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@article{37792,
author = {Kotrlová, Andrea and Šrámková, Eva and Török, Gabriel and Goluchová, Kateřina and Horák, Jiří and Straub, Odele},
article_number = {1-3},
doi = {http://dx.doi.org/10.1002/asna.201913572},
keywords = {accretion; accretion disks; binaries; black hole physics; X-rays},
language = {eng},
issn = {0004-6337},
journal = {Astronomische Nachrichten},
title = {Non-geodesic corrections to mass-spin estimates for Galactic microquasars implied by quasiperiodic oscillation models},
url = {https://onlinelibrary.wiley.com/doi/full/10.1002/asna.201913572},
volume = {340},
year = {2019}
}
TY - JOUR
ID - 37792
AU - Kotrlová, Andrea - Šrámková, Eva - Török, Gabriel - Goluchová, Kateřina - Horák, Jiří - Straub, Odele
PY - 2019
TI - Non-geodesic corrections to mass-spin estimates for Galactic microquasars implied by quasiperiodic oscillation models
JF - Astronomische Nachrichten
VL - 340
IS - 1-3
SP - 112-115
EP - 112-115
SN - 00046337
KW - accretion
KW - accretion disks
KW - binaries
KW - black hole physics
KW - X-rays
UR - https://onlinelibrary.wiley.com/doi/full/10.1002/asna.201913572
L2 - https://onlinelibrary.wiley.com/doi/full/10.1002/asna.201913572
N2 - We study frequencies of axisymmetric and non-axisymmetric epicyclic modes of accretion disk oscillations and explore the influence of pressure forces present in the disk. We utilize both approximate analytic methods and methods dealing with exact numerical solutions. Our investigation implies consequences for estimations of black hole spin in the three Galactic microquasars, namely GRS 1915+105, GRO J1655-40, and XTE J1550-564, which have been carried out based on several models of 3:2 high-frequency quasiperiodic oscillations (QPOs). In the particular case of 3:2 epicyclic resonance model, the presence of pressure forces affects the predicted QPO frequencies only slightly when a < 0.9. On the contrary, when a > 0.9, the influence of pressure forces is nonnegligible. Our findings indicate that for several models this influence can be quite significant even for low values of spin.
ER -
KOTRLOVÁ, Andrea, Eva ŠRÁMKOVÁ, Gabriel TÖRÖK, Kateřina GOLUCHOVÁ, Jiří HORÁK a Odele STRAUB. Non-geodesic corrections to mass-spin estimates for Galactic microquasars implied by quasiperiodic oscillation models. \textit{Astronomische Nachrichten}. 2019, roč.~340, 1-3, s.~112-115. ISSN~0004-6337. Dostupné z: https://dx.doi.org/10.1002/asna.201913572.
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