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    Models of quasi-periodic oscillations related to mass and spin of the GRO J1655-40 black hole

    Zdeněk Stuchlík · Únor 01, 2016 · Fyzika · 0 comments
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    Publication date: Feb 2016

    Abstract:
    Frequencies of the three quasi-periodic oscillation (QPO) modes observed
    simultaneously in the accreting black hole GRO J1655-40 are compared
    with the predictions of models. Models in which all three QPO signals
    are produced at the same radius are considered: these include different
    versions of relativistic precession, epicyclic resonance, tidal
    disruption, and warped disc models. Models that were originally proposed
    to interpret only the twin high-frequency QPOs are generalized here to
    interpret also the low-frequency QPO in terms of relativistic nodal
    precession. Inferred values of the black hole mass and spin from each
    QPO model are compared with the mass measured from optical observations
    and the spin inferred from X-ray spectroscopy techniques. We find that
    along with the relativistic precession model predicting M = (5.3 ± 0.1)
    M☉,a = 0.286 ± 0.004, the so-called total precession model (M
    = (5.5 ± 0.1) M☉,a = 0.276 ± 0.003), and the resonance
    epicyclic model with beat frequency (M = (5.1 ± 0.1) M☉,a =
    0.274 ± 0.003) also satisfy the optical mass test.

    Authors:
    Stuchlík, Zdeněk; Kološ, Martin;

    https://ui.adsabs.harvard.edu/abs/2016A&A…586A.130S

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