Models of high-frequency quasi-periodic oscillations and black hole spin estimates in Galactic microquasars
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00539765" target="_blank" >RIV/67985815:_____/20:00539765 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1051/0004-6361/201937097" target="_blank" >https://doi.org/10.1051/0004-6361/201937097</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201937097" target="_blank" >10.1051/0004-6361/201937097</a>
Alternative languages
Result language
angličtina
Original language name
Models of high-frequency quasi-periodic oscillations and black hole spin estimates in Galactic microquasars
Original language description
We explore the influence of nongeodesic pressure forces present in an accretion disc on the frequencies of its axisymmetric and nonaxisymmetric epicyclic oscillation modes. We discuss its implications for models of high-frequency quasi-periodic oscillations (QPOs), which have been observed in the X-ray flux of accreting black holes (BHs) in the three Galactic microquasars, GRS 1915+105, GRO J1655-40, and XTE J1550-564. We focus on previously considered QPO models that deal with low-azimuthal-number epicyclic modes, |m| <= 2, and outline the consequences for the estimations of BH spin, a is an element of [0, 1]. For four out of six examined models, we find only small, rather insignificant changes compared to the geodesic case. For the other two models, on the other hand, there is a significant increase of the estimated upper limit on the 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
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
1432-0746
e-ISSN
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Volume of the periodical
643
Issue of the periodical within the volume
October
Country of publishing house
FR - FRANCE
Number of pages
9
Pages from-to
A31
UT code for WoS article
000588072000002
EID of the result in the Scopus database
2-s2.0-85095110376