X-ray quasi-periodic eruptions (QPEs) are a novel addition to the group of extragalactic
transients. With only a select number of known sources, and many more models published …

We propose that the recently observed quasi-periodic eruptions (QPEs) in galactic nuclei
are produced by unstable mass transfer due to Roche lobe overflow of a low-mass main …

In recent years, searches of archival X-ray data have revealed galaxies exhibiting nuclear
quasi-periodic eruptions with periods of several hours. These are reminiscent of the tidal …

Stars that interact with supermassive black holes (SMBHs) can be either completely or
partially destroyed by tides. In a partial tidal disruption event (TDE), the high-density core of …

Most tidal disruption events (TDEs) are currently found in time-domain optical and soft X-ray
surveys, both of which are prone to significant obscuration. The infrared (IR), however, is a …

Context. GSN 069 is the first galactic nucleus where quasi-periodic eruptions (QPEs) have
been identified in December 2018. These are high-amplitude, soft X-ray bursts recurring …

Galactic nuclei showing recurrent phases of activity and quiescence have recently been
discovered. Some have recurrence times as short as a few hours to a day and are known as …

Context. During its all-sky survey, the extended ROentgen Survey with an Imaging
Telescope Array (eROSITA) on board the Spectrum-Roentgen-Gamma (SRG) observatory …

The ROSAT-selected tidal disruption event (TDE) candidate RX J133157. 6− 324319.7
(J1331) was detected in 1993 as a bright [0.2–2 keV flux of (1.0±0.1)× 10− 12 erg s− 1 cm …

A star that approaches a supermassive black hole (SMBH) on a circular extreme mass ratio
inspiral (EMRI) can undergo Roche lobe overflow (RLOF), resulting in a phase of long-lived …