Confronting the Models of 3:2 QPOs with the Evidence of Near Extreme Kerr Black Hole
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Confronting the Models of 3:2 QPOs with the Evidence of Near Extreme Kerr Black Hole
Original language description
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
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GPP209%2F12%2FP740" target="_blank" >GPP209/12/P740: High frequency quasi-periodic oscillations and compact object properties: theory vs. observation</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
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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Number of pages
2
Pages from-to
239-240
Publisher name
Cambridge University Press
Place of publication
Cambridge, UK
Event location
Beijing, China
Event date
Aug 20, 2012
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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