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    Modelling the twin peak QPO distribution in the atoll source 4U 1636-53

    Zdeněk Stuchlík · 01 prosince, 2007 · Fyzika · 0 comments
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    Publication date: Dec 2007

    Abstract:
    Relation between the lower and upper frequency mode of twin peak
    quasiperiodic oscilations observed in neutron star X-ray binaries is
    qualitatively well fitted by the frequency relation following from the
    relativistic precession model. Assuming this model with no preferred
    radius and the probability of a twin QPO excitation being uniform across
    the inner edge of an accretion disc, we compare the expected and
    observed twin peak QPO distribution in the case of atoll source 4U
    1636-53. We find these two distributions highly incompatible. We also
    find that the observed distribution roughly corresponds to the expected
    one if an additional consideration of preferred resonant orbits is
    included. We notice that our findings are relevant for some
    disc-oscillation QPO models as well.

    Authors:
    Török, Gabriel; Bakala, Pavel; Stuchlík, Zdeněk; Čech, Petr;

    http://adsabs.harvard.edu/abs/2007ragt.meet..479T

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