Speaker
Description
X-ray Quasi-Periodic Eruptions (QPEs) are high-amplitude bursts of X-ray radiation recurring every few hours and originating near the central black holes in galactic nuclei of low-mass galaxies. So far, only a handful of such events has been found, although with rising interest in the broader community given their observational and theoretical connection with tidal disruption events and, possibly, low-frequency gravitational wave sources. As a matter of fact, some of the latest models suggest that these eruptions are triggered by extreme mass ratio inspirals, in which the secondary body interacts with the accretion flow around the primary. This accretion flow is suggested to be short-lived and fed by a previous TDE. I will outline the observational properties of QPE sources and the latest insights from theoretical models.
