The Reoccurrence of mHz QPOs in Cygnus X-3

TL;DR

This study re-analyzed RXTE data of Cygnus X-3, discovering two new mHz QPO events linked to radio flares and jet ejections, enhancing understanding of the source's timing properties.

Contribution

It identifies new mHz QPO instances in Cygnus X-3 and links them to radio flares and jet ejections, expanding previous timing analysis.

Findings

Two new mHz QPO events detected

QPOs associated with major radio flares

QPOs linked to relativistic jet ejections

Abstract

We have re-analyzed archival RXTE data 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, that in turn is associated with relativistic jet ejection events. We review briefly scenarios whereby the Quasi-Periodic Oscillations may arise.