Detailed Information on Publication Record
2012
Confronting the models of 3 : 2 QPOs with the evidence of near extreme kerr black hole (Conference Paper)
KOTRLOVÁ, Andrea, Zdeněk STUCHLÍK, Eva ŠRÁMKOVÁ and Gabriel TÖRÖKBasic information
Original name
Confronting the models of 3 : 2 QPOs with the evidence of near extreme kerr black hole (Conference Paper)
Authors
Edition
Cambridge, UK, Proceedings of the International Astronomical Union, p. 239-240, 2 pp. 2012
Publisher
Cambridge University Press
Other information
Language
English
Type of outcome
Stať ve sborníku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Philosophy and Science in Opava
ISBN
978-1-107-03379-5
ISSN
Keywords in English
Accretion; Accretion disks; Black hole physics; X-rays: binaries
Tags
International impact
Links
GPP209/12/P740, research and development project.
Změněno: 7/12/2020 14:42, Mgr. Pavlína Jalůvková
Abstract
V originále
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