Confronting the Models of 3:2 QPOs with the Evidence of Near Extreme Kerr Black Hole

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19240%2F13%3A%230004627" target="_blank" >RIV/47813059:19240/13:#0004627 - isvavai.cz</a>

Výsledek na webu

<a href="http://journals.cambridge.org/article_S1743921312019801" target="_blank" >http://journals.cambridge.org/article_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

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 T¨or¨ok et al. (2005, 2011). Here we briefly summarize some current points. Spectral fitting of the spin a=cJ/GM2 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 of the 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 any u

Název v anglickém jazyce

Confronting the Models of 3:2 QPOs with the Evidence of Near Extreme Kerr Black Hole

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 T¨or¨ok et al. (2005, 2011). Here we briefly summarize some current points. Spectral fitting of the spin a=cJ/GM2 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 of the 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 any u

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)

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, Symposium No. 290: Feeding compact objects: Accretion on all scales

ISBN

978-1-107-03379-5

ISSN

1743-9221

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

Beijing, China

Datum konání akce

20. 8. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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