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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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

  • 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