IZw18 is one of the lowest-metallicity star-forming galaxies known at z ∼ 0, considered a unique local analogue of the first galaxies. The origin of its hard ionizing continuum, expected to be a common feature in the early Universe and traced by He II emission lines, remains intensely debated and challenging to explain. Here we combine optical Gran

To investigate the impact of winds and jets with a low to moderate power on the cold molecular gas reservoirs of active galactic nuclei (AGN), we present observations with a high angular resolution with ALMA CO(2–1) and CO(3–2) of a sample of six type 2 quasars (QSO2s) at z ∼ 0.1 from the quasar feedback (QSOFEED) sample. We used spatially resolved

Aims. The light curves of the microlensing events MOA-2022-BLG-091 and KMT-2024-BLG-1209 exhibit anomalies with very similar features. These anomalies appear near the peaks of the light curves, where the magnifications are moderately high, and are distinguished by weak caustic-crossing features with minimal distortion while the source remains

Context. Forced magnetic reconnection is triggered by external perturbations, which are ubiquitous in the solar corona. This process plays a crucial role in the energy release during solar transient events, which are often associated with electric current sheets (CSs). The CSs can often disintegrate through the development of the tearing

We present deep K s-band imaging of the extreme T subdwarf CWISE J221706.28‑145437.6. Using the new photometry, we construct its spectral energy distribution and find this object exhibits exceptionally strong collision-induced absorption in the H and K band. The comparison with the nearest benchmark extreme T subdwarf WISEA J181006.18‑101000.5

Context. A fraction of the small bodies that formed in the outer Solar System (beyond Uranus and Neptune) are predicted to have been implanted in the inner Solar System (P- and D-type asteroids and Jupiter trojans) following the outward migration of these two planets (Nice model). Aims. We further test the hypothesis that small bodies in the inner