About: Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105

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Description	Spectral fitting of the spin a = cJ/GM(2) in the microquasar GRS 1915+105 estimate values higher than a = 0.98. However, there are certain doubts about this (nearly) extremal number. Confirming a high value of a > 0.9 would have significant concequences for the theory of high-frequency quasiperiodic oscillations (HF QPOs). Here we discuss its possible implications assuming several commonly used orbital models of 3: 2 HF QPOs. We show that the estimate of a > 0.9 is almost inconsistent with two hot-spot (relativistic precession and tidal disruption) models and the warped disc resonance model. In contrast, we demonstrate that the epicyclic resonance and discoseismic models assuming the c-and g-modes are favoured. We extend our discussion to another two microquasars that display the 3: 2 HF QPOs. The frequencies of these QPOs scale roughly inversely to the microquasar masses, and the differences in the individual spins, such as a = 0.9 compared to a = 0.7, represent a generic problem for most of the discussed geodesic 3:2 QPO models. To explain the observations of all the three microquasars by one unique mechanism, the models would have to accommodate very large non-geodesic corrections. Spectral fitting of the spin a = cJ/GM(2) in the microquasar GRS 1915+105 estimate values higher than a = 0.98. However, there are certain doubts about this (nearly) extremal number. Confirming a high value of a > 0.9 would have significant concequences for the theory of high-frequency quasiperiodic oscillations (HF QPOs). Here we discuss its possible implications assuming several commonly used orbital models of 3: 2 HF QPOs. We show that the estimate of a > 0.9 is almost inconsistent with two hot-spot (relativistic precession and tidal disruption) models and the warped disc resonance model. In contrast, we demonstrate that the epicyclic resonance and discoseismic models assuming the c-and g-modes are favoured. We extend our discussion to another two microquasars that display the 3: 2 HF QPOs. The frequencies of these QPOs scale roughly inversely to the microquasar masses, and the differences in the individual spins, such as a = 0.9 compared to a = 0.7, represent a generic problem for most of the discussed geodesic 3:2 QPO models. To explain the observations of all the three microquasars by one unique mechanism, the models would have to accommodate very large non-geodesic corrections. (en)
Title	Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105 Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105 (en)
skos:prefLabel	Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105 Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105 (en)
skos:notation	RIV/47813059:19240/11:#0004067!RIV12-GA0-19240___
http://linked.open...avai/predkladatel	Filozoficko-přírodovědecká fakulta
http://linked.open...avai/riv/aktivita	P S Z
http://linked.open...avai/riv/aktivity	P(GA202/09/0772), P(LC06014), S, Z(MSM4781305903)
http://linked.open...iv/cisloPeriodika	A59
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Török, Gabriel Stuchlík, Zdeněk Šrámková, Eva Kotrlová, Andrea
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	Slezská univerzita v Opavě / Filozoficko-přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	191676
http://linked.open...ai/riv/idVysledku	RIV/47813059:19240/11:#0004067
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	X-rays: binaries, black hole physics, accretion, accretion disks (en)
http://linked.open.../riv/klicoveSlovo	X-rays: binaries accretion accretion disks black hole physics
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[1D230E1BFACF]
http://linked.open...i/riv/nazevZdroje	ASTRONOMY & ASTROPHYSICS
http://linked.open...in/vavai/riv/obor	BE
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Current problems of gravitation, general relativity and relativistic astrophysics Center for Theoretical Astrophysics
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	531
http://linked.open...iv/tvurceVysledku	Kotrlová, Andrea Stuchlík, Zdeněk Török, Gabriel Šrámková, Eva
http://linked.open...n/vavai/riv/zamer	Relativistic and particle physics and its astrophysical application
issn	0004-6361
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1051/0004-6361/201015549
http://localhost/t...ganizacniJednotka	19240
is http://linked.open...avai/riv/vysledek of	Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105 Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105

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