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

@inproceedings{42721,
   author = {Kotrlová, Andrea and Stuchlík, Zdeněk and Šrámková, Eva and Török, Gabriel},
   address = {Cambridge, UK},
   booktitle = {Proceedings of the International Astronomical Union, Symposium No. 290: Feeding compact objects: Accretion on all scales},
   doi = {http://dx.doi.org/10.1017/S1743921312019801},
   keywords = {accretion; accretion disks; X-rays: binaries; black hole physics},
   language = {eng},
   location = {Cambridge, UK},
   isbn = {978-1-107-03379-5},
   pages = {239-240},
   publisher = {Cambridge University Press},
   title = {Confronting the Models of 3:2 QPOs with the Evidence of Near Extreme Kerr Black Hole},
   url = {http://journals.cambridge.org/article_S1743921312019801},
   year = {2013}
}

TY  - JOUR
ID  - 42721
AU  - Kotrlová, Andrea - Stuchlík, Zdeněk - Šrámková, Eva - Török, Gabriel
PY  - 2013
TI  - Confronting the Models of 3:2 QPOs with the Evidence of Near Extreme Kerr Black Hole
PB  - Cambridge University Press
CY  - Cambridge, UK
SN  - 9781107033795
KW  - accretion
KW  - accretion disks
KW  - X-rays: binaries
KW  - black hole physics
UR  - http://journals.cambridge.org/article_S1743921312019801
N2  - 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
ER  - 

KOTRLOVÁ, Andrea, Zdeněk STUCHLÍK, Eva ŠRÁMKOVÁ and Gabriel TÖRÖK. Confronting the Models of 3:2 QPOs with the Evidence of Near Extreme Kerr Black Hole. In \textit{Proceedings of the International Astronomical Union, Symposium No. 290: Feeding compact objects: Accretion on all scales}. Cambridge, UK: Cambridge University Press, 2013, p.~239-240. ISBN~978-1-107-03379-5. Available from: https://dx.doi.org/10.1017/S1743921312019801.