The re-occurrence of mHz quasi-periodic oscillations in Cygnus X-3
Koljonen, Karri I. I.
Hannikainen, Diana Carina
McCollough, Michael L.
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We have re-analysed archivalRXTEdata of the X-ray binary Cygnus X-3 with a view to investigate the timing properties of the source. As compared to previous studies, we use an extensive sample of observations that include all the radio/X-ray spectral states that have been categorized in the source recently. In this study we identify two additional instances of quasi-periodic oscillations that have centroid frequencies in the mHz regime. These events are all associated to a certain extent with major radio flaring, which in turn is associated with relativistic jet ejection events. We review briefly scenarios whereby the quasi-periodic oscillations may arise.