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@article{42944,
author = {Abramowicz, and Bakala, Pavel and Goluchová, Kateřina and Kluźniak, Włodek and Kotrlová, Andrea and Stuchlík, Zdeněk and Šrámková, Eva and Török, Gabriel},
article_location = {FR - Francouzská republika},
article_number = {June},
doi = {http://dx.doi.org/10.1051/0004-6361/201425241},
keywords = {X-rays: binaries; black hole physics; accretion; accretion disks},
language = {eng},
issn = {0004-6361},
journal = {Astronomy & Astrophysics},
title = {Black hole spin inferred from 3:2 epicyclic resonance model of high-frequency quasi-periodic oscillations},
url = {http://www.aanda.org/articles/aa/abs/2015/06/aa25241-14/aa25241-14.html},
volume = {578},
year = {2015}
}
TY - JOUR
ID - 42944
AU - Abramowicz,
AU - Bakala, Pavel - Goluchová, Kateřina - Kluźniak, Włodek - Kotrlová, Andrea - Stuchlík, Zdeněk - Šrámková, Eva - Török, Gabriel
PY - 2015
TI - Black hole spin inferred from 3:2 epicyclic resonance model of high-frequency quasi-periodic oscillations
JF - Astronomy & Astrophysics
VL - 578
IS - June
SP - "A90-1"-"A90-6"
EP - "A90-1"-"A90-6"
SN - 00046361
KW - X-rays: binaries
KW - black hole physics
KW - accretion
KW - accretion disks
UR - http://www.aanda.org/articles/aa/abs/2015/06/aa25241-14/aa25241-14.html
N2 - Estimations of black hole spin in the three Galactic microquasars GRS 1915+105, GRO J1655-40, and XTE J1550-564 have been carried out based on spectral and timing X-ray measurements and various theoretical concepts. Among others, a non-linear resonance between axisymmetric epicyclic oscillation modes of an accretion disc around a Kerr black hole has been considered as a model for the observed high-frequency quasi-periodic oscillations (HF QPOs). Estimates of spin predicted by this model have been derived based on the geodesic approximation of the accreted fluid motion. Here we assume accretion flow described by the model of a pressure-supported torus and carry out related corrections to the mass-spin estimates. We find that for dimensionless black holespin a equivalent to cJ/GM^2 less than or similar to 0.9, the resonant eigenfrequencies are very close to those calculated for the geodesic motion. Their values slightly grow with increasing torus thickness. These findings agree well wit
ER -
ABRAMOWICZ, Pavel BAKALA, Kateřina GOLUCHOVÁ, Włodek KLU$\backslash$'ZNIAK, Andrea KOTRLOVÁ, Zdeněk STUCHLÍK, Eva ŠRÁMKOVÁ a Gabriel TÖRÖK. Black hole spin inferred from 3:2 epicyclic resonance model of high-frequency quasi-periodic oscillations. \textit{Astronomy \&{} Astrophysics}. FR - Francouzská republika, roč.~578, June, s.~''A90-1''-''A90-6'', 6 s. ISSN~0004-6361. doi:10.1051/0004-6361/201425241. 2015.
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