In the past two decades, high-amplitude electromagnetic outbursts have been detected from
dormant galaxies and often attributed to the tidal disruption of a star by the central black …

Roughly half of the quasiperiodic eruption (QPE) sources in galactic nuclei exhibit a
remarkably regular alternating" long-short" pattern of recurrence times between consecutive …

Following the recent discovery of X-ray quasi-periodic eruptions (QPEs) coming from the
nucleus of the galaxy GSN 069, here we report on the detection of QPEs in the active galaxy …

Binary supermassive black hole (SMBH) systems result from galaxy mergers, and will
eventually coalesce due to gravitational wave (GW) emission if the binary separation can be …

Quasi-periodic eruptions (QPEs) are found in the center of five galaxies, where a tidal
disruption event (TDE)-like event has been reported in GSN 069, which occurred a couple of …

X-ray quasi-periodic eruptions (QPEs) are a recently discovered phenomenon associated
with supermassive black holes at the centers of galaxies. They are high-amplitude soft X-ray …

Context. Quasi-periodic eruptions (QPEs) are repeating thermal X-ray bursts associated with
accreting massive black holes, the precise underlying physical mechanisms of which are still …

Context. Quasi-periodic X-ray eruptions (QPEs) are a recently discovered phenomenon, the
nature of which remains unclear. Based on their discovery in active galactic nuclei (AGNs) …

Abstract 1ES 1927+ 654 is a nearby active galactic nucleus (AGN) that underwent a
changing-look event in early 2018, developing prominent broad Balmer lines that were …

Quasiperiodic eruptions (QPEs) are intense repeating soft x-ray bursts with recurrence times
about a few hours to a few weeks from galactic nuclei. Though the debates on the origin of …