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@article{42112,
author = {Kotrlová, Andrea and Stuchlík, Zdeněk and Šrámková, Eva and Török, Gabriel},
article_location = {FR - Francouzská republika},
article_number = {A59},
doi = {http://dx.doi.org/10.1051/0004-6361/201015549},
keywords = {X-rays: binaries, black hole physics, accretion, accretion disks},
language = {eng},
issn = {0004-6361},
journal = {Astronomy & Astrophysics},
title = {Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105},
volume = {531},
year = {2011}
}
TY - JOUR
ID - 42112
AU - Kotrlová, Andrea - Stuchlík, Zdeněk - Šrámková, Eva - Török, Gabriel
PY - 2011
TI - Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105
JF - Astronomy & Astrophysics
VL - 531
IS - A59
SN - 00046361
KW - X-rays: binaries, black hole physics, accretion, accretion disks
N2 - Spectral fitting of the spin a = cJ/GM(2) in the microquasar GRS 1915+105 estimate values higher than a = 0.98. However, there are certain doubts about this (nearly) extremal number. Confirming a high value of a > 0.9 would have significant concequencesfor the theory of high-frequency quasiperiodic oscillations (HF QPOs). Here we discuss its possible implications assuming several commonly used orbital models of 3: 2 HF QPOs. We show that the estimate of a > 0.9 is almost inconsistent with two hot-spot(relativistic precession and tidal disruption) models and the warped disc resonance model. In contrast, we demonstrate that the epicyclic resonance and discoseismic models assuming the c-and g-modes are favoured. We extend our discussion to another two microquasars that display the 3: 2 HF QPOs. The frequencies of these QPOs scale roughly inversely to the microquasar masses, and the differences in the individual spins, such as a = 0.9 compared to a = 0.7, represent a generic problem for
ER -
KOTRLOVÁ, Andrea, Zdeněk STUCHLÍK, Eva ŠRÁMKOVÁ and Gabriel TÖRÖK. Confronting the models of 3:2 quasiperiodic oscillations with the rapid spin of the microquasar GRS 1915+105. \textit{Astronomy \&{} Astrophysics}. FR - Francouzská republika, 2011, vol.~531, A59, 7 pp. ISSN~0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201015549.
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