Non-geodesic corrections to mass-spin estimates for Galactic
microquasars implied by quasiperiodic oscillation models

J 2019

Non-geodesic corrections to mass-spin estimates for Galactic microquasars implied by quasiperiodic oscillation models

KOTRLOVÁ, Andrea, Eva ŠRÁMKOVÁ, Gabriel TÖRÖK, Kateřina GOLUCHOVÁ, Jiří HORÁK et. al.

Basic information

Original name

Non-geodesic corrections to mass-spin estimates for Galactic microquasars implied by quasiperiodic oscillation models

Authors

KOTRLOVÁ, Andrea (203 Czech Republic, guarantor, belonging to the institution), Eva ŠRÁMKOVÁ (203 Czech Republic, belonging to the institution), Gabriel TÖRÖK (203 Czech Republic, belonging to the institution), Kateřina GOLUCHOVÁ (203 Czech Republic, belonging to the institution), Jiří HORÁK (203 Czech Republic) and Odele STRAUB (756 Switzerland, belonging to the institution)

Edition

Astronomische Nachrichten, 2019, 0004-6337

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

Germany

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

RIV identification code

RIV/47813059:19240/19:A0000439

Organization unit

Faculty of Philosophy and Science in Opava

DOI

http://dx.doi.org/10.1002/asna.201913572

UT WoS

000468591100022

Keywords in English

accretion; accretion disks; binaries; black hole physics; X-rays

Links

GA17-16287S, research and development project. LTI17018, research and development project.

Změněno: 27/4/2021 09:39, Jan Vlha

Abstract

V originále

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.

Citovat

KOTRLOVÁ, Andrea, Eva ŠRÁMKOVÁ, Gabriel TÖRÖK, Kateřina GOLUCHOVÁ, Jiří HORÁK and Odele STRAUB. Non-geodesic corrections to mass-spin estimates for Galactic microquasars implied by quasiperiodic oscillation models. Astronomische Nachrichten. 2019, vol. 340, 1-3, p. 112-115. ISSN 0004-6337. Available from: https://dx.doi.org/10.1002/asna.201913572.

@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 and Odele STRAUB. Non-geodesic corrections to mass-spin estimates for Galactic microquasars implied by quasiperiodic oscillation models. \textit{Astronomische Nachrichten}. 2019, vol.~340, 1-3, p.~112-115. ISSN~0004-6337. Available from: https://dx.doi.org/10.1002/asna.201913572.

Detailed Information on Publication Record