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  • It is highly probable that a non-linear resonance between some modes of oscillations in the accretion discs around black holes and neutron stars can play a crucial role in exciting detectable modulations of the X-ray flux.Detailed studies of the resonance models revealed that several of such non-linear resonances are possible in nearly Keplerian discs in stron gravity. Moreover, this idea seems to be strongly supported by observations~-- in all four microquasars showing twin peak QPOs (quasiperiodic oscillations), the ratio of frequency peaks is $3\!:\!2$. In principle, using known frequencies of the twin peaks and the known mass of the central black hole, the \emph{black-hole spin can be determined}.
  • It is highly probable that a non-linear resonance between some modes of oscillations in the accretion discs around black holes and neutron stars can play a crucial role in exciting detectable modulations of the X-ray flux.Detailed studies of the resonance models revealed that several of such non-linear resonances are possible in nearly Keplerian discs in stron gravity. Moreover, this idea seems to be strongly supported by observations~-- in all four microquasars showing twin peak QPOs (quasiperiodic oscillations), the ratio of frequency peaks is $3\!:\!2$. In principle, using known frequencies of the twin peaks and the known mass of the central black hole, the \emph{black-hole spin can be determined}. (en)
  • Je vysoce pravděpodobné, že nelineární rezonance mezi některými módy oscilací v akrečních discích kolem černých děr a neutronových hvězd mohou hrát klíčovou roli v excitaci detekovatelných modulací rentgenového toku. Podrobné studie rezonančních modelů odhalily, že několik takových nelineárních rezonancí může nastat v téměř keplerovských discích v případě silné gravitace. Navíc se zdá, že tato idea má silnou observační podporu - ve všech čtyřech mikrokvasarech vykazující kvaziperiodické oscilace s dvojitým píkem je poměr frekvencí píku 3:2. Jsouli známy frekvence dvojitého píku a hmotnost centrální černé díry, lze v principu určit spin černé díry. (cs)
Title
  • On the possibility of precise determination of black hole spin in the framework of resonance models
  • O možnosti přesného určení spinu černé díry v rámci rezonančních modelů (cs)
  • On the possibility of precise determination of black hole spin in the framework of resonance models (en)
skos:prefLabel
  • On the possibility of precise determination of black hole spin in the framework of resonance models
  • O možnosti přesného určení spinu černé díry v rámci rezonančních modelů (cs)
  • On the possibility of precise determination of black hole spin in the framework of resonance models (en)
skos:notation
  • RIV/47813059:19240/05:#0000783!RIV08-MSM-19240___
http://linked.open.../vavai/riv/strany
  • 253-263
http://linked.open...avai/riv/aktivita
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  • Z(MSM4781305903)
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  • 534497
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  • RIV/47813059:19240/05:#0000783
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  • compact objects, X-ray variability, theory, observations (en)
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  • [4116C9F62DEF]
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  • Opava
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  • Opava
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  • Proceedings of RAGtime 6/7: Workshops on black holes and neutron stars
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
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  • Stuchlík, Zdeněk
  • Török, Gabriel
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http://linked.open...n/vavai/riv/zamer
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  • Slezská univerzita v Opavě. Filozoficko-přírodovědecká fakulta. Ústav fyziky
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  • 80-7248-334-X
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  • 19240
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