Context. X-ray quasi-periodic eruptions (QPEs) are repeating, high-amplitude, soft X-ray bursts observed from the nuclei of a dozen nearby low-mass galaxies. Their origin remains a major puzzle in the physics of accretion variability. Observational data indicate that X-ray and/or optical tidal disruption events (TDEs) may precede QPE detections

Quasar absorption systems not only affect the way quasars are selected, but also serve as key probes of galaxies, providing insight into their chemical evolution and interstellar medium (ISM). Recently, a method based on Gaia astrometric measurements has aided the selection of quasars reddened by dust hitherto overlooked. We conducted a

We present an analysis of 20 tidal disruption events (TDEs) host galaxies observed with the Multi-Unit Spectroscopic Explorer (MUSE) integral-field spectrograph on European Southern Observatory (ESO) Very Large Telescope (VLT). We investigate the presence of extended emission line regions (EELRs) and study stellar populations mostly at sub-kpc

Context. Optical flow methods aim to infer horizontal (transverse, in the general case) velocities in the solar atmosphere from the temporal changes in maps of physical quantities, such as intensity or magnetic field. So far, these methods have mostly been tested and applied to the continuum intensity and line-of-sight (LOS) magnetic field in the

Context. A subset of very young super-early galaxies at z ≳ 10, often called blue monsters, shows extremely blue UV continua and faint far-IR emission. This might imply much less dust than expected from standard enrichment scenarios. Aims. We wish to understand the reason for the apparent absence of dust in the blue monsters. To do this, we show by

Recent observations by the James Webb Space Telescope (JWST) have revealed a puzzling population of optically red and compact galaxies with peculiar 'V'-shaped spectra at high redshift, known as 'Little Red Dots' (LRDs). Until now, most spectroscopically confirmed LRDs are found at $z>4$ and it has been speculated that LRDs are tracing the early