Confronting the models of 3 : 2 QPOs with the evidence of near extreme kerr black hole (Conference Paper)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F12%3A%230004572" target="_blank" >RIV/47813059:19240/12:#0004572 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1017/S1743921312019801" target="_blank" >http://dx.doi.org/10.1017/S1743921312019801</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/S1743921312019801" target="_blank" >10.1017/S1743921312019801</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Confronting the models of 3 : 2 QPOs with the evidence of near extreme kerr black hole (Conference Paper)

Popis výsledku v původním jazyce

The black hole mass and spin estimates assuming various specific models of the 3 : 2 high frequency quasi-periodic oscillations (HF QPOs) have been carried out in Török et al. (2005, 2011). Here we briefly summarize some current points. Spectral fittingof the spin a = cJ/GM 2 in the microquasar GRS 1915 + 105 reveals that this system can contain a near extreme rotating black hole (e.g., McClintock et al., 2011). Confirming the high value of the spin would have significant consequences for the theory ofthe HF QPOs. The estimate of a > 0.9 is almost inconsistent with the relativistic precession (RP), tidal disruption (TD), and the warped disc (WD) model. The epicyclic resonance (Ep) and discoseismic models assuming the c- and g- modes are instead favoured. However, consideration of all three microquasars that display the 3 : 2 HF QPOs leads to a serious puzzle because the differences in the individual spins, such as a = 0.9 compared to a = 0.7, represent a generic problem almost for an

Název v anglickém jazyce

Confronting the models of 3 : 2 QPOs with the evidence of near extreme kerr black hole (Conference Paper)

Popis výsledku anglicky

The black hole mass and spin estimates assuming various specific models of the 3 : 2 high frequency quasi-periodic oscillations (HF QPOs) have been carried out in Török et al. (2005, 2011). Here we briefly summarize some current points. Spectral fittingof the spin a = cJ/GM 2 in the microquasar GRS 1915 + 105 reveals that this system can contain a near extreme rotating black hole (e.g., McClintock et al., 2011). Confirming the high value of the spin would have significant consequences for the theory ofthe HF QPOs. The estimate of a > 0.9 is almost inconsistent with the relativistic precession (RP), tidal disruption (TD), and the warped disc (WD) model. The epicyclic resonance (Ep) and discoseismic models assuming the c- and g- modes are instead favoured. However, consideration of all three microquasars that display the 3 : 2 HF QPOs leads to a serious puzzle because the differences in the individual spins, such as a = 0.9 compared to a = 0.7, represent a generic problem almost for an

Druh

D - Stať ve sborníku

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GPP209%2F12%2FP740" target="_blank" >GPP209/12/P740: Vysokofrekvenční kvazi-periodické oscilace a vlastnosti kompaktních objektů: teorie vs. pozorování</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the International Astronomical Union

ISBN

978-1-107-03379-5

ISSN

1743-9213

e-ISSN

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Počet stran výsledku

2

Strana od-do

239-240

Název nakladatele

Cambridge University Press

Místo vydání

Cambridge, UK

Místo konání akce

Peking, Čína

Datum konání akce

20. 8. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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