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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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