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  • Diskutujeme možnost, že vysokofrekvenční QPO v binárních systémech s neutronovou hvězdou mohou mít původ ve vynucených rezonančních oscilacích hmoty v nejvnitřnějších částech akrečního disku excitovaných gravitačními perturbacemi vznikajícími z asymetrií neutronové hvězdy nebo z binárního partnera. Ukazujeme, že asymetrie neutronové hvězdy v principu mohou mít vliv na indukci jak radiálních, tak vertikálních oscilací relevantní amplitudy, zatímco binární partner by snad mohl produkovat signifikantní radiální oscilace, avšak nikoliv vertikální. Vyosené kvadrupolové momenty neutronové hvězdy o velikosti, která je běžně používána pro vysvětlení limitních period neutronových hvězd, mohou být dostatečné také pro efekt popisovaný v tomto článku. (cs)
  • We discuss the possibility that high-frequency QPOs in neutron-star binary systems may result from forced resonant oscillations of matter in the innermost parts of the accretion disc, excited by gravitational perturbations coming from asymmetries of the neutron star or from the companion star. We find that neutron-star asymmetries could, in principle, be effective for inducing both radial and vertical oscillations of relevant amplitude while the binary companion might possibly produce significant radial oscillations but not vertical ones. Misaligned neutron-star quadrupole moments of a size advocated elsewhere for explaining limiting neutron star periods could be large enough also for the present purpose.
  • We discuss the possibility that high-frequency QPOs in neutron-star binary systems may result from forced resonant oscillations of matter in the innermost parts of the accretion disc, excited by gravitational perturbations coming from asymmetries of the neutron star or from the companion star. We find that neutron-star asymmetries could, in principle, be effective for inducing both radial and vertical oscillations of relevant amplitude while the binary companion might possibly produce significant radial oscillations but not vertical ones. Misaligned neutron-star quadrupole moments of a size advocated elsewhere for explaining limiting neutron star periods could be large enough also for the present purpose. (en)
Title
  • Gravitational excitation of high frequency QPOs
  • Gravitational excitation of high frequency QPOs (en)
  • Gravitační excitace vysokofrekvenčních QPO (cs)
skos:prefLabel
  • Gravitational excitation of high frequency QPOs
  • Gravitational excitation of high frequency QPOs (en)
  • Gravitační excitace vysokofrekvenčních QPO (cs)
skos:notation
  • RIV/47813059:19240/08:#0002228!RIV09-GA0-19240___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA202/06/0041), Z(MSM4781305903)
http://linked.open...iv/cisloPeriodika
  • 3
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 369621
http://linked.open...ai/riv/idVysledku
  • RIV/47813059:19240/08:#0002228
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • neutron stars, binary systems, QPOs, accretion discs (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • FR - Francouzská republika
http://linked.open...ontrolniKodProRIV
  • [EC78B58CE11F]
http://linked.open...i/riv/nazevZdroje
  • Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 489
http://linked.open...iv/tvurceVysledku
  • Stuchlík, Zdeněk
  • Hledík, Stanislav
http://linked.open...ain/vavai/riv/wos
  • 000259760200010
http://linked.open...n/vavai/riv/zamer
issn
  • 0004-6361
number of pages
http://localhost/t...ganizacniJednotka
  • 19240
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