Non-geodesic corrections to mass-spin estimates for Galactic microquasars implied by quasiperiodic oscillation models
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00518283" target="_blank" >RIV/67985815:_____/19:00518283 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0303443" target="_blank" >http://hdl.handle.net/11104/0303443</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/asna.201913572" target="_blank" >10.1002/asna.201913572</a>
Alternative languages
Result language
angličtina
Original language name
Non-geodesic corrections to mass-spin estimates for Galactic microquasars implied by quasiperiodic oscillation models
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomische Nachrichten
ISSN
1521-3994
e-ISSN
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Volume of the periodical
340
Issue of the periodical within the volume
1-3
Country of publishing house
DE - GERMANY
Number of pages
4
Pages from-to
112-115
UT code for WoS article
000468591100022
EID of the result in the Scopus database
2-s2.0-85063485529