further investigate this issue for the source 4U1636-53. Quality factors and rms amplitudes of both the QPOs nearly equal at the points where the frequencies are commensurable, and where the twin QPO detections cluster. We discuss a connection of the clustering with the varying properties of the two QPO modes. (en) Za použití pozorování zdroje 4U 1636-53 zkoumáme rozložení poměrů frekvencí kHz QPO. Zdá se, že v místech, kde se seskupují poměry frekvencí pozorovaných párů QPO, dochází i k přechodu v dalších charakteristikách, jako je koherence a amplituda oscilace. (cs)
Title	On the Origin of Clustering of Frequency Ratios in the Atoll Source 4U 1636-53 O původu seskupování poměrů frekvencí ve zdroji 4U 1636-53 (cs) On the Origin of Clustering of Frequency Ratios in the Atoll Source 4U 1636-53 (en)
skos:prefLabel	On the Origin of Clustering of Frequency Ratios in the Atoll Source 4U 1636-53 O původu seskupování poměrů frekvencí ve zdroji 4U 1636-53 (cs) On the Origin of Clustering of Frequency Ratios in the Atoll Source 4U 1636-53 (en)
skos:notation	RIV/67985815:_____/08:00313320!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	2
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	384776
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/08:00313320
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	[49EE668D2F15]
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	7 (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 Stuchlík, Z. Rebusco, P. Bakala, P. Török, G.
http://linked.open...ain/vavai/riv/wos	258131600004
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)
is http://linked.open...avai/riv/vysledek of	On the Origin of Clustering of Frequency Ratios in the Atoll Source 4U 1636-53 On the Origin of Clustering of Frequency Ratios in the Atoll Source 4U 1636-53

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